On-Load Tap-Changer VACUTAP VR I HD-Ex

Transcription

1 On-Load Tap-Changer VACUTAP VR I HD-Ex Installation and Commissioning Instructions /00 EN

2 All rights reserved by Maschinenfabrik Reinhausen Dissemination and reproduction of this document and use and disclosure of its content are strictly prohibited unless expressly permitted. Infringements will result in liability for compensation. All rights reserved in the event of the granting of patents, utility models or designs. The product may have been altered since this document was published. We reserve the right to change the technical data, design and scope of supply. Generally the information provided and agreements made when processing the individual quotations and orders are binding. The original operating instructions were written in German.

3 Table of contents Table of contents 1 Introduction Manufacturer Subject to change without notice Completeness Safekeeping Notation conventions Symbols Hazard communication system Information system Safety Appropriate use Fundamental safety instructions Standards and regulations Application range of the on-load tap-changer Standards and regulations Measures for ensuring compliance with explosion protection requirements Measures taken by the manufacturer Measures to be taken by the transformer manufacturer/operator Personnel qualification Personal protective equipment Product description Scope of delivery On-load tap-changer Function description Setup/models Name plate Drive shaft Function description Design/Model Identification plate Protective relay Function description Setup/versions Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 3

4 Table of contents Name plate Packaging, transport and storage Packaging Suitability Markings Transportation, receipt and handling of shipments Storage of shipments Unpacking shipments and checking for transportation damages Mounting Preparatory work Fitting mounting flange on transformer cover Fitting stud bolts on mounting flange Installing the standard version on-load tap-changer in the transformer Fastening on-load tap-changer to transformer cover Connecting the tap winding and on-load tap-changer take-off lead Carrying out transformer ratio test before drying Measuring DC resistance on transformer Drying on-load tap-changer in autoclave Drying on-load tap-changer in transformer tank Carrying out transformer ratio test after drying Installing on-load tap-changer in transformer (bell-type tank version) Inserting on-load tap-changer into supporting structure Connecting the tap winding and on-load tap-changer take-off lead Carrying out transformer ratio test before drying Measuring DC resistance on transformer Drying on-load tap-changer in autoclave Lifting top part of on-load tap-changer head off supporting flange (bottom part) Fit the bell-type tank and connect the on-load tap-changer to the top part of the on-load tap-changer head Drying on-load tap-changer in transformer tank Carrying out transformer ratio test after drying Filling the oil compartment of the on-load tap-changer with oil Fitting protective devices and drive components Connecting the tap-change supervisory device Installing protective relay in piping and connecting Fitting motor-drive unit VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

5 Table of contents Fitting drive shaft Centering on-load tap-changer and motor-drive unit Installing electrics for motor-drive unit Commissioning the on-load tap-changer at the transformer manufacturer's site Bleeding on-load tap-changer head and suction pipe Bleeding on-load tap-changer head Bleeding suction pipe on pipe connection S Grounding the on-load tap-changer Performing tests on motor-drive unit Performing trial tap-change operations High-voltage tests on the transformer Transporting transformer to the operating site Transport with removed drive Transport with oil fill and without oil conservator Transport without oil fill Emptying oil compartment via pipe connection S Commissioning the transformer at the operating site Checking motor-drive unit Checking protective relay Checking protective relay (RS 2001, 2001/V, 2001/H, 2001/E, 2001/5, 2001/R, 2003) Checking protective relay (RS 2004) Filling the oil compartment of the on-load tap-changer with oil Bleeding on-load tap-changer head and suction pipe Bleeding on-load tap-changer head Bleeding suction pipe on pipe connection S Performing trial tap-change operations Commissioning the transformer Fault elimination Tripping of the protective relay and re-commissioning the transformer Flap valve in IN SERVICE position Flap valve in OFF position Re-commissioning the transformer Technical data Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 5

6 Table of contents 10.1 Limit values for dielectric strength and water content of on-load tap-changer oil Technical data for protective relay Protective relay with several dry-reed magnetic switches Drawings VACUTAP VRC/VRE-Ex, installation drawing (899992) VACUTAP VRC/VRE-Ex, installation drawing (743600) VACUTAP VRD/VRF-Ex, installation drawing (899898) VACUTAP VRD/VRF-Ex, installation drawing (743601) VACUTAP VRG-Ex, installation drawing (899945) VACUTAP VRG-Ex, installation drawing (743602) VACUTAP VRC/VRE-Ex, installation position of tap selector connection contacts (727042) VACUTAP VRC/VRE-Ex, installation position of tap selector connection contacts (743603) VACUTAP VRD/VRF/VRG-Ex, fine tap selector connection contact and change-over selector connection contact (899941) VACUTAP VR-Ex, special design for bell-type tank installation (720781) VACUTAP VR-Ex, lifting device for bell-type tank installation (720845) VACUTAP VR-Ex, on-load tap-changer head (720847) Pipe connection Q with tap-change supervisory control (766161) VACUTAP VR-Ex, adjustment positions (728557) VACUTAP VRC/VRE-Ex, adjustment plan without change-over selector (719853) VACUTAP VRC/VRE-Ex, adjustment plan without change-over selector (742422) VACUTAP VRD/VRF-Ex, adjustment plan without change-over selector (721089) VACUTAP VRD/VRF-Ex, adjustment plan without change-over selector (742423) VACUTAP VRC III/VRC II/VRE III-Ex, adjustment plan with reversing change-over selector connection (719850) VACUTAP VRC I/VRE I-Ex, adjustment plan with reversing change-over selector connection (719851) VACUTAP VRD/VRF-Ex, adjustment plan with reversing change-over selector connection (721092) VACUTAP VRD/VRF-Ex, adjustment plan with reversing change-over selector connection (745024) VACUTAP VRG-Ex, adjustment plan with reversing change-over selector connection (727074) VACUTAP VRG-Ex, adjustment plan with reversing change-over selector connection (742424) VACUTAP VRC/VRE-Ex, adjustment plan with coarse tap selector connection (719852) VACUTAP VRC/VRE-Ex, adjustment plan with coarse tap selector connection (742425) VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

7 Table of contents Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 10, 2-5 coarse tap connections (731412) Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 10, 2-5 coarse tap connections (745032) Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 12, 2-5 coarse tap connections (731411) Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 12, 2-5 coarse tap connections (745031) Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 14, 2-5 coarse tap connections (731410) Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 14, 2-5 coarse tap connections (745030) Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 16, 2-5 coarse tap connections (731000) Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 16, 2-5 coarse tap connections (745029) Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 18, 2-5 coarse tap connections (730977) Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 18, 2-5 coarse tap connections (745028) VACUTAP VRD/VRF-Ex, adjustment plan with coarse tap selector connection (721091) VACUTAP VRD/VRF-Ex, adjustment plan with coarse tap selector connection (742426) VACUTAP VRG-Ex, adjustment plan with coarse tap selector connection (727075) VACUTAP VRG-Ex, adjustment plan with coarse tap selector connection (742427) Tracing template for on-load tap-changer head (890183) Socket wrench for kerosene drain plug (723015) Screw tools for installation and maintenance (723016) Bevel gear CD 6400, dimensional drawing (892916) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 7

8 1 Introduction 1 Introduction This technical file contains detailed descriptions of the safe and proper installation, connection, and commissioning of the product. It also includes safety instructions and general information about the product. Information about operation can be found in the operating instructions. This technical file is intended solely for specially trained and authorized personnel. 1.1 Manufacturer The product is manufactured by: Maschinenfabrik Reinhausen GmbH Falkensteinstraße Regensburg, Germany Tel.: (+49) 9 41/ Fax: (+49) 9 41/ sales@reinhausen.com Further information on the product and copies of this technical file are available from this address if required. 1.2 Subject to change without notice The information contained in this technical file comprises the technical specifications approved at the time of printing. Significant modifications will be included in a new edition of the technical file. The document number and version number of this technical file are shown in the footer. 1.3 Completeness This technical file is incomplete without the supporting documents. The following documents apply: Unpacking instructions (included in the scope of delivery) Supplement (included in the scope of delivery) Routine test report (included in the scope of delivery) Connection diagrams (included in the scope of delivery) Dimensional drawings (included in the scope of delivery) Technical data - General section (available on request) Technical data - Product-specific section (available on request) 8 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

9 1 Introduction 1.4 Safekeeping Keep this technical file and all supporting documents ready at hand and accessible for future use at all times. 1.5 Notation conventions This section contains an overview of the symbols and textual emphasis used Symbols Symbol Meaning Wrench size Tightening torque Number and type of fastening material used Fill with oil Cut open, cut through Clean Visual inspection Use your hand Adapter ring Apply a coat of paint Use a file Grease Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 9

10 1 Introduction Symbol Meaning Coupling bolt Use a ruler Use a saw Hose clip Wire eyelet, safety wire Use a screwdriver Apply adhesive Lock tab Table 1: Symbols Hazard communication system Warnings in this technical file are displayed as follows Warning relating to section Warnings relating to sections refer to entire chapters or sections, sub-sections or several paragraphs within this technical file. Warnings relating to sections use the following format: WARNING Type and source of danger Consequences Action Action Embedded warning information Embedded warnings refer to a particular part within a section. These warnings apply to smaller units of information than the warnings relating to sections. Embedded warnings use the following format: 10 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

11 1 Introduction DANGER! Instruction for avoiding a dangerous situation Signal words and pictograms The following signal words are used: Signal word DANGER WARNING CAUTION NOTICE Meaning Indicates a hazardous situation which, if not avoided, will result in death or serious injury. Indicates a hazardous situation which, if not avoided, could result in death or serious injury. Indicates a hazardous situation which, if not avoided, could result in injury. Indicates measures to be taken to prevent damage to property. Table 2: Signal words in warning notices Pictograms warn of dangers: Pictogram Meaning Warning of a danger point Warning of dangerous electrical voltage Warning of combustible substances Warning of danger of tipping Table 3: Pictograms used in warning notices Information system Information is designed to simplify and improve understanding of particular procedures. In this technical file it is laid out as follows: Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 11

12 1 Introduction Important information. 12 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

13 2 Safety 2 Safety This technical file contains detailed descriptions on the safe and proper installation, connection, commissioning and monitoring of the product. Read this technical file through carefully to familiarize yourself with the product. This technical file is part of the product. Read and observe the safety instructions provided in this chapter in particular. Observe the warnings in this technical file in order to avoid function-related dangers. The product is manufactured on the basis of state-of-the-art technology. Nevertheless, risks to life and limb of the user or impairment of the product and other material assets may occur during use due to function-related dangers. 2.1 Appropriate use The product is an on-load tap-changer and keeps the output voltage of a transformer constant. The product is designed solely for use in electrical energy systems and facilities. If used as intended and in compliance with the requirements and conditions specified in this technical file as well as the warning notices in this technical file and attached to the product, then the product does not present any danger to people, property or the environment. This applies across the entire service life of the product, from delivery to installation and operation through to disassembly and disposal. The following is considered appropriate use: Use the product only with the transformer specified in the order. The serial numbers of on-load tap-changers and on-load tap-changer accessories (drive, drive shaft, bevel gear, protective relay, etc.) must match if the on-load tap-changers and on-load tap-changer accessories are supplied as a set for one order. You will find the standard valid for the product and the year of issue on the nameplate. Operate the product in accordance with this technical file, the agreedupon delivery conditions and the technical data. Ensure that all necessary work is performed by qualified personnel only. Only use the equipment and special tools included in delivery for the intended purpose and in accordance with the specifications of this technical file. The on-load tap-changer is not intended to be used with an oil filter unit. The measures described in this technical file must be taken in order to comply with explosion protection requirements. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 13

14 2 Safety 2.2 Fundamental safety instructions To prevent accidents, disruptions and damage as well as unacceptable adverse effects on the environment, those responsible for transport, installation, operation, maintenance and disposal of the product or parts of the product must ensure the following: Personal protective equipment Loosely worn or unsuitable clothing increases the danger of becoming trapped or caught up in rotating parts and the danger of getting caught on protruding parts. This increases the danger to life and limb. All necessary devices and personal protective equipment required for the specific task, such as a hard hat, safety footwear, etc. must be worn. Observe the section "Personal protective equipment" [ 23]. Never wear damaged personal protective equipment. Never wear rings, necklaces, or other jewelry. If you have long hair, wear a hairnet. Work area Untidy and poorly lit work areas can lead to accidents. Keep the work area clean and tidy. Make sure that the work area is well lit. Observe the applicable laws for accident prevention in the relevant country. Working during operation You must only operate the product when it is in a sound operational condition. Otherwise it poses a danger to life and limb. Regularly check the operational reliability of safety equipment. Comply with the maintenance work and maintenance intervals described in this technical file. Explosion protection Highly flammable or explosive gases, vapors and dusts can cause serious explosions and fire. Do not install the product in potentially explosive areas. Safety markings Warning signs and safety information plates are safety markings on the product. They are an important aspect of the safety concept. Observe all safety markings on the product. Make sure all safety markings on the product remain intact and legible. Replace safety markings that are damaged or missing. 14 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

15 2 Safety Ambient conditions To ensure reliable and safe operation, the product must only be operated under the ambient conditions specified in the technical data. Observe the specified operating conditions and requirements for the installation location. Auxiliary materials and operating materials Auxiliary materials and operating materials not approved by Maschinenfabrik Reinhausen GmbH could damage the product. Only use lubricants and auxiliary materials approved by the manufacturer. Contact Maschinenfabrik Reinhausen GmbH. Modifications and conversions Unauthorized or inappropriate changes to the product may lead to personal injury, material damage and operational faults. Only modify product following consultation with Maschinenfabrik Reinhausen GmbH. Spare parts Spare parts not approved by Maschinenfabrik Reinhausen GmbH may cause physical injury and damage the product. Only use spare parts approved by the manufacturer. Contact Maschinenfabrik Reinhausen GmbH. 2.3 Standards and regulations The standards and regulations which apply to the explosion-protected product are described in the following chapters Application range of the on-load tap-changer The on-load tap-changer is certified for Ex II 3G Ex nac IIC T3 Gc. Refer to the following overview for the resulting application range II 3G Ex nac IIC T3 Gc Table 4: Example of the application range Number Meaning 1 Sign for explosion protection 2 Equipment group 3 Equipment category Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 15

16 2 Safety Number Meaning 4 Ex: Symbol for explosion-protected equipment 5 Ignition protection type 6 Explosion group 7 Temperature class 8 EPL (Equipment Protection Level) Equipment groups (number 2) I II Table 5: Equipment groups Equipment in this category is intended for use in underground parts of mines as well as those parts of surface installations of such mines endangered by firedamp and/or combustible dust. Equipment in this category is intended for use in other areas in which explosive atmospheres may be present. Equipment category / zone classification (number 3) Designation for gases 1G (0) 2G (1) 3G (2) Designation for dusts 1D (20) 2D (21) 3D (22) Definition Table 6: Equipment category / zone classification Ignition protection types (number 5) Equipment in this category is intended for use in areas in which explosive atmospheres caused by mixtures of air and gases, vapors or mists or by air/dust mixtures are present continuously, for long periods or frequently. Equipment in this category is intended for use in areas in which explosive atmospheres caused by gases, vapors, mists or air/dust mixtures occur occasionally. Equipment in this category is intended for use in areas in which explosive atmospheres caused by gases, vapors, mists, or air/dust mixtures are unlikely to occur or, if they do occur, are likely to do so only infrequently and for a short period only. d e I m o p Pressure-proof enclosure Increased safety Intrinsic safety (ia, ib) Encapsulation Oil immersion Pressurized apparatus 16 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

17 2 Safety q Powder filling n Ignition protection type "n" (only zone 2) Table 7: Ignition protection types Explosion group (number 6) n A: non-sparking equipment n C: sparking equipment with special protection for contacts n R: vapor-protected housing EN/IEC Gases, vapors (examples) Min. ignition energy (mj) IIA Ammonia - IIA Acetic acid, acetone, benzene, diesel, ethane, ether, fuel oil, hexane, methane, petrol, petroleum, propane 0.18 IIB Ethylene, isoprene, town gas 0.06 IIC Table 8: Explosion groups Temperature classes (number 7) Acetylene, carbon disulfide, hydrogen Temperature class Maximum equipment surface temperature 0.02 T1 450 C > 450 C Ignition temperature of the flammable substances T2 300 C > 300 C < 450 C T3 200 C > 200 C < 300 C T4 135 C > 135 C < 200 C T5 100 C > 100 C < 135 C T6 85 C > 85 C < 100 C Table 9: Temperature classes Equipment protection level (EPL) (number 8) The EPL indicates the level of protection defined for a device based on the level of probability of ignition and taking account of the differences between potentially explosive gas atmospheres, potentially explosive dust atmospheres, and potentially explosive atmospheres in mine workings affected by firedamp. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 17

18 2 Safety Standards and regulations The following standards and regulations apply to explosion-proof on-load tap-changers: EN : Equipment General requirements EN : Equipment protection by type of protection "n" Additional requirements apply to vacuum interrupters, as these are hermetically sealed devices that generate arcs, sparks or hot surfaces. Additional requirements apply to the diverter switch oil compartment, as this is a sealed or encapsulated device that generates arcs, sparks or hot surfaces Measures for ensuring compliance with explosion protection requirements Measures taken by the manufacturer Maschinenfabrik Reinhausen has taken the following measures for ensuring compliance with explosion protection requirements. You do not need to take any special measures in this regard Quality of the insulating oil in the on-load tap-changer The quality of the insulating oil required by IEC and the quality of the synthetic esters required by IEC in the oil compartment of the on-load tap-changer is ensured by using vacuum cells in transition resistors Monitoring the oil temperature in the diverter switch oil compartment A temperature sensor is provided in the on-load tap-changer head cover for monitoring the oil temperature in the diverter switch oil compartment. The corresponding temperature monitoring relay is in the TAPMOTION ED-Ex. Temperature monitoring prevents further switching of the on-load tap-changer when the maximum permitted temperature is reached. This maximum permitted temperature is factory-configured for each specific order for all onload tap-changer types (maximum 130 C) and secured against accidental incorrect adjustment Measures to be taken by the transformer manufacturer/operator The following measures for ensuring compliance with explosion protection requirements must be taken by the transformer manufacturer/operator. 18 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

19 2 Safety Prescribed protective and drive components Operate the on-load tap-changer only in conjunction with the following components: Ex protective relay Ex motor-drive unit Ex drive shaft Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 19

20 2 Safety Setting up the on-load tap-changer oil system Operate the on-load tap-changer only with a suitable oil system. This diverter switch oil system consists of the diverter switch oil compartment, protective relay, and oil conservator of the on-load tap-changer. It ensures that enough insulating oil is present in the diverter switch oil compartment at all times. Figure 1: On-load tap-changer oil system 1 Diverter switch oil compartment 5 Signaling contacts 2 Temperature sensor 6 Oil conservator 3 Protective relay 7 Dehydrating breather 4 Level indicator Oil conservator to be used The oil conservator of the on-load tap-changer ensures that sufficient insulating oil is present in the on-load tap-changer oil system at all times during operation. Therefore, operate the on-load tap-changer only with a oil conservator that fulfills the following requirements: 20 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

21 2 Safety Dehydrating breather The oil conservator must be equipped with a dehydrating breather in accordance with VDE The dehydrating breather prevents water, impurities, insects etc. from entering the insulating oil Level indicator The oil conservator must have a level indicator from which the minimum oil quantity required and the maximum quantity permitted, as well as the current oil level, can be read Level monitoring The oil level in the oil conservator must be monitored at all times during operation. Therefore, loop the signaling contact for falling below the minimum oil level in the on-load tap-changer's oil conservator to the tripping circuit of the circuit breaker so that the circuit breaker will immediately de-energize the transformer when the oil level in the oil conservator falls below this minimum Insulating oil to be used When filling the diverter switch oil compartment and its oil conservator, use only new mineral insulating oil for transformers in accordance with IEC (Specification for unused mineral insulating oils for transformers and switchgear) or synthetic ester in accordance with IEC (Specifications for unused synthetic organic esters for electrical purposes) Checking the quality of the insulating oil in the Ex transformer During the tap changes, polarity sparks (low energy) may occur at the tap selector of the on-load tap-changer in the transformer tank. In this regard, observe Section and in the on-load tap-changer standard IEC Therefore, check the quality and dielectric strength of the insulating oil in the transformer tank on a regular basis and comply with the service intervals for the oil change. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 21

22 2 Safety Corrosion protection measures Because further installation steps are required before operation of the onload tap-changer, sufficient corrosion protection cannot be provided at certain interfaces to the transformer when the device leaves the factory. Figure 2: On-load tap-changer head 1 Sealing surface on piping connection flange 3 Contact surface on on-load tap-changer head 2 Air-vent valve 4 Through-holes The sealing surfaces on the piping connection flange are zinc-plated ex factory. The through-holes are zinc-plated and partially painted. The contact surface of the on-load tap-changer head is primed ex factory. The through-holes are primed and partially painted. The transformer manufacturer is responsible for the design of the mating surfaces on the transformer and piping and that of the screw connections needed for these attachments. 1. Provide suitable sealing to prevent electrolytes from entering sealing surfaces and holes. 2. Design screws, washers, nuts etc. in A4 in accordance with ISO /ISO standard. 3. If the painted surfaces are damaged, note repair instructions. These can be requested from Maschinenfabrik Reinhausen GmbH's Technical Service department. 2.5 Personnel qualification The person responsible for assembly, commissioning, operation, maintenance and inspection must ensure that the personnel are sufficiently qualified. 22 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

23 2 Safety Electrically skilled person The electrically skilled person has a technical qualification and therefore has the required knowledge and experience, and is also conversant with the applicable standards and regulations. The electrically skilled person is also proficient in the following: Can identify potential dangers independently and is able to avoid them. Is able to perform work on electrical systems. Is specially trained for the working environment in which (s)he works. Must satisfy the requirements of the applicable statutory regulations for accident prevention. Electrically trained persons An electrically trained person receives instruction and guidance from an electrically skilled person in relation to the tasks undertaken and the potential dangers in the event of inappropriate handling as well as the protective devices and safety measures. The electrically trained person works exclusively under the guidance and supervision of an electrically skilled person. Operator The operator uses and operates the product in line with this technical file. The operating company provides the operator with instruction and training on the specific tasks and the associated potential dangers arising from improper handling. Technical Service We strongly recommend having maintenance, repairs and retrofitting carried out by our Technical Service department. This ensures that all work will be performed correctly. If maintenance is not carried out by our Technical Service department, please ensure that the personnel who carry out the maintenance are trained and authorized by Maschinenfabrik Reinhausen GmbH to carry out the work. Authorized personnel Authorized personnel are trained by Maschinenfabrik Reinhausen GmbH to carry out special maintenance. 2.6 Personal protective equipment Personal protective equipment must be worn during work to minimize risks to health. Always wear the personal protective equipment required for the job at hand. Never wear damaged personal protective equipment. Observe information about personal protective equipment provided in the work area. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 23

24 2 Safety Personal protective equipment to be worn at all times Protective clothing Close-fitting work clothing with a low tearing strength, with tight sleeves and with no protruding parts. It mainly serves to protect the wearer against being caught by moving machine parts. Safety shoes To protect against falling heavy objects and slipping on slippery surfaces. Special personal protective equipment for particular environments Safety glasses To protect the eyes from flying parts and splashing liquids. Visor To protect the face from flying parts and splashing liquids or other dangerous substances. Hard hat To protect from falling and flying parts and materials. Hearing protection To protect from hearing damage. Protective gloves To protect from mechanical, thermal, and electrical hazards. 24 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

25 3 Product description 3 Product description This chapter contains an overview of the design and function of the product. 3.1 Scope of delivery The product is packaged with protection against moisture and is usually delivered as follows: Oil compartment with on-load tap-changer head and built-in diverter switch insert Selector Ex motor-drive unit Ex drive shaft with coupling parts and bevel gear Ex protective relay Technical files Please refer to the delivery slip for full details of scope of delivery. Single-phase on-load tap-changers are also available as an on-load tapchanger set with a common motor-drive unit. Note the following information: Check the shipment for completeness on the basis of the shipping documents. Store the parts in a dry place until installation The product must remain in its airtight, protective wrapping and may only be removed immediately before installation You will find more information in the "Packaging, transport, and storage" [ 38] chapter On-load tap-changer Function description On-load tap-changers are used to adjust the transmission ratio of transformers without interrupting the load flow. Fluctuations in voltage occurring in the power transmission grid, for example, can therefore be compensated for. For this purpose, on-load tap-changers are fitted in transformers and connected to the active part of the transformer. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 25

26 3 Product description A motor-drive unit, which receives a control impulse (e.g. from a voltage regulator), changes the on-load tap-changer's operating position, which adapts the transmission ratio of the transformer to the respective operating requirements. Figure 3: System overview of on-load tap-changer Transformer 1 Transformer tank 6 Upper gear unit 2 Motor-drive unit 7 On-load tap-changer 3 Vertical drive shaft 8 RS protective relay 4 Bevel gear 9 Oil conservator 5 Horizontal drive shaft 10 Active part of the transformer Setup/models The on-load tap-changer consists of the on-load tap-changer head, oil compartment with built-in diverter switch insert and the tap selector mounted below (also available with change-over selector on request). The design and designation of the most important on-load tap-changer components are shown in the installation drawings in the appendix. 26 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

27 3 Product description For the number of maximum operating positions of the on-load tap-changer, refer to the Technical data. Figure 4: VACUTAP VRC/VRE 1 On-load tap-changer head 3 Tap selector 2 Oil compartment 4 Change-over selector Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 27

28 3 Product description Figure 5: VACUTAP VRD/VRF 1 On-load tap-changer head 3 Tap selector 2 Oil compartment 4 Change-over selector 28 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

29 3 Product description Figure 6: VACUTAP VRG 1 On-load tap-changer head 3 Tap selector 2 Oil compartment 4 Change-over selector Pipe connections The on-load tap-changer head features 4 pipe connections for different purposes. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 29

30 3 Product description Depending on the order, some or all of these pipe connections are fitted with pipe bends ex factory. All pipe bends without terminal box for the tap-change supervisory control can be freely swiveled once the pressure ring is loosened. Figure 7: Pipe connections with pipe bends Pipe connection Q Pipe connection Q is sealed off with a blank cover and, depending on the on-load tap-changer type, is intended for the bushing of the tap-change supervisory device supplied as an option. The functions of the R and Q pipe connections can be interchanged. Pipe connection S The pipe bend on pipe connection S features a vent screw and can be connected to a pipe that ends with a drain valve on the side of the transformer tank at operating height. If the on-load tap-changer is fitted with an oil suction pipe, the on-load tap-changer can be completely emptied via pipe connection S. Pipe connection R Pipe connection R is provided for attachment of the protective relay and connection of the on-load tap-changer oil conservator and can be interchanged with pipe connection Q. Pipe connection E2 The pipe connection E2 is sealed off with a blank cover. It leads into the oil tank of the transformer, directly under the on-load tap-changer head and can be connected to a collective pipe for the Buchholz relay, if necessary. This pipe connection serves a further purpose, namely to equalize the pressure 30 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

31 3 Product description between the transformer tank and oil compartment of the on-load tap-changer, which is necessary for drying, oil filling and transportation of the transformer Name plate The name plate is on the on-load tap-changer head cover. Figure 8: Position of name plate Drive shaft Function description The drive shaft is the mechanical connection between drive and on-load tapchanger head. The bevel gear changes the direction from vertical to horizontal (see drawing ). Accordingly, the vertical drive shaft has to be mounted between drive and bevel gear and the horizontal drive shaft between bevel gear and on-load tap-changer or de-energized tap-changer. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 31

32 3 Product description The explosion-proof drive shaft consists of a square tube with insulator and is coupled by two coupling brackets and one coupling bolt at both ends to the drive or driven shaft end of the device to be connected. Figure 9: Explosion-proof drive shaft with insulator 32 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

33 3 Product description Design/Model The design of the explosion-proof drive shaft is described in this section. Figure 10: Components of the explosion-proof drive shaft 1 Bevel gear 2 Hose clip 3 Screws 4 Telescopic protective tube 5 Coupling bracket 6 Insulator 7 Double coupling bracket 8 Square tube 9 Pin 10 Adapter ring 11 Protective cover 12 Hose clip Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 33

34 3 Product description Configuration V 1 min Intermediate bearing 34 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

35 3 Product description Distance between middle of hand crank and middle of bevel gear 706 mm When the maximum value of 2472 mm is exceeded, it is necessary to use an intermediate bearing. V mm (without intermediate bearing) V 1 > 2472 mm (with intermediate bearing) Identification plate The identification plate is on the telescopic protective tube. Figure 11: Position of the identification plate 3.4 Protective relay Function description The protective relay is used to protect the on-load tap-changer and the transformer when a malfunction occurs in the diverter switch oil compartment or selector switch oil compartment. It is tripped when the specified speed of oil flow from the on-load tap-changer head to the oil conservator is exceeded due to a fault. The flowing oil actuates the flap valve which tips over into position OFF. The contact in the dry-reed magnetic switch is thereby actuated, the circuit breakers are tripped, and the transformer is de-energized. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 35

36 3 Product description The protective relay is part of an on-load tap-changer filled with insulating liquid and its properties conform to the applicable valid version of IEC publication Diverter switch operations at rated switching capacity or at permissible overload will not cause the protective relay to trip. The protective relay responds to oil flow, not to gas accumulated in the protective relay. It is not necessary to bleed the protective relay when filling the transformer with oil. Gas accumulation in the protective relay is normal Front view Setup/versions Figure 12: RS 2001-Ex 1 Inspection window 2 Pressure equalization element Rear view Figure 13: RS 2001-Ex 1 Ground connection 2 Nameplate 36 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

37 3 Product description View from above Figure 14: RS 2001-Ex 1 Gasket 2 Potential tie-in 3 Terminal box cover 4 OPERATION (reset) test button 5 Slotted head screw for potential tie-in 7 Protective conductor connection 6 OFF (test tripping) test button 8 Protective cover with pictogram for terminal assignment 9 Dummy plug 10 Connection terminal Name plate The name plate for the explosion-protected protective relay is on the rear of the product. Figure 15: Position of name plate Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 37

38 4 Packaging, transport and storage Packaging, transport and storage Packaging The products are sometimes supplied with a sealed packaging and sometimes also dried depending on what is required. A sealed packaging surrounds the packaged goods on all sides with plastic foil. Products that have also been dried are identified by a yellow label on the sealed packaging. The information in the following sections should be applied as appropriate Suitability NOTICE Property damage due to incorrectly stacked crates! Stacking the crates incorrectly can lead to damage to the packaged goods! Only stack up to 2 equally sized crates on top of one another. Do not stack crates above a height of 1.5 m. The packaging is suitable for undamaged and fully functional means of transportation in compliance with local transportation laws and regulations. The packaged goods are packed in a stable crate. This crate ensures that when in the intended transportation position the packaged goods are stabilized to prevent impermissible changes in position, and that none of the parts touch the loading surface of the means of transport or touch the ground after unloading. A sealed packaging surrounds the packaged goods on all sides with plastic foil. The packaged goods are protected from humidity using a desiccant. The plastic foil is bonded after the drying agent is added Markings The packaging bears a signature with instructions for safe transport and correct storage. The following symbols apply to the shipment of non-hazardous goods. Adherence to these symbols is mandatory. Protect against moisture Table 10: Shipping pictograms Top Fragile Attach lifting gear here Center of mass 38 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

39 4 Packaging, transport and storage 4.2 Transportation, receipt and handling of shipments WARNING Danger of death and damage to property! Danger of death and damage to property due to tipping or falling load. Transport crate when closed only. Do not remove the mounting material used in the crate during transport. Only trained and appointed persons may select the sling gear and secure the load. Do not walk under the hanging load. Use means of transport and lifting gear with a sufficient carrying capacity in accordance with the weight stated on the delivery slip. In addition to oscillation stress and shock stress, jolts must also be expected during transportation. In order to prevent possible damage, avoid dropping, tipping, knocking over and colliding with the product. If a crate tips over, falls from a certain height (e.g. when slings tear) or experiences an unbroken fall, damage must be expected regardless of the weight. Every delivered shipment must be checked for the following by the recipient before acceptance (acknowledgment of receipt): Completeness based on the delivery slip External damage of any type. The checks must take place after unloading when the crate or transport container can be accessed from all sides. Visible damage If external transport damage is detected on receipt of the shipment, proceed as follows: Immediately record the transport damage found in the shipping documents and have this countersigned by the carrier. In the event of severe damage, total loss or high damage costs, immediately notify the sales department at Maschinenfabrik Reinhausen and the relevant insurance company. After identifying damage, do not modify the condition of the shipment further and retain the packaging material until an inspection decision has been made by the transport company or the insurance company. Record the details of the damage immediately onsite together with the carrier involved. This is essential for any claim for damages! Photograph damage to packaging and packaged goods. This also applies to signs of corrosion on the packaged goods due to moisture inside the packaging (rain, snow, condensation). NOTICE! Be absolutely sure to also check the sealed packaging. If the sealed packaging is damaged, do not under any circumstances install or commission the packaged goods. Either dry the dried packaged goods again as per the operating instructions for the relevant on-load tap- Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 39

40 4 Packaging, transport and storage changer/de-energized tap-changer or contact Maschinenfabrik Reinhausen GmbH to agree on how to proceed with drying. If this is not done, the packaged goods may be damaged. Name the damaged parts. Hidden damage When damages are not determined until unpacking after receipt of the shipment (hidden damage), proceed as follows: Make the party responsible for the damage liable as soon as possible by telephone and in writing, and prepare a damage report. Observe the time periods applicable to such actions in the respective country. Inquire about these in good time. With hidden damage, it is very hard to make the transportation company (or other responsible party) liable. Any insurance claims for such damages can only be successful if relevant provisions are expressly included in the insurance terms and conditions. 4.3 Storage of shipments Packaged goods dried by Maschinenfabrik Reinhausen Upon receipt of the shipment, immediately remove the packaged goods dried by Maschinenfabrik Reinhausen from the sealed packaging and store air-tight in dry insulating oil until used if the packaged goods were not supplied in oil. Non-dried packaged goods Non-dried packaged goods but with a functional sealed packaging can be stored outdoors when the following conditions are complied with. When selecting and setting up the storage location, ensure the following: Protect stored goods against moisture (flooding, water from melting snow and ice), dirt, pests such as rats, mice, termites and so on, and against unauthorized access. Store the crates on timber beams and planks as a protection against rising damp and for better ventilation. Ensure sufficient carrying capacity of the ground. Keep entrance paths free. Check stored goods at regular intervals. Also take appropriate action after storms, heavy rain or snow and so on. Protect the packaging foil from direct sunlight so that it does not disintegrate under the influence of UV rays, which would cause the packaging to lose its sealing function. 40 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

41 4 Packaging, transport and storage If the product is installed more than 6 months after delivery, suitable measures must be taken without delay. The following measures can be used: Correctly regenerate the drying agent and restore the sealed packaging. Unpack the packed goods and store in suitable storage space (well ventilated, as dust-free as possible, humidity < 50 % where possible). 4.4 Unpacking shipments and checking for transportation damages NOTICE! Transport the packaged crate to the place where installation will take place. Do not open the sealed packaging until just before installation. If this is not done, damage to the packaged goods may occur due to ineffectively sealed packaging. WARNING! When unpacking, check the condition of the packaged goods.secure packaged goods in an upright crate from tipping out. If this is not done, the packaged goods may be damaged and serious injuries may result. Check completeness of supplementary parts on the basis of the delivery slip. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 41

42 5 Mounting WARNING Risk of crushing from moving parts! When the on-load tap-changer undertakes a tap-change operation, components move on the selector, change-over selector, and potential connection unit, some of which are freely accessible. Reaching into the selector, change-over selector or potential connection unit during a tap-change operation may result in serious injuries. Keep at a safe distance of at least 1 m during tap-change operations. Do not reach into the selector, change-over selector, or potential connection unit during tap-change operations. Do not switch the on-load tap-changer when working on the selector, change-over selector, or potential connection unit. This chapter describes how to install the on-load tap-changer in a transformer and how to dry it, and also how to mount the protective devices and drive components. 5.1 Preparatory work Perform the work stated below before installing the on-load tap-changer in the transformer. 42 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

43 5.1.1 Fitting mounting flange on transformer cover A mounting flange is required for fitting the on-load tap-changer head on the transformer cover. This can be supplied as an option or can be produced by the customer. Mounting flanges made by the customer must comply with the installation drawings in the appendix. NOTICE! Fit mounting flange on transformer cover (pressure tight).ensure that the sealing face makes complete contact and is not damaged. Figure 16: Mounting flange Fitting stud bolts on mounting flange To attach the stud bolts to the mounting flange, use a tracing template. This can be provided upon request free of charge for the initial installation of the on-load tap-changer. 1. Place tracing template on mounting flange and use the four markings to align. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 43

44 2. Fit stud bolts on mounting flange. Figure 17: Tracing template, stud bolts 5.2 Installing the standard version on-load tap-changer in the transformer Perform the work stated below in order to install the on-load tap-changer in the transformer (standard version) Fastening on-load tap-changer to transformer cover This chapter describes how to fasten the on-load tap-changer to the transformer cover Fastening oil compartment on transformer cover 1. CAUTION! Prior to installing the on-load tap-changer, remove the red-colored packaging and transport material from the on-load tapchanger. 44 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

45 2. CAUTION! Place the oil compartment on a level surface and secure it against tipping. An unstably positioned oil compartment may tip over, resulting in serious injuries and damage. 3. Clean sealing surfaces on mounting flange and on-load tap-changer head, place oil-resistant gasket on mounting flange. Figure 18: Sealing surfaces, seal Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 45

46 4. Lift the oil compartment by hooking up the on-load tap-changer head and carefully lower the oil compartment into the cover opening of the transformer. Figure 19: Oil compartment 5. Check that the on-load tap-changer head is mounted in the position specified by the design. 46 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

47 6. Screw on-load tap-changer head to mounting flange. Figure 20: On-load tap-changer head with mounting flange 7. Remove the blocking device from the coupling of the oil compartment base. Figure 21: VACUTAP VRC/VRE, blocking strip Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 47

48 Figure 22: VACUTAP VRD/VRF, blocking plate and shackle Figure 23: VACUTAP VRG, blocking plate and shackle 48 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

49 Securing tap selector on oil compartment of the on-load tap-changer VRC/VRE 1. WARNING! Place the selector on a level surface and secure it against tipping CAUTION!. An unstably positioned selector may tip, resulting in injuries and property damage. 2. Remove plastic bag with fastening materials from the selector and keep them ready. Figure 24: Plastic bag with fastening materials 3. Remove the blocking strip from the selector coupling. Once the blocking strip is removed, the selector coupling must no longer be turned. Figure 25: Blocking strip 4. Place the selector on the lifting device. The weight of the selector is a maximum of 165 kg. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 49

50 5. NOTICE! Carefully lift selector below the oil compartment, ensuring that the tap-selector connecting leads are free when lifting the selector on the oil compartment and do not touch the compartment. Failure to comply with this instruction may result in the tap-selector connecting leads being damaged. 6. Align the position of both coupling parts and attachment points on the oil compartment and the selector with one another. The correct position of the two coupling parts is shown in the adjustment plans in the appendix. 7. Screw selector onto oil compartment. Figure 26: Selector with oil compartment Securing tap selector on oil compartment of the on-load tap-changer VRC/VRE 1. WARNING! Place the selector on a level surface and secure it against tipping CAUTION!. An unstably positioned selector may tip, resulting in injuries and property damage. 50 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

51 2. Remove plastic bag with fastening materials from the selector and keep them ready. Figure 27: Plastic bag with fastening materials 3. Remove the blocking strip from the selector coupling. Once the blocking strip is removed, the selector coupling must no longer be turned. Figure 28: Blocking strip 4. Place the selector on the lifting device. The weight of the selector is a maximum of 270 kg. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 51

52 5. Remove the ring nuts from the selector. Figure 29: Ring nut 6. NOTICE! Carefully lift selector below the oil compartment, ensuring that the tap-selector connecting leads are free when lifting the selector on the oil compartment and do not touch the compartment. Failure to comply with this instruction may result in the tap-selector connecting leads being damaged. 7. Align the position of both coupling parts and attachment points on the oil compartment and the selector with one another. The correct position of the two coupling parts is shown in the adjustment plans in the appendix. 8. Screw selector onto oil compartment. Figure 30: Selector with oil compartment 9. Remove the wooden support on the underside of the change-over selector. 52 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

53 Securing tap selector on oil compartment of the on-load tap-changer VRG 1. WARNING! Place the selector on a level surface and secure it against tipping CAUTION!. An unstably positioned selector may tip, resulting in injuries and property damage. 2. Remove plastic bag with fastening materials from the selector and keep them ready. Figure 31: Plastic bag with fastening materials 3. Remove the blocking strip from the selector coupling. Once the blocking strip is removed, the selector coupling must no longer be turned. Figure 32: Blocking strip 4. Place the selector on the lifting device. The weight of the selector is a maximum of 465 kg. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 53

54 5. Remove the ring nuts from the selector. Figure 33: Ring nut 6. NOTICE! Carefully lift selector below the oil compartment, ensuring that the tap-selector connecting leads are free when lifting the selector on the oil compartment and do not touch the compartment. Failure to comply with this instruction may result in the tap-selector connecting leads being damaged. 7. Align the position of both coupling parts and attachment points on the oil compartment and the selector with one another. The correct position of the two coupling parts is shown in the adjustment plans in the appendix. 8. Screw selector onto oil compartment. Figure 34: Selector with oil compartment 54 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

55 Connecting tap-selector connecting leads Proceed as follows to connect the tap-selector connecting leads: 1. NOTICE! Carefully screw tap-selector connecting leads to connecting piece or ring segment. Comply with specified tightening torque and secure screw connection. Failure to do so may result in damage to the onload tap-changer and transformer. 2. Attach screening caps to screw connection. Figure 35: Connecting piece Figure 36: Ring segment Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 55

56 5.2.2 Connecting the tap winding and on-load tap-changer take-off lead NOTICE Damage to the on-load tap-changer! Connecting leads which place mechanical strain on the on-load tap-changer will damage the on-load tap-changer! Establish connections carefully. Do not twist connection contacts. Connect connecting leads without warping or deforming. If necessary, use an expansion loop for connecting leads. Fit screening caps provided to screw connections. The tap winding and on-load tap-changer take-off lead must be connected in accordance with the connection diagram included with the delivery Tap selector connection contacts VRC/VRE The selector connection contacts are indicated on the selector bars, have crimped ends and a through-hole for M10 screws to allow the tap-selector connecting leads to be connected with cable shoes. The screening caps are supplied separately. In this case a locking washer must be placed below each screening cap. The M10 connection screws, the nuts, and locking washers are not included in the scope of delivery. The through-holes of the connection contacts are either horizontal or vertical, depending on the on-load tap-changer version. Figure 37: Selector connection contacts 56 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

57 Figure 38: Screening caps Selector connection contacts for multiple coarse change-over selector In the case of multiple coarse change-over selectors, take care when routing the cables for connecting to the selector connection contacts and the multiple coarse change-over selector connection contacts. These cables should be as far away as possible from neighboring connection contacts. The selector connection contacts that face both multiple coarse changeover selector columns must have at least 3 mm of paper insulation to ensure dielectric strength. NOTICE Damage to the on-load tap-changer! Tap-winding connecting leads situated too closely to the change-over selector's moving parts block the change-over selector and therefore result in onload tap-changer damage! Tap-winding connecting leads in the area of the change-over selector have to be routed such that they are at a sufficient distance from the change-over selector's moving parts. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 57

58 In this regard, please also pay attention to the dimensional drawing on which the order is based. Figure 39: Paper insulation 1 Connection from MR already has 3 mm of paper insulation p Connections to be insulated Change-over selector connection contacts for reversing change-over selector connection VRC/VRE The (+) and (-) change-over selector connection contacts are designed as connecting lugs with through-holes for M10 screws for reversing changeover selector connection. Connection contact K is designed as an extended fine tap selector connection contact (also with through-hole for M10 screws). Figure 40: Change-over selector connection contacts for reversing change-over selector connection 58 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

59 NOTICE Damage to the on-load tap-changer! Tap-winding connecting leads situated too closely to the change-over selector's moving parts block the change-over selector and therefore result in onload tap-changer damage! Tap-winding connecting leads in the area of the change-over selector have to be routed such that they are at a sufficient distance from the change-over selector's moving parts. Figure 41: Change-over selector connection contacts for reversing change-over selector connection (top view) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 59

60 Change-over selector connection contacts for coarse tap selector connection VRC/VRE With coarse tap selector connection, the (+) and (-) change-over selector connection contacts are secured to the respective laminated paper bars of the coarse change-over selector. Their external appearance is identical to the fine tap selector contacts (through-hole for M10 screws, always in vertical position). Figure 42: Change-over selector connection contacts for coarse tap selector connection NOTICE Damage to the on-load tap-changer! Tap-winding connecting leads situated too closely to the change-over selector's moving parts block the change-over selector and therefore result in onload tap-changer damage! Tap-winding connecting leads in the area of the change-over selector have to be routed such that they are at a sufficient distance from the change-over selector's moving parts. 60 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

61 Figure 43: Change-over selector connection contacts for coarse tap selector connection (top view) Selector connection contacts VRD/VRF The selector connection contacts have a through-hole for M12 screws. The screening caps are supplied separately. Figure 44: Selector connection contacts Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 61

62 Change-over selector connection contacts for reversing change-over selector connection VRD/VRF The (+) and (-) change-over selector connection contacts are designed like fine tap selector connection contacts for reversing change-over selector connections. The change-over selector connection contacts (0) are produced as terminal lugs of the crimped connecting lead (=0/K) with a through-hole for M12 screws. Figure 45: Change-over selector connection contacts for reversing change-over selector connection Change-over selector connection contacts for coarse tap selector connection VRD/VRF For coarse tap selector connection, the (0) and ( ) change-over selector connection contacts are designed like the fine tap selector connection contacts. The change-over selector connection contacts (+) are produced as terminal lugs of the crimped connecting lead (+/K) with a through-hole for M12 screws. Figure 46: Change-over selector connection contacts for coarse tap selector connection Parallel bridges for VRF I 1601/1801 Bridges for connecting the connection contacts of the fine tap selector and change-over selector in parallel in accordance with drawing will be supplied. 62 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

63 Fine-tap-selector and change-over-selector connection contacts VRG The selector connection contacts are indicated on the selector bars. The connection is made at the thread stud of the selector connection contact via cable shoes and locknuts. Every connection point must be covered by a screening cap. The screening caps are designed for lateral connection with a straight cable shoe or for front connection with an angled cable shoe. Figure 47: Tap selector connection contacts and change-over selector connection contacts Each screening cap is attached with a steel angle piece and 2 screws. The connection is secured by centre-punching at the perimeter of the screw head. The distance between the screening caps and adjacent tap-selector connecting leads must be at least 25 mm! Figure 48: Screening caps Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 63

64 Parallel bridges for VRG I 1601/1801 Bridges for connecting the connection contacts of the fine tap selector and change-over selector in parallel in accordance with drawing will be supplied Connecting on-load tap-changer take-off lead There are through-holes 13 mm in diameter at several points in the take-off ring of the oil compartment for connecting the on-load tap-changer take-off lead. Proceed as follows to connect the on-load tap-changer take-off lead: 1. Connect the on-load tap-changer take-off lead to any through-hole on the take-off ring of the oil compartment. 2. Secure screw connection. Figure 49: Take-off ring on oil compartment Carrying out transformer ratio test before drying To perform the transformer ratio test, proceed as follows: 64 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

65 NOTICE Damage to property! Damage to on-load tap-changer due to transformer ratio test being incorrectly performed! Do not perform more than 250 tap-change operations on the on-load tap-changer. If more than 250 tap-change operations are performed, completely fill oil compartment with insulating oil and lubricate sliding surfaces of contacts on selector and selector gear with insulating oil. Only switch the on-load tap-changer from one operating position to the next via the upper gear unit. You can use a short tube (diameter 25 mm) with screwed-in coupling bolt (diameter 12 mm) with a hand wheel or crank for this. When using a drill, do not exceed a maximum speed of 250 rpm. Always check the operating position reached through the inspection window in the on-load tap-changer head cover. Never overshoot the end positions, which are indicated in the connection diagram supplied with the delivery. For multiple-column applications with a shared drive, link all on-load tap-changer heads to one another with the horizontal drive shaft part. 1. Switch on-load tap-changer into the desired operating position. The diverter switch operation can be heard distinctly. When actuating the change-over selector a higher torque is required. 2. NOTICE! After operating the diverter switch, continue to crank 2.5 revolutions in the same direction on the drive shaft of the upper gear unit in order to correctly end the tap-change operation. An incomplete tapchange operation may damage the on-load tap-changer! 3. Carry out the transformer ratio test. 4. Repeat the transformer ratio test in all operating positions. 5. Once the transformer ratio test is complete, return on-load tap-changer to its adjustment position (see supplied connection diagram of the onload tap-changer). After the transformer ratio test, open the kerosene drain plug in the oil compartment if the on-load tap-changer is to be dried with kerosene in the transformer tank. After drying, the diverter switch insert must be removed, the kerosene drain plug in the oil compartment closed and the diverter switch insert refitted Measuring DC resistance on transformer Note the measurement scenarios listed below and the associated maximum measurement currents when measuring DC resistance on the transformer. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 65

66 The measurement DC current is normally restricted to 10 % of the rated current of the measured transformer winding in order to prevent the winding from overheating. Measure the DC resistance in the various on-load tap-changer operating positions. You need to distinguish here whether the measurement current is interrupted when changing operating position or not. Oil compartment empty Oil compartment filled with insulating oil Without interruption in measurement current Maximum 10 A DC Maximum 50 A DC With interruption (measurement current = 0 A before change in operating position) Maximum 50 A DC Maximum 50 A DC Table 11: Maximum permitted measurement currents when measuring DC resistance on transformer Drying on-load tap-changer in autoclave NOTICE Property damage! Damage to on-load tap-changer resulting from insufficient dielectric strength of the mineral insulating oil caused by moisture in the oil compartment. Within 10 hours of drying, seal off oil compartment with on-load tapchanger head cover. Dry on-load tap-changer using the following instructions to ensure the dielectric values assured by MR on the on-load tap-changer. If drying in an autoclave, the following methods are possible: Vacuum-drying Vapor-phase drying Vacuum-drying in the autoclave Before starting vacuum-drying in the autoclave, you must remove the onload tap-changer head cover and on-load tap-changer accessories: 1. NOTICE! Remove the on-load tap-changer head cover (24 screws M10/ wrench size 17 with safety elements) and store it outside the autoclave. If this is not done, the on-load tap-changer head cover may be damaged. 2. NOTICE! Remove on-load tap-changer accessories and store outside autoclave: motor-drive unit, drive shaft, protective relay, bevel gear, temperature sensor. If this is not done, the on-load tap-changer accessories may be damaged. 66 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

67 Vacuum-drying in the autoclave 1. Heat up the on-load tap-changer in air at atmospheric pressure with a temperature increase of about 10 C/h to a final temperature of maximum 110 C. 2. Pre-dry the on-load tap-changer in circulating air at a max. temperature of 110 C for a period of 20 hours. 3. Vacuum dry on-load tap-changer at between 105 C and maximum 125 C for at least 50 hours. 4. Residual pressure of no more than 10-3 bar Vapor-phase drying in the autoclave For vapor-phase drying in the autoclave, you must open the kerosene drain plug in the oil compartment base before drying so that the kerosene condensate can drain from the oil compartment. 1. Unscrew kerosene drain plug in base of oil compartment counter-clockwise. The kerosene drain plug cannot be unscrewed all the way. Figure 50: Kerosene drain plug 2. NOTICE! Remove the on-load tap-changer head cover (24 screws M10/ wrench size 17 with locking washers) and store it outside the autoclave. Otherwise, the on-load tap-changer head cover may be damaged. 3. NOTICE! Remove on-load tap-changer accessories and store outside autoclave: motor-drive unit, drive shaft, protective relay, bevel gear, temperature sensor. Otherwise, the on-load tap-changer accessories may be damaged. Vapor-phase drying in the autoclave 1. Supply kerosene vapor at a temperature of around 90 C. Keep this temperature constant for 3 to 4 hours. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 67

68 2. Increase the kerosene vapor temperature by approx. 10 C/hour to the desired final temperature of max. 125 C at the on-load tap-changer. 3. Vacuum dry on-load tap-changer at between 105 C and maximum 125 C for at least 50 hours. 4. Residual pressure of no more than 10-3 bar. NOTICE! Close kerosene drain plug clockwise (tightening torque 20 Nm). An open kerosene drain plug leads to oil escaping from the oil compartment and therefore to damage to the on-load tap-changer and transformer Drying on-load tap-changer in transformer tank NOTICE Property damage! Damage to on-load tap-changer resulting from insufficient dielectric strength of the mineral insulating oil caused by moisture in the oil compartment. Within 10 hours of drying, seal off oil compartment with on-load tapchanger head cover. Dry on-load tap-changer using the following instructions to ensure the dielectric values assured by MR on the on-load tap-changer. If you want to dry the on-load tap-changer in the transformer tank, first complete transformer assembly and then undertake drying. If drying in the transformer tank, the following methods are possible: Vacuum-drying Vapor-phase drying Vacuum-drying in the transformer tank To vacuum dry the on-load tap-changer in the transformer tank, proceed as follows. The on-load tap-changer head cover remains closed during the entire drying process. 1. Establish a connecting lead either between connections E2 and Q or connections E2 and R on the on-load tap-changer head. 68 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

69 2. Seal off unused pipe connections with a suitable blank cover. Figure 51: Connecting lead Vacuum-drying in the transformer tank 1. Heat up the on-load tap-changer in air at atmospheric pressure with a temperature increase of about 10 C/h to a final temperature of maximum 110 C. 2. Pre-dry the on-load tap-changer in circulating air at a max. temperature of 110 C for a period of 20 hours. 3. Vacuum dry on-load tap-changer at between 105 C and maximum 125 C for at least 50 hours. 4. Residual pressure of no more than 10-3 bar. If you wish to perform another transformer ratio test after drying, proceed as described in the section "Performing transformer ratio test following drying" Vapor-phase drying in the transformer tank If you have not opened the kerosene drain plug in advance (e.g. after the transformer ratio test), you have to open the kerosene drain plug before drying the kerosene in the transformer tank so that the kerosene condensate can drain from the oil compartment. The kerosene drain plug is located in the oil compartment base and is not generally accessible from the outside. For this reason, you first have to remove the diverter switch insert, open the kerosene drain plug, and then install the diverter switch insert again. After the drying process, you have to remove the diverter switch insert again to close the kerosene drain plug. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 69

70 NOTICE Damage to the on-load tap-changer! Damage to the on-load tap-changer and oil suction pipe due to incorrect order of installation. Strictly adhere to the order of installation. Make sure to always install the diverter switch insert before inserting the oil suction pipe into the oil compartment Removing diverter switch insert Proceed as follows to remove the diverter switch insert Moving on-load tap-changer to adjustment position Switching the on-load tap-changer into the adjustment position (see supplied connection diagram of the on-load tap-changer). Figure 52: Adjustment position WARNING Removing on-load tap-changer head cover Danger of explosion! Danger of death from explosive gases under the on-load tap-changer head cover! Ensure that there are no open flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none arise. De-energize all auxiliary circuits (for example tap-change supervisory device) before removing the on-load tap-changer head cover. Do not operate any electrical devices during the work (for example risk of sparks caused by impact wrench). Only use conductive and grounded hoses, pipes, and pump equipment that are approved for flammable liquids. 70 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

71 NOTICE Damage to the on-load tap-changer and transformer! Small parts in the oil compartment may block the diverter switch insert, thereby damaging the on-load tap-changer and transformer! Take care to avoid parts falling into the oil compartment. Check that you have the same number of small parts when disassembling and reassembling. 1. Make sure that inspection window is sealed off with cover. 2. Loosen screws with locking elements on on-load tap-changer head cover. Figure 53: On-load tap-changer head cover 3. NOTICE! Remove the on-load tap-changer head cover. Make sure that sealing surfaces on the on-load tap-changer head cover and on-load tap-changer head are in sound condition when removing and during all other work and that the o-ring is also undamaged. Damaged sealing surfaces lead to oil escaping and therefore to on-load tap-changer and transformer damage. Figure 54: On-load tap-changer head cover Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 71

72 Removing tap position indicator (version without multiple coarse change-over selector) Pull the spring clip off the shaft end and remove the tap position indicator disc. Figure 55: Tap position indicator disk Removing tap position indicator from multiple coarse change-over selector with more than 35 operating positions 1. Ensure that the red marks on the panel, tap position indicator disk and cover disk produce a continuous red line. 2. Remove countersunk head screw. Figure 56: Countersunk head screw 72 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

73 3. Lever cover disk off underlying disk with flat screwdriver and pull out position-indication disk from between panel and bracket. Figure 57: Cover disk and position-indication disk 4. Remove hexagon screws and associated lock tab. Figure 58: Lock tab 5. Pull panel and bracket up and off indicator drive shaft. Figure 59: Panel Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 73

74 NOTICE Removing the tap-change supervisory device Damage to the on-load tap-changer and transformer! Removing the tap-change monitoring unit without due care may damage it, thereby resulting in damage to the on-load tap-changer and transformer! Disconnect tap-change monitoring unit with care in order not to damage or rip out the connecting leads. 1. Take the tap-change supervisory device plug connector out of the mounting bracket and disconnect it. Figure 60: Plug connector 2. Remove nuts and locking elements (3 or 4 depending on model) on the mounting plate. Figure 61: Mounting plate 74 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

75 3. Remove tap-change supervisory device with mounting plate and drive shaft. Figure 62: Tap-change supervisory device with mounting plate and drive shaft 4. Swivel the lead of the tap-change supervisory device out of the on-load tap-changer head in direction indicated by the arrow until the cable will not be damaged when the on-load tap-changer insert is pulled out. Swiveling out the lead of the tap-change supervisory device Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 75

76 Removing the oil suction pipe 1. Remove cable ties from the oil suction pipe. Figure 63: Cable tie 2. Pull oil suction pipe out of on-load tap-changer head. Figure 64: Oil suction pipe Lifting out diverter switch insert 1. By turning the coupling tube on the upper screening ring, align it in such a manner that the triangular marks on the on-load tap-changer head and those on the coupling tube match up. Figure 65: Aligning the coupling tube 76 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

77 2. Insert the lifting gear in the eyebolts of the coupling tube and position vertically above the diverter switch insert. 3. Lift the diverter switch insert slowly and vertically out of oil compartment. Figure 66: Diverter switch insert 4. CAUTION! Place the diverter switch insert on a level surface and secure it against tipping. An unstably positioned diverter switch insert may tip, resulting in injuries and damage. 5. NOTICE! Neither operate the diverter switch insert while removed nor change the position of the tap selector coupling.otherwise, the diverter switch insert may be damaged when being reinstalled Opening kerosene drain plug NOTICE! Unscrew kerosene drain plug with extended socket wrench counter-clockwise until it starts to get hard to turn.never unscrew the kerosene drain plug all the way. Figure 67: Kerosene drain plug Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 77

78 Inserting diverter switch insert Proceed as follows to insert the diverter switch insert Inserting diverter switch insert 1. Check that all six insulating shims are present in the energy accumulator carrier. Figure 68: Insulating shim 78 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

79 2. To fit the diverter switch insert, ensure that the tap selector coupling is in the adjustment position. Figure 69: Adjustment markings in oil compartment base VACUTAP VRC/VRE Figure 70: Adjustment markings in oil compartment base VACUTAP VRD/VRF Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 79

80 Figure 71: Adjustment markings in oil compartment base VACUTAP VRG 3. Ensure that the diverter switch insert's energy accumulator is interlocked (the energy accumulator's eccentric disk is at its highest point). 4. Attach lifting gear to diverter switch insert and position diverter switch insert over oil compartment. 5. Align diverter switch insert such that the red markings at the top of the energy accumulator and on the on-load tap-changer head are opposite one another. 80 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

81 6. Slowly lower diverter switch insert until it meets the oil compartment base. Figure 72: Markings 7. Carefully press until energy accumulator carrier is in position. The shape of the tap selector coupling ensures that coupling is only possible in the correct position. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 81

82 8. Check the distance between the upper edge of the diverter switch insert coupling tube and the on-load tap-changer head flange. The distance is 10 ± 2 mm (cover mounting and bell-type tank mounting). Figure 73: Distance between the upper edge of the coupling tube and the on-load tap-changer head flange NOTICE Inserting oil suction pipe Damage to the on-load tap-changer! Damage to the on-load tap-changer and oil suction pipe due to incorrect order of installation. Strictly adhere to the order of installation. Make sure to always install the diverter switch insert before inserting the oil suction pipe into the oil compartment. 1. Insert oil suction pipe into on-load tap-changer head. Figure 74: Inserting oil suction pipe 82 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

83 2. Fasten oil suction pipe on retaining bracket with cable tie. Figure 75: Fastening the oil suction pipe Inserting the tap-change supervisory device 1. Insert tap-change supervisory device with mounting plate and drive shaft. Figure 76: Mounting plate with drive shaft Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 83

84 2. Check that drive shaft feather key is seated correctly in the groove. Figure 77: Feather key and groove 3. Secure mounting plate (3 or 4 nuts and locking elements depending on model). Figure 78: Mounting plate 4. Connect plug connector outside its bracket. Figure 79: Plug connector 84 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

85 5. Insert plug connector into the bracket. Figure 80: Plug connector in bracket Inserting the tap position indicator without multiple coarse changeover selector Due to the coupling pin, the tap position indicator disc can only be installed when in the correct position. Place tap position indicator disk on indicator drive shaft, slide spring clip on to shaft end. Figure 81: Tap position indicator disk Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 85

86 Inserting tap position indicator with multiple coarse change-over selector with more than 35 operating positions 1. Place panel with bracket on indicator drive shaft and fasten with hexagon screws and associated lock tab. Figure 82: Fitting panel 2. Insert position-indication disk horizontally between panel and bracket and fit cover disk. Align tap position indicator disc and cover disk to produce a continuous red line. Figure 83: Inserting position-indication disk 86 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

87 3. Secure cover disk with countersunk head screw. The countersunk head screw must be suitable for center-punching. Figure 84: Fastening cover disk 4. Secure countersunk head screw by center-punching Securing on-load tap-changer head cover 1. NOTICE! Place on-load tap-changer head cover on on-load tap-changer head and take care not to damage the o-ring inserted in the on-load tap-changer head cover. A damaged o-ring leads to oil escaping and therefore to damage of the on-load tap-changer. Also ensure that the red triangular marks on the on-load tap-changer head and the on-load tap-changer head cover match up. Figure 85: On-load tap-changer head cover with o-ring Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 87

88 2. Screw on-load tap-changer head cover using screws and washers. Figure 86: On-load tap-changer head cover Drying the on-load tap-changer 1. Connect pipe connections R and Q of on-load tap-changer head to the kerosene vapor lead using one shared lead. 2. Seal off unused pipe connections with a suitable blank cover. Figure 87: Shared lead Vapor-phase drying in the transformer tank 1. Supply kerosene vapor at a temperature of around 90 C. Keep this temperature constant for 3 to 4 hours. 2. Increase the kerosene vapor temperature by approx. 10 C/hour to the desired final temperature of max. 125 C at the on-load tap-changer. 3. Vacuum dry on-load tap-changer at between 105 C and maximum 125 C for at least 50 hours. 4. Residual pressure of no more than 10-3 bar Closing kerosene drain plug 1. Removing [ 70] the diverter switch insert. 2. Close kerosene drain plug with extended socket wrench by turning clockwise (tightening torque 20 Nm). 3. Inserting [ 78] the diverter switch insert. 88 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

89 If you wish to perform another transformer ratio test after drying, proceed as described in the section "Performing transformer ratio test following drying" Carrying out transformer ratio test after drying To perform the transformer ratio test, proceed as follows: NOTICE Damage to property! Damage to on-load tap-changer due to transformer ratio test being incorrectly performed! Make sure that the selector/de-energized tap changer is fully immersed in transformer oil and that the oil compartment of the on-load tapchanger is completely filled with oil. The on-load tap-changer/de-energized tap-changer can be operated in the following temperature range: - when surrounded by transformer oil: 25 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC with synthetic esters in accordance with IEC 61099: 15 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC Only switch the on-load tap-changer from one operating position to the next via the upper gear unit. You can use a short tube (diameter 25 mm) with screwed-in coupling bolt (diameter 12 mm) with a hand wheel or crank for this. When using a drill, do not exceed a maximum speed of 250 rpm. Always check the operating position reached through the inspection window in the on-load tap-changer head cover. Never overshoot the end positions, which are indicated in the connection diagram supplied with the delivery. For multiple-column applications with a shared drive, link all on-load tap-changer heads to one another using the horizontal drive shaft part. 1. Switch on-load tap-changer into the desired operating position. The diverter switch operation can be heard distinctly. When actuating the change-over selector, a higher torque is required. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 89

90 2. NOTICE! After operating the diverter switch, continue to crank 2.5 revolutions in the same direction on the drive shaft of the upper gear unit in order to correctly end the tap-change operation. An incomplete tapchange operation may damage the on-load tap-changer! 3. Carry out the transformer ratio test. 4. Repeat the transformer ratio test in all operating positions. 5. Once the transformer ratio test is complete, return on-load tap-changer to its adjustment position (see supplied connection diagram of the onload tap-changer). 5.3 Installing on-load tap-changer in transformer (bell-type tank version) The following chapters explain how to install the on-load tap-changer in the transformer Inserting on-load tap-changer into supporting structure Proceed as follows to insert the on-load tap-changer in the supporting structure: Securing tap selector on oil compartment of the on-load tap-changer VRC/VRE 1. CAUTION! Place the tap selector on a level surface and secure it against tipping. An unstably positioned tap selector may tip, resulting in serious injuries and damage. 2. Remove plastic bag with fastening materials from the tap selector and lay out. Figure 88: Plastic bag with fastening materials 90 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

91 3. Remove the blocking strip from the tap selector coupling. Once the blocking strip is removed, the tap selector coupling must no longer be turned. Figure 89: Blocking strip 4. CAUTION! Place the oil compartment on a level surface and secure it against tipping. An unstably positioned oil compartment may tip over, resulting in serious injuries and damage. 5. Remove the blocking device from the coupling of the oil compartment base. Figure 90: Blocking strip 6. Lift the oil compartment by hooking up the on-load tap-changer head and carefully raise above tap selector. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 91

92 7. Align the position of both coupling parts and attachment points on the oil compartment and the tap selector with one another. The correct position of the two coupling parts is shown in the adjustment plans in the appendix. 8. Screw tap selector onto oil compartment. Figure 91: Tap selector with oil compartment Securing tap selector on oil compartment of the on-load tap-changer VRC/VRE 1. CAUTION! Place the tap selector on a level surface and secure it against tipping. An unstably positioned tap selector may tip, resulting in serious injuries and damage. 2. Remove plastic bag with fastening materials from the tap selector and lay out. Figure 92: Plastic bag with fastening materials 92 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

93 3. Remove the ring nuts from the tap selector. Figure 93: Ring nut 4. Remove the blocking strip from the tap selector coupling. Once the blocking strip is removed, the tap selector coupling must no longer be turned. Figure 94: Blocking strip 5. CAUTION! Place the oil compartment on a level surface and secure it against tipping. An unstably positioned oil compartment may tip over, resulting in serious injuries and damage. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 93

94 6. Lift the oil compartment by hooking up the on-load tap-changer head and remove the blocking device on the coupling of the oil compartment base. Figure 95: Blocking plate and shackle 7. Carefully raise oil compartment above tap selector. 8. Align the position of both coupling parts and attachment points on the oil compartment and the tap selector with one another. The correct position of the two coupling parts is shown in the adjustment plans in the appendix. 94 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

95 9. Screw tap selector onto oil compartment. Figure 96: Tap selector with oil compartment Securing tap selector on oil compartment of the on-load tap-changer VRG 1. CAUTION! Place the tap selector on a level surface and secure it against tipping. An unstably positioned tap selector may tip, resulting in serious injuries and damage. 2. Remove plastic bag with fastening materials from the tap selector and lay out. Figure 97: Plastic bag with fastening materials Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 95

96 3. Remove the ring nuts from the tap selector. Figure 98: Ring nut 4. Remove the blocking strip from the tap selector coupling. Once the blocking strip is removed, the tap selector coupling must no longer be turned. Figure 99: Blocking strip 5. CAUTION! Place the oil compartment on a level surface and secure it against tipping. An unstably positioned oil compartment may tip over, resulting in serious injuries and damage. 96 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

97 6. Lift the oil compartment by hooking up the on-load tap-changer head and remove the blocking device on the coupling of the oil compartment base. Figure 100: Blocking plate and shackle 7. Carefully raise oil compartment above tap selector. 8. Align the position of both coupling parts and attachment points on the oil compartment and the tap selector with one another. The correct position of the two coupling parts is shown in the adjustment plans in the appendix. 9. Screw tap selector onto oil compartment. Figure 101: Tap selector with oil compartment Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 97

98 Connecting tap-selector connecting leads Proceed as follows to connect the tap-selector connecting leads: 1. NOTICE! Carefully screw tap-selector connecting leads to connecting piece or ring segment. Comply with specified tightening torque and secure screw connection. Failure to do so may result in damage to the onload tap-changer and transformer. 2. Attach screening caps to screw connection. Figure 102: Connecting piece Figure 103: Ring segment Inserting on-load tap-changer into supporting structure 1. NOTICE! Using spacers, insert on-load tap-changer vertically into supporting structure (maximum 1 deviation from the vertical) so that the on-load tap-changer reaches its final installation height and only has to be raised a maximum of 5 to 20 mm after fitting the bell-type tank. If this is not done, once the tap winding and on-load tap-changer take-off lead 98 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

99 are connected, tension may occur which will damage the on-load tapchanger and transformer. There is also a risk of malfunctions from selector contacts moving to the closing position incorrectly. Figure 104: On-load tap-changer with spacers on supporting structure 2. Remove red supports on selector base (if present). Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 99

100 3. Temporarily fasten on-load tap-changer to supporting structure. The supporting flange has through holes for this purpose. Figure 105: Fastening the on-load tap-changer Connecting the tap winding and on-load tap-changer take-off lead NOTICE Damage to the on-load tap-changer! Connecting leads which place mechanical strain on the on-load tap-changer will damage the on-load tap-changer! Establish connections carefully. Do not twist connection contacts. Connect connecting leads without warping or deforming. If necessary, use an expansion loop for connecting leads. Fit screening caps provided to screw connections. The tap winding and on-load tap-changer take-off lead must be connected in accordance with the connection diagram included with the delivery Tap selector connection contacts VRC/VRE The selector connection contacts are indicated on the selector bars, have crimped ends and a through-hole for M10 screws to allow the tap-selector connecting leads to be connected with cable shoes. The screening caps are supplied separately. In this case a locking washer must be placed below each screening cap. The M10 connection screws, the nuts, and locking washers are not included in the scope of delivery. 100 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

101 The through-holes of the connection contacts are either horizontal or vertical, depending on the on-load tap-changer version. Figure 106: Selector connection contacts Figure 107: Screening caps Selector connection contacts for multiple coarse change-over selector In the case of multiple coarse change-over selectors, take care when routing the cables for connecting to the selector connection contacts and the multiple coarse change-over selector connection contacts. These cables should be as far away as possible from neighboring connection contacts. The selector connection contacts that face both multiple coarse changeover selector columns must have at least 3 mm of paper insulation to ensure dielectric strength. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 101

102 NOTICE Damage to the on-load tap-changer! Tap-winding connecting leads situated too closely to the change-over selector's moving parts block the change-over selector and therefore result in onload tap-changer damage! Tap-winding connecting leads in the area of the change-over selector have to be routed such that they are at a sufficient distance from the change-over selector's moving parts. In this regard, please also pay attention to the dimensional drawing on which the order is based. Figure 108: Paper insulation 1 Connection from MR already has 3 mm of paper insulation p Connections to be insulated Change-over selector connection contacts for reversing change-over selector connection VRC/VRE The (+) and (-) change-over selector connection contacts are designed as connecting lugs with through-holes for M10 screws for reversing changeover selector connection. 102 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

103 Connection contact K is designed as an extended fine tap selector connection contact (also with through-hole for M10 screws). Figure 109: Change-over selector connection contacts for reversing change-over selector connection NOTICE Damage to the on-load tap-changer! Tap-winding connecting leads situated too closely to the change-over selector's moving parts block the change-over selector and therefore result in onload tap-changer damage! Tap-winding connecting leads in the area of the change-over selector have to be routed such that they are at a sufficient distance from the change-over selector's moving parts. Figure 110: Change-over selector connection contacts for reversing change-over selector connection (top view) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 103

104 Change-over selector connection contacts for coarse tap selector connection VRC/VRE With coarse tap selector connection, the (+) and (-) change-over selector connection contacts are secured to the respective laminated paper bars of the coarse change-over selector. Their external appearance is identical to the fine tap selector contacts (through-hole for M10 screws, always in vertical position). Figure 111: Change-over selector connection contacts for coarse tap selector connection NOTICE Damage to the on-load tap-changer! Tap-winding connecting leads situated too closely to the change-over selector's moving parts block the change-over selector and therefore result in onload tap-changer damage! Tap-winding connecting leads in the area of the change-over selector have to be routed such that they are at a sufficient distance from the change-over selector's moving parts. 104 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

105 Figure 112: Change-over selector connection contacts for coarse tap selector connection (top view) Selector connection contacts VRD/VRF The selector connection contacts have a through-hole for M12 screws. The screening caps are supplied separately. Figure 113: Selector connection contacts Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 105

106 Change-over selector connection contacts for reversing change-over selector connection VRD/VRF The (+) and (-) change-over selector connection contacts are designed like fine tap selector connection contacts for reversing change-over selector connections. The change-over selector connection contacts (0) are produced as terminal lugs of the crimped connecting lead (=0/K) with a through-hole for M12 screws. Figure 114: Change-over selector connection contacts for reversing change-over selector connection Change-over selector connection contacts for coarse tap selector connection VRD/VRF For coarse tap selector connection, the (0) and ( ) change-over selector connection contacts are designed like the fine tap selector connection contacts. The change-over selector connection contacts (+) are produced as terminal lugs of the crimped connecting lead (+/K) with a through-hole for M12 screws. Figure 115: Change-over selector connection contacts for coarse tap selector connection Parallel bridges for VRF I 1601/1801 Bridges for connecting the connection contacts of the fine tap selector and change-over selector in parallel in accordance with drawing will be supplied. 106 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

107 Fine-tap-selector and change-over-selector connection contacts VRG The selector connection contacts are indicated on the selector bars. The connection is made at the thread stud of the selector connection contact via cable shoes and locknuts. Every connection point must be covered by a screening cap. The screening caps are designed for lateral connection with a straight cable shoe or for front connection with an angled cable shoe. Figure 116: Tap selector connection contacts and change-over selector connection contacts Each screening cap is attached with a steel angle piece and 2 screws. The connection is secured by centre-punching at the perimeter of the screw head. The distance between the screening caps and adjacent tap-selector connecting leads must be at least 25 mm! Figure 117: Screening caps Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 107

108 Parallel bridges for VRG I 1601/1801 Bridges for connecting the connection contacts of the fine tap selector and change-over selector in parallel in accordance with drawing will be supplied Connecting on-load tap-changer take-off lead There are through-holes 13 mm in diameter at several points in the take-off ring of the oil compartment for connecting the on-load tap-changer take-off lead. Proceed as follows to connect the on-load tap-changer take-off lead: 1. Connect the on-load tap-changer take-off lead to any through-hole on the take-off ring of the oil compartment. 2. Secure screw connection. Figure 118: Take-off ring on oil compartment Carrying out transformer ratio test before drying To perform the transformer ratio test, proceed as follows: 108 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

109 NOTICE Damage to property! Damage to on-load tap-changer due to transformer ratio test being incorrectly performed! Do not perform more than 250 tap-change operations on the on-load tap-changer. If more than 250 tap-change operations are performed, completely fill oil compartment with insulating oil and lubricate sliding surfaces of contacts on selector and selector gear with insulating oil. Only switch the on-load tap-changer from one operating position to the next via the upper gear unit. You can use a short tube (diameter 25 mm) with screwed-in coupling bolt (diameter 12 mm) with a hand wheel or crank for this. When using a drill, do not exceed a maximum speed of 250 rpm. Always check the operating position reached through the inspection window in the on-load tap-changer head cover. Never overshoot the end positions, which are indicated in the connection diagram supplied with the delivery. For multiple-column applications with a shared drive, link all on-load tap-changer heads to one another with the horizontal drive shaft part. 1. Switch on-load tap-changer into the desired operating position. The diverter switch operation can be heard distinctly. When actuating the change-over selector a higher torque is required. 2. NOTICE! After operating the diverter switch, continue to crank 2.5 revolutions in the same direction on the drive shaft of the upper gear unit in order to correctly end the tap-change operation. An incomplete tapchange operation may damage the on-load tap-changer! 3. Carry out the transformer ratio test. 4. Repeat the transformer ratio test in all operating positions. 5. Once the transformer ratio test is complete, return on-load tap-changer to its adjustment position (see supplied connection diagram of the onload tap-changer). After the transformer ratio test, open the kerosene drain plug in the oil compartment if the on-load tap-changer is to be dried with kerosene in the transformer tank. After drying, the diverter switch insert must be removed, the kerosene drain plug in the oil compartment closed and the diverter switch insert refitted Measuring DC resistance on transformer Note the measurement scenarios listed below and the associated maximum measurement currents when measuring DC resistance on the transformer. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 109

110 The measurement DC current is normally restricted to 10 % of the rated current of the measured transformer winding in order to prevent the winding from overheating. Measure the DC resistance in the various on-load tap-changer operating positions. You need to distinguish here whether the measurement current is interrupted when changing operating position or not. Oil compartment empty Oil compartment filled with insulating oil Without interruption in measurement current Maximum 10 A DC Maximum 50 A DC With interruption (measurement current = 0 A before change in operating position) Maximum 50 A DC Maximum 50 A DC Table 12: Maximum permitted measurement currents when measuring DC resistance on transformer Drying on-load tap-changer in autoclave NOTICE Property damage! Damage to on-load tap-changer resulting from insufficient dielectric strength of the mineral insulating oil caused by moisture in the oil compartment. Within 10 hours of drying, seal off oil compartment with on-load tapchanger head cover. Dry on-load tap-changer using the following instructions to ensure the dielectric values assured by MR on the on-load tap-changer. If drying in an autoclave, the following methods are possible: Vacuum-drying Vapor-phase drying Vacuum-drying in the autoclave Before starting vacuum-drying in the autoclave, you must remove the onload tap-changer head cover and on-load tap-changer accessories: 1. NOTICE! Remove the on-load tap-changer head cover (24 screws M10/ wrench size 17 with safety elements) and store it outside the autoclave. If this is not done, the on-load tap-changer head cover may be damaged. 2. NOTICE! Remove on-load tap-changer accessories and store outside autoclave: motor-drive unit, drive shaft, protective relay, bevel gear, temperature sensor. If this is not done, the on-load tap-changer accessories may be damaged. 110 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

111 Vacuum-drying in the autoclave 1. Heat up the on-load tap-changer in air at atmospheric pressure with a temperature increase of about 10 C/h to a final temperature of maximum 110 C. 2. Pre-dry the on-load tap-changer in circulating air at a max. temperature of 110 C for a period of 20 hours. 3. Vacuum dry on-load tap-changer at between 105 C and maximum 125 C for at least 50 hours. 4. Residual pressure of no more than 10-3 bar Vapor-phase drying in the autoclave For vapor-phase drying in the autoclave, you must open the kerosene drain plug in the oil compartment base before drying so that the kerosene condensate can drain from the oil compartment. 1. Unscrew kerosene drain plug in base of oil compartment counter-clockwise. The kerosene drain plug cannot be unscrewed all the way. Figure 119: Kerosene drain plug 2. NOTICE! Remove the on-load tap-changer head cover (24 screws M10/ wrench size 17 with locking washers) and store it outside the autoclave. Otherwise, the on-load tap-changer head cover may be damaged. 3. NOTICE! Remove on-load tap-changer accessories and store outside autoclave: motor-drive unit, drive shaft, protective relay, bevel gear, temperature sensor. Otherwise, the on-load tap-changer accessories may be damaged. Vapor-phase drying in the autoclave 1. Supply kerosene vapor at a temperature of around 90 C. Keep this temperature constant for 3 to 4 hours. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 111

112 2. Increase the kerosene vapor temperature by approx. 10 C/hour to the desired final temperature of max. 125 C at the on-load tap-changer. 3. Vacuum dry on-load tap-changer at between 105 C and maximum 125 C for at least 50 hours. 4. Residual pressure of no more than 10-3 bar. NOTICE! Close kerosene drain plug clockwise (tightening torque 20 Nm). An open kerosene drain plug leads to oil escaping from the oil compartment and therefore to damage to the on-load tap-changer and transformer Lifting top part of on-load tap-changer head off supporting flange (bottom part) WARNING NOTICE Removing on-load tap-changer head cover Danger of explosion! Danger of death from explosive gases under the on-load tap-changer head cover! Ensure that there are no open flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none arise. De-energize all auxiliary circuits (for example tap-change supervisory device) before removing the on-load tap-changer head cover. Do not operate any electrical devices during the work (for example risk of sparks caused by impact wrench). Only use conductive and grounded hoses, pipes, and pump equipment that are approved for flammable liquids. Damage to the on-load tap-changer and transformer! Small parts in the oil compartment may block the diverter switch insert, thereby damaging the on-load tap-changer and transformer! Take care to avoid parts falling into the oil compartment. Check that you have the same number of small parts when disassembling and reassembling. 1. Make sure that inspection window is sealed off with cover. 112 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

113 2. Remove temporary fastening and spacers and slowly lower on-load tapchanger. Figure 120: Removing fastening 3. Loosen screws with locking elements on on-load tap-changer head cover. Figure 121: On-load tap-changer head cover 4. NOTICE! Remove the on-load tap-changer head cover. Make sure that sealing surfaces on the on-load tap-changer head cover and on-load tap-changer head are in sound condition when removing and during all Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 113

114 other work and that the o-ring is also undamaged. Damaged sealing surfaces lead to oil escaping and therefore to on-load tap-changer and transformer damage. Figure 122: On-load tap-changer head cover Removing tap position indicator (version without multiple coarse change-over selector) Pull the spring clip off the shaft end and remove the tap position indicator disc. Figure 123: Tap position indicator disk Removing tap position indicator from multiple coarse change-over selector with more than 35 operating positions 1. Ensure that the red marks on the panel, tap position indicator disk and cover disk produce a continuous red line. 114 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

115 2. Remove countersunk head screw. Figure 124: Countersunk head screw 3. Lever cover disk off underlying disk with flat screwdriver and pull out position-indication disk from between panel and bracket. Figure 125: Cover disk and position-indication disk 4. Remove hexagon screws and associated lock tab. Figure 126: Lock tab Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 115

116 5. Pull panel and bracket up and off indicator drive shaft. Figure 127: Panel Removing the tap-change supervisory device NOTICE Damage to the on-load tap-changer and transformer! Removing the tap-change monitoring unit without due care may damage it, thereby resulting in damage to the on-load tap-changer and transformer! Disconnect tap-change monitoring unit with care in order not to damage or rip out the connecting leads. 1. Take the tap-change supervisory device plug connector out of the mounting bracket and disconnect it. Figure 128: Plug connector 116 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

117 2. Remove nuts and locking elements (3 or 4 depending on model) on the mounting plate. Figure 129: Mounting plate 3. Remove mounting plate with tap-change supervisory device and drive shaft. Figure 130: Tap-change supervisory device with mounting plate and drive shaft Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 117

118 4. Lift the lead of the tap-change supervisory device off the spacer bolt. Figure 131: Spacer bolt and lead of the tap-change supervisory device 5. Swivel lead of the tap-change supervisory device out of the on-load tapchanger head. Figure 132: Lead of tap-change supervisory device 118 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

119 6. Remove spacer bolt with locking element. Spacer bolt Removing the oil suction pipe 1. Remove cable ties from the oil suction pipe. Figure 133: Cable tie 2. Pull oil suction pipe out of on-load tap-changer head. Figure 134: Oil suction pipe Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 119

120 3. Remove mounting bracket Figure 135: Mounting bracket Lift the top part of the on-load tap-changer head off the bottom part 1. Remove nuts and locking elements between top part and bottom part of on-load tap-changer head. Figure 136: Top part of on-load tap-changer head with nuts 120 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

121 2. Lift top part of on-load tap-changer head off bottom part. Figure 137: Top part of on-load tap-changer head Fit the bell-type tank and connect the on-load tap-changer to the top part of the on-load tap-changer head The following chapters explain how to connect the on-load tap-changer to the upper part of the on-load tap-changer head once the bell-type tank has been fitted. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 121

122 Mounting the bell-type tank 1. Clean sealing surface of supporting flange, place o-ring on supporting flange. Figure 138: Supporting flange with o-ring 2. Lift the bell-type tank over the active part of the transformer. Figure 139: Bell-type tank 122 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

123 Positioning top part of on-load tap-changer head on bell-type tank 1. Clean sealing surfaces on mounting flange and top part of on-load tapchanger head, place oil-resistant gasket on mounting flange. Figure 140: Mounting flange with gasket 1 Gasket 2 Mounting flange Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 123

124 2. Position top part of on-load tap-changer head on mounting flange so that the markings on the top part and bottom part of the on-load tapchanger head match up. Pay attention to fitted bolt in bottom part. Figure 141: Markings and fitted bolt 124 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

125 Connecting on-load tap-changer to top part of on-load tap-changer head 1. Carefully insert lifting device into the oil compartment with claws turned in. Figure 142: Lifting device 2. NOTICE! Swing claws of lifting device outwards, use lifting device to lift oil compartment. Never lift the oil compartment by the connecting screws. Make sure that the triangle markings on the top part and bottom part of the on-load tap-changer head match up so that all stud bolts in the bottom part go easily through the mounting holes of the top part. If the top part and bottom part are not properly aligned, this will damage the on-load tap-changer. Figure 143: Lifting on-load tap-changer Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 125

126 When fitting the top part and bottom part of the on-load tap-changer head together, leave the pins for the mounting plate of the tap-change supervisory device as well as the pins for the mounting bracket of the oil suction pipe (if present) free. 3. Screw the top part of the on-load tap-changer head to the bottom part below it. Figure 144: Screwing the top part of the on-load tap-changer head to the bottom part 4. Remove the lifting device with the claws turned in. Figure 145: Removing lifting device 126 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

127 5. Screw on-load tap-changer head to mounting flange. Figure 146: Screwing on-load tap-changer head to mounting flange Inserting oil suction pipe NOTICE Damage to the on-load tap-changer! Damage to the on-load tap-changer and oil suction pipe due to incorrect order of installation. Strictly adhere to the order of installation. Make sure to always install the diverter switch insert before inserting the oil suction pipe into the oil compartment. 1. Fasten the mounting bracket. Figure 147: Mounting bracket Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 127

128 2. Insert oil suction pipe into on-load tap-changer head. Figure 148: Inserting oil suction pipe 3. Fasten oil suction pipe on retaining bracket with cable tie. Figure 149: Fastening the oil suction pipe 128 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

129 Inserting the tap-change supervisory device 1. Insert mounting plate with tap-change supervisory device and drive shaft. Figure 150: Mounting plate with tap-change supervisory device and drive shaft 2. Check that drive shaft feather key is seated correctly in the groove. Figure 151: Feather key and groove Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 129

130 3. Secure mounting plate (3 or 4 nuts and locking elements depending on model). Figure 152: Mounting plate 4. Spacer bolt for fastening the lead of the tap-change supervisory device. Figure 153: Spacer bolt 130 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

131 5. Fasten lead of tap-change supervisory device to spacer bolt. Figure 154: Stud bolt with Teflon strip and nut 6. Connect plug connector outside its bracket. Figure 155: Plug connector 7. Insert plug connector into the bracket. Figure 156: Plug connector in bracket Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 131

132 Inserting the tap position indicator without multiple coarse changeover selector Due to the coupling pin, the tap position indicator disc can only be installed when in the correct position. Place tap position indicator disk on indicator drive shaft, slide spring clip on to shaft end. Figure 157: Tap position indicator disk Inserting tap position indicator with multiple coarse change-over selector with more than 35 operating positions 1. Place panel with bracket on indicator drive shaft and fasten with hexagon screws and associated lock tab. Figure 158: Fitting panel 132 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

133 2. Insert position-indication disk horizontally between panel and bracket and fit cover disk. Align tap position indicator disc and cover disk to produce a continuous red line. Figure 159: Inserting position-indication disk 3. Secure cover disk with countersunk head screw. The countersunk head screw must be suitable for center-punching. Figure 160: Fastening cover disk 4. Secure countersunk head screw by center-punching Securing on-load tap-changer head cover 1. NOTICE! Place on-load tap-changer head cover on on-load tap-changer head and take care not to damage the o-ring inserted in the on-load tap-changer head cover. A damaged o-ring leads to oil escaping and Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 133

134 therefore to damage of the on-load tap-changer. Also ensure that the red triangular marks on the on-load tap-changer head and the on-load tap-changer head cover match up. Figure 161: On-load tap-changer head cover with o-ring 2. Screw on-load tap-changer head cover using screws and washers. Figure 162: On-load tap-changer head cover Drying on-load tap-changer in transformer tank NOTICE Property damage! Damage to on-load tap-changer resulting from insufficient dielectric strength of the mineral insulating oil caused by moisture in the oil compartment. Within 10 hours of drying, seal off oil compartment with on-load tapchanger head cover. Dry on-load tap-changer using the following instructions to ensure the dielectric values assured by MR on the on-load tap-changer. If you want to dry the on-load tap-changer in the transformer tank, first complete transformer assembly and then undertake drying. 134 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

135 If drying in the transformer tank, the following methods are possible: Vacuum-drying Vapor-phase drying Vacuum-drying in the transformer tank To vacuum dry the on-load tap-changer in the transformer tank, proceed as follows. The on-load tap-changer head cover remains closed during the entire drying process. 1. Establish a connecting lead either between connections E2 and Q or connections E2 and R on the on-load tap-changer head. 2. Seal off unused pipe connections with a suitable blank cover. Figure 163: Connecting lead Vacuum-drying in the transformer tank 1. Heat up the on-load tap-changer in air at atmospheric pressure with a temperature increase of about 10 C/h to a final temperature of maximum 110 C. 2. Pre-dry the on-load tap-changer in circulating air at a max. temperature of 110 C for a period of 20 hours. 3. Vacuum dry on-load tap-changer at between 105 C and maximum 125 C for at least 50 hours. 4. Residual pressure of no more than 10-3 bar. If you wish to perform another transformer ratio test after drying, proceed as described in the section "Performing transformer ratio test following drying". Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 135

136 Vapor-phase drying in the transformer tank If you have not opened the kerosene drain plug in advance (e.g. after the transformer ratio test), you have to open the kerosene drain plug before drying the kerosene in the transformer tank so that the kerosene condensate can drain from the oil compartment. The kerosene drain plug is located in the oil compartment base and is not generally accessible from the outside. For this reason, you first have to remove the diverter switch insert, open the kerosene drain plug, and then install the diverter switch insert again. After the drying process, you have to remove the diverter switch insert again to close the kerosene drain plug. NOTICE Damage to the on-load tap-changer! Damage to the on-load tap-changer and oil suction pipe due to incorrect order of installation. Strictly adhere to the order of installation. Make sure to always install the diverter switch insert before inserting the oil suction pipe into the oil compartment Removing diverter switch insert Proceed as follows to remove the diverter switch insert Moving on-load tap-changer to adjustment position Switching the on-load tap-changer into the adjustment position (see supplied connection diagram of the on-load tap-changer). Figure 164: Adjustment position 136 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

137 WARNING NOTICE Removing on-load tap-changer head cover Danger of explosion! Danger of death from explosive gases under the on-load tap-changer head cover! Ensure that there are no open flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none arise. De-energize all auxiliary circuits (for example tap-change supervisory device) before removing the on-load tap-changer head cover. Do not operate any electrical devices during the work (for example risk of sparks caused by impact wrench). Only use conductive and grounded hoses, pipes, and pump equipment that are approved for flammable liquids. Damage to the on-load tap-changer and transformer! Small parts in the oil compartment may block the diverter switch insert, thereby damaging the on-load tap-changer and transformer! Take care to avoid parts falling into the oil compartment. Check that you have the same number of small parts when disassembling and reassembling. 1. Make sure that inspection window is sealed off with cover. 2. Loosen screws with locking elements on on-load tap-changer head cover. Figure 165: On-load tap-changer head cover 3. NOTICE! Remove the on-load tap-changer head cover. Make sure that sealing surfaces on the on-load tap-changer head cover and on-load tap-changer head are in sound condition when removing and during all Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 137

138 other work and that the o-ring is also undamaged. Damaged sealing surfaces lead to oil escaping and therefore to on-load tap-changer and transformer damage. Figure 166: On-load tap-changer head cover Removing tap position indicator (version without multiple coarse change-over selector) Pull the spring clip off the shaft end and remove the tap position indicator disc. Figure 167: Tap position indicator disk Removing tap position indicator from multiple coarse change-over selector with more than 35 operating positions 1. Ensure that the red marks on the panel, tap position indicator disk and cover disk produce a continuous red line. 138 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

139 2. Remove countersunk head screw. Figure 168: Countersunk head screw 3. Lever cover disk off underlying disk with flat screwdriver and pull out position-indication disk from between panel and bracket. Figure 169: Cover disk and position-indication disk 4. Remove hexagon screws and associated lock tab. Figure 170: Lock tab Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 139

140 5. Pull panel and bracket up and off indicator drive shaft. Figure 171: Panel NOTICE Removing the tap-change supervisory device Damage to the on-load tap-changer and transformer! Removing the tap-change monitoring unit without due care may damage it, thereby resulting in damage to the on-load tap-changer and transformer! Disconnect tap-change monitoring unit with care in order not to damage or rip out the connecting leads. 1. Take the tap-change supervisory device plug connector out of the mounting bracket and disconnect it. Figure 172: Plug connector 140 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

141 2. Remove nuts and locking elements (3 or 4 depending on model) on the mounting plate. Figure 173: Mounting plate 3. Remove tap-change supervisory device with mounting plate and drive shaft. Figure 174: Tap-change supervisory device with mounting plate and drive shaft Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 141

142 4. Swivel the lead of the tap-change supervisory device out of the on-load tap-changer head in direction indicated by the arrow until the cable will not be damaged when the on-load tap-changer insert is pulled out. Swiveling out the lead of the tap-change supervisory device Removing the oil suction pipe 1. Remove cable ties from the oil suction pipe. Figure 175: Cable tie 2. Pull oil suction pipe out of on-load tap-changer head. Figure 176: Oil suction pipe 142 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

143 Lifting out diverter switch insert 1. By turning the coupling tube on the upper screening ring, align it in such a manner that the triangular marks on the on-load tap-changer head and those on the coupling tube match up. Figure 177: Aligning the coupling tube 2. Insert the lifting gear in the eyebolts of the coupling tube and position vertically above the diverter switch insert. 3. Lift the diverter switch insert slowly and vertically out of oil compartment. Figure 178: Diverter switch insert 4. CAUTION! Place the diverter switch insert on a level surface and secure it against tipping. An unstably positioned diverter switch insert may tip, resulting in injuries and damage. 5. NOTICE! Neither operate the diverter switch insert while removed nor change the position of the tap selector coupling.otherwise, the diverter switch insert may be damaged when being reinstalled. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 143

144 Opening kerosene drain plug NOTICE! Unscrew kerosene drain plug with extended socket wrench counter-clockwise until it starts to get hard to turn.never unscrew the kerosene drain plug all the way. Figure 179: Kerosene drain plug Inserting diverter switch insert Proceed as follows to insert the diverter switch insert. 144 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

145 Inserting diverter switch insert 1. Check that all six insulating shims are present in the energy accumulator carrier. Figure 180: Insulating shim Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 145

146 2. To fit the diverter switch insert, ensure that the tap selector coupling is in the adjustment position. Figure 181: Adjustment markings in oil compartment base VACUTAP VRC/VRE Figure 182: Adjustment markings in oil compartment base VACUTAP VRD/VRF 146 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

147 Figure 183: Adjustment markings in oil compartment base VACUTAP VRG 3. Ensure that the diverter switch insert's energy accumulator is interlocked (the energy accumulator's eccentric disk is at its highest point). 4. Attach lifting gear to diverter switch insert and position diverter switch insert over oil compartment. 5. Align diverter switch insert such that the red markings at the top of the energy accumulator and on the on-load tap-changer head are opposite one another. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 147

148 6. Slowly lower diverter switch insert until it meets the oil compartment base. Figure 184: Markings 7. Carefully press until energy accumulator carrier is in position. The shape of the tap selector coupling ensures that coupling is only possible in the correct position. 148 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

149 8. Check the distance between the upper edge of the diverter switch insert coupling tube and the on-load tap-changer head flange. The distance is 10 ± 2 mm (cover mounting and bell-type tank mounting). Figure 185: Distance between the upper edge of the coupling tube and the on-load tap-changer head flange NOTICE Inserting oil suction pipe Damage to the on-load tap-changer! Damage to the on-load tap-changer and oil suction pipe due to incorrect order of installation. Strictly adhere to the order of installation. Make sure to always install the diverter switch insert before inserting the oil suction pipe into the oil compartment. 1. Insert oil suction pipe into on-load tap-changer head. Figure 186: Inserting oil suction pipe Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 149

150 2. Fasten oil suction pipe on retaining bracket with cable tie. Figure 187: Fastening the oil suction pipe Inserting the tap-change supervisory device 1. Insert tap-change supervisory device with mounting plate and drive shaft. Figure 188: Mounting plate with drive shaft 150 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

151 2. Check that drive shaft feather key is seated correctly in the groove. Figure 189: Feather key and groove 3. Secure mounting plate (3 or 4 nuts and locking elements depending on model). Figure 190: Mounting plate 4. Connect plug connector outside its bracket. Figure 191: Plug connector Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 151

152 5. Insert plug connector into the bracket. Figure 192: Plug connector in bracket Inserting the tap position indicator without multiple coarse changeover selector Due to the coupling pin, the tap position indicator disc can only be installed when in the correct position. Place tap position indicator disk on indicator drive shaft, slide spring clip on to shaft end. Figure 193: Tap position indicator disk 152 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

153 Inserting tap position indicator with multiple coarse change-over selector with more than 35 operating positions 1. Place panel with bracket on indicator drive shaft and fasten with hexagon screws and associated lock tab. Figure 194: Fitting panel 2. Insert position-indication disk horizontally between panel and bracket and fit cover disk. Align tap position indicator disc and cover disk to produce a continuous red line. Figure 195: Inserting position-indication disk Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 153

154 3. Secure cover disk with countersunk head screw. The countersunk head screw must be suitable for center-punching. Figure 196: Fastening cover disk 4. Secure countersunk head screw by center-punching Securing on-load tap-changer head cover 1. NOTICE! Place on-load tap-changer head cover on on-load tap-changer head and take care not to damage the o-ring inserted in the on-load tap-changer head cover. A damaged o-ring leads to oil escaping and therefore to damage of the on-load tap-changer. Also ensure that the red triangular marks on the on-load tap-changer head and the on-load tap-changer head cover match up. Figure 197: On-load tap-changer head cover with o-ring 154 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

155 2. Screw on-load tap-changer head cover using screws and washers. Figure 198: On-load tap-changer head cover Drying the on-load tap-changer 1. Connect pipe connections R and Q of on-load tap-changer head to the kerosene vapor lead using one shared lead. 2. Seal off unused pipe connections with a suitable blank cover. Figure 199: Shared lead Vapor-phase drying in the transformer tank 1. Supply kerosene vapor at a temperature of around 90 C. Keep this temperature constant for 3 to 4 hours. 2. Increase the kerosene vapor temperature by approx. 10 C/hour to the desired final temperature of max. 125 C at the on-load tap-changer. 3. Vacuum dry on-load tap-changer at between 105 C and maximum 125 C for at least 50 hours. 4. Residual pressure of no more than 10-3 bar Closing kerosene drain plug 1. Removing [ 136] the diverter switch insert. 2. Close kerosene drain plug with extended socket wrench by turning clockwise (tightening torque 20 Nm). 3. Inserting [ 144] the diverter switch insert. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 155

156 If you wish to perform another transformer ratio test after drying, proceed as described in the section "Performing transformer ratio test following drying" Carrying out transformer ratio test after drying To perform the transformer ratio test, proceed as follows: NOTICE Damage to property! Damage to on-load tap-changer due to transformer ratio test being incorrectly performed! Make sure that the selector/de-energized tap changer is fully immersed in transformer oil and that the oil compartment of the on-load tapchanger is completely filled with oil. The on-load tap-changer/de-energized tap-changer can be operated in the following temperature range: - when surrounded by transformer oil: 25 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC with synthetic esters in accordance with IEC 61099: 15 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC Only switch the on-load tap-changer from one operating position to the next via the upper gear unit. You can use a short tube (diameter 25 mm) with screwed-in coupling bolt (diameter 12 mm) with a hand wheel or crank for this. When using a drill, do not exceed a maximum speed of 250 rpm. Always check the operating position reached through the inspection window in the on-load tap-changer head cover. Never overshoot the end positions, which are indicated in the connection diagram supplied with the delivery. For multiple-column applications with a shared drive, link all on-load tap-changer heads to one another using the horizontal drive shaft part. 1. Switch on-load tap-changer into the desired operating position. The diverter switch operation can be heard distinctly. When actuating the change-over selector, a higher torque is required. 156 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

157 2. NOTICE! After operating the diverter switch, continue to crank 2.5 revolutions in the same direction on the drive shaft of the upper gear unit in order to correctly end the tap-change operation. An incomplete tapchange operation may damage the on-load tap-changer! 3. Carry out the transformer ratio test. 4. Repeat the transformer ratio test in all operating positions. 5. Once the transformer ratio test is complete, return on-load tap-changer to its adjustment position (see supplied connection diagram of the onload tap-changer). 5.4 Filling the oil compartment of the on-load tap-changer with oil After drying, completely fill the oil compartment (diverter switch insert fitted) with oil again as soon as possible so that an impermissible amount of humidity is not absorbed from the surroundings. When filling the oil compartment and its oil conservator, use only new mineral insulating oil for transformers in accordance with IEC (Specification for unused mineral insulating oils for transformers and switchgear). 1. Establish a connecting lead between the pipe connection E2 and one of the pipe connections R, S or Q to ensure equal pressure during evacuation in the oil compartment and transformer. Figure 200: Connecting lead between E2 and Q. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 157

158 2. Fill on-load tap-changer with oil using one of the remaining pipe connections of the on-load tap-changer head. Figure 201: Pipe connection S and R 5.5 Fitting protective devices and drive components Connecting the tap-change supervisory device DANGER Risk of fatal injury due to electrical voltage! Danger of death due to electrical voltage when assembling and connecting the device. De-energize the device and system peripherals and lock them to prevent them from being switched back on. Connect monitoring contacts integrated into the on-load tap-changer head (terminal box on pipe connection Q) to the motor-drive unit terminals as specified in the connection diagram provided. 158 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

159 5.5.2 Installing protective relay in piping and connecting WARNING Danger of death or severe injury! Danger of death or severe injury from explosive gases in the protective relay, which accumulate during on-load tap-changer operation! Wait 15 minutes after switching off the transformer before you begin further work on the protective relay so that the gases have a chance to volatize. Ensure that there are no naked flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none occur. De-energize all auxiliary circuits before starting the work. Do not operate any electrical devices during the work (for example risk of sparks caused by impact wrench). Always perform all transformer tests with the protective relay attached and connected Checking function of protective relay Check the function of the protective relay before installing in piping between on-load tap-changer head and oil conservator. 1. Open terminal box. Figure 202: Protective relay with open terminal box NOTICE Damage to protective relay! Damage to protective relay resulting from improper operation! Never press both test buttons at the same time. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 159

160 2. Press OFF test button. ð Flap valve is inclined. The red indicator is not visible. Figure 203: OFF position 3. Press OPERATION test button. ð Flap valve is vertical. The red indicator appears in the viewing window. Figure 204: OPERATION position 160 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

161 4. Close terminal box. Figure 205: Closing terminal box The associated contact positions for checking electrical continuity can be seen in dimensional drawing provided and on the protective cover Installing protective relay in piping The following requirements must be satisfied in order to install the protective relay in the piping: The piping must be free of dirt and foreign bodies before the protective relay is installed. The pipes from the protective relay to the oil conservator must be routed with an inclination of at least 2 % to ensure the switching gases can escape freely. The inner piping diameter must be at least 25 mm. The magnetic field strength (bushings, busbars etc.) must be < 20 ka/m. Install protective relay with good support and free from vibrations. The test buttons must be at the top. The reference arrow on the terminal box cover must indicate the direction in which the insulating oil flows from the on-load tap-changer to the oil conservator. Install protective relay such that it can be easily accessed for subsequent maintenance work. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 161

162 Figure 206: Piping with inclination of at least 2 % 162 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

163 Figure 207: Protective relay with test button at the top Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 163

164 Figure 208: Reference arrow pointing towards the on-load tap-changer's oil conservator 1. Install the protective relay horizontally in the pipe between on-load tapchanger head and oil conservator as near as possible to the on-load tap-changer head taking the above points into consideration. 164 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

165 2. Provide a stop-cock (nominal width of at least 25 mm) between protective relay and oil conservator. Figure 209: Stop-cock Installing electrics for protective relay The protective relay's dry-reed magnetic switch is supplied as either an NC or NO contact in the following variants: 2 x NC contact 2 x NO contact 1 x NC contact and 1x NO contact When making the electrical connection for the protective relay, proceed as follows. 1. Connect protective conductor with cable cross-section of 1 4 mm 2 to cylinder head screw. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 165

166 2. Take off MR dummy plug. Figure 210: Dummy plug 1 Dummy plug 3. Insert explosion-certified cable bushing into tapped hole on side of terminal box. 4. Open terminal box. Figure 211: Terminal box 166 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

167 5. Loosen screw, remove terminal box cover, and take off protective cover. Figure 212: Terminal box cover and protective cover 6. Guide explosion-certified cable through cable bushing and into protective relay. Ensure that the cable connection is well secured and sealed. WARNING Risk of severe injury or death! Danger of death and severe injury due to unprofessional electrical connection of protective relay. Connect the protective relay into the tripping circuit of the circuit breakers of the transformer to be protected so that the transformer is immediately de-energized by the circuit breakers when the protective relay is tripped. Systems which only generate an alarm message are not permitted. 7. Connect electric cables with cable cross-section of 1 4 mm 2 to connection terminals in accordance with connection diagram. 8. Insert protective cover. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 167

168 9. Secure terminal box cover. Figure 213: Terminal box cover 10. Close terminal box. Figure 214: Terminal box cover Fitting motor-drive unit Fit motor-drive unit to transformer as described in relevant MR operating instructions for motor-drive unit. Fitting drive shaft Observe the following during mounting: 168 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

169 NOTICE Damage to drive and on-load tap-changer or de-energized tapchanger! Trouble-free operation of the drive and the on-load tap-changer or de-energized tap-changer cannot be guaranteed. The shaft ends to be connected must be exactly aligned. Permitted axial displacement Minor axial displacement can be tolerated as long as it does not exceed 35 mm per 1,000 mm square tube length (that corresponds to 2 ). Figure 215: Permitted maximum axial displacement of vertical drive shaft Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 169

170 Figure 216: Permitted maximum axial displacement of horizontal drive shaft Resistance to corrosion of components Square tubes, coupling brackets, coupling bolts, screws, and locking washers are corrosion-resistant. We therefore recommend not applying the same external coating to these parts as to the transformer tank. Cutting square tubes, telescopic protective tubes, and protective cover The square tubes, telescopic protective tubes, and protective cover are supplied in overlengths (graded standard lengths). You must cut these parts to the required size before mounting on the transformer. In rare cases, you also have to cut the inner tube of the telescopic protective tube to the desired length. The maximum total drive shaft length of the drive - last column = 15 m. Standard lengths ,300 1,700 Ex TAPMOTION ED Table 13: Graded standard lengths of square tubes for explosion-proof motor-drive unit TAPMOTION ED-Ex 170 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

171 Fitting vertical drive shaft with insulator To fit the vertical drive shaft, proceed as follows. 1. CAUTION! Switch off motor protective switch Q1 in the motor-drive unit (position O). If this is not done, the motor-drive unit may be started by accident and thereby cause injuries. 2. Screw down the bevel gear for fastening on the transformer on both sides with the contact washers provided to ensure permanent grounding. Screws are not included in the scope of supply. Figure 217: Bevel gear Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 171

172 3. Determine dimension A between shaft end of drive and shaft end of bevel gear. Shorten square tube to length of A 179 mm taking the insulator into account. Figure 218: Shortening square tube 172 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

173 4. Deburr cut surfaces of square tube. Figure 219: Deburring cut surfaces 5. Screw down double coupling bracket with insulator supplied and square tube. Mount insulator on the side facing the drive. Figure 220: Screwing down square tube and insulator with double coupling part Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 173

174 6. Slide loosely screwed together coupling part onto insulator until stop is reached. Figure 221: Slide coupling part onto insulator 7. Insert coupling bolt into shaft end of drive. Grease coupling part, coupling bolt and shaft end (e.g. ISOFLEX TOPAS L32). Slide square tube with coupling part onto shaft end. Figure 222: Slide square tube with coupling part onto shaft end 174 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

175 8. Secure square tube onto drive. Figure 223: Secure square tube onto drive 9. Pivoting square tube. Figure 224: Pivoting square tube 10. When installing inner tube of telescopic protective tube, if necessary shorten on side without slits. The minimum dimension for overlapping the two protective tubes is 100 mm. Inner tube must not be deformed and must be deburred in order to slide easily in the outer tube. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 175

176 Figure 225: Deburring inner tube Dimension A (= distance between shaft end of drive and shaft end of bevel gear) Inner tube Outer tube 170 mm mm Shorten to 200 mm = 200 mm 191 mm mm Dimension A + 20 mm = 200 mm 1131 mm mm = 700 mm = 1150 mm 1599 mm mm = 1150 mm = 1150 mm 176 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

177 11. For the separate grounding with 110 mm spacing (viewed from slotted side), drill a 11 mm diameter hole in the inner tube. Figure 226: Producing grounding hole on telescopic protective tube Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 177

178 12. Slide outer tube over inner tube. When doing so, make sure that the unslotted side of the inner tube is facing up. Slide telescopic protective tube onto square tube Then slide hose clips over telescopic protective tube. Figure 227: Sliding on telescopic protective tube 178 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

179 13. Place adapter ring over bearing collar of bevel gear and slide upwards. Insert coupling bolt into shaft end of bevel gear. Swing square tube in. Figure 228: Fitting adapter ring and coupling bolt Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 179

180 14. Grease coupling brackets, coupling bolt and shaft end (e.g. ISOFLEX TOPAS L32) and secure square tube with coupling brackets on the bevel gear. Set a unilateral axial clearance of 3 mm between coupling bolt and upper coupling piece. Figure 229: Mounting coupling brackets 180 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

181 15. Use grounding line and supplied screw with contact washers to establish connection between bottom protective tube (inner tube) and functional ground. Due to the risk of collision with the screw head, fit the fixing screw for the grounding line from the inside. Figure 230: Screwing down grounding line on telescopic protective tube Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 181

182 16. Attach bottom protective tube (inner tube) with a hose clip to bearing collar of drive. Then slide upper protective tube (outer tube) over adapter on bevel gear. Secure upper protective tube to second hose clip both at top end. Figure 231: Mounting protective tube 182 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

183 17. Drill two holes (4.5 mm in diameter) in the two tubes; roughly in the center and offset by 180. Then screw in the two tapping screws provided and lock the protective tubes against one another to produce a galvanic connection. Figure 232: Screwing in tapping screws Fitting horizontal drive shaft with insulator Aligning upper gear unit on the on-load tap-changer head In order to correctly install the horizontal drive shaft, under certain circumstances you may have to first align the upper gear unit such that the horizontal drive shaft is flush with the shaft end of the upper gear unit. Proceed as follows: 1. NOTICE! Make sure the oil compartment is filled completely with oil. Aligning the gear unit after drying without filling the oil compartment completely with oil will damage the on-load tap-changer. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 183

184 2. Loosen screws and turn pressure ring segments to one side. Figure 233: Pressure ring segments 3. NOTICE! Align gear unit such that the horizontal drive shaft is flush with the drive shaft of the gear unit. While aligning the gear unit, turn the unit's drive shaft such that its output shaft retains its original position. Failure to do so may result in damage to the de-energized tap-changer and transformer when starting up. Figure 234: Aligning gear unit 184 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

185 4. Swivel pressure ring segments back towards gear unit and tighten screws. Ensure that the spring washer is between the screw head and pressure ring segment and that the pressure ring segments are firmly in contact with the gear unit housing. Figure 235: Securing pressure ring segments Fitting horizontal drive shaft To mount the horizontal drive shaft, proceed as follows: 1. Calculate dimension A between shaft end of upper gear unit and shaft end of bevel gear and shorten square tube to length A 179 mm taking insulator into account. Figure 236: Shortening square tube Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 185

186 2. Calculate inside width B between housings of upper gear unit and bevel gear. Cut down the protective cover to B-2 mm and deburr the cuts. Figure 237: Shortening and deburring protective cover 3. For the separate grounding with 110 mm spacing from the bevel gear, drill a 11 mm diameter hole in the protective cover. Protect protective cover against corrosion with a coat of paint. Figure 238: Producing grounding hole on protective cover 186 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

187 4. Screw down double coupling bracket with insulator supplied and square tube. Mount insulator on the side facing the bevel gear. Figure 239: Screwing down square tube and insulator with double coupling part 5. Slide loosely screwed together coupling part onto insulator until stop is reached. Figure 240: Coupling parts Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 187

188 6. Grease coupling bolt, coupling part and shaft end of the bevel gear (e.g. ISOFLEX TOPAS L32) and insert coupling bolt into shaft end. Thread hose clip onto square tube and slide square tube with coupling part onto shaft end. Figure 241: Slide square tube with coupling part onto shaft end 7. Secure square tube onto bevel gear. Figure 242: Secure square tube on bevel gear 188 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

189 8. Grease coupling bolt, coupling brackets and shaft end of the upper gear unit (e.g. ISOFLEX TOPAS L32) and insert coupling bolt into shaft end. Secure square tube with coupling brackets on upper gear unit. Figure 243: Secure square tube on upper gear unit. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 189

190 9. Attach shortened protective cover to housing lugs on the on-load tapchanger head and bevel gear. Secure each end of protective cover with a hose clip. Figure 244: Fitting protective cover 190 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

191 10. Use grounding line and supplied screw with contact washers to establish connection between protective cover and functional ground. Due to the risk of collision with the screw head, fit the fixing screw for the grounding line from the inside. Figure 245: Screwing down grounding line of protective cover On-load tap-changer sets and combinations For two-column and three-column on-load tap-changer models, you must couple the on-load tap-changer heads above the transformer cover. Proceed as follows: 1. Check that the operating positions of all on-load tap-changers are identical (inspection window in the on-load tap-changer head). Each on-load tap-changer must be in the adjustment position. 2. Turn the pressure segments of upper gear units to one side by loosening the 6 M8 bolts/wrench size NOTICE! Move upper gear units into the required installation position only by turning the drive shafts of the upper gear units with loosened pressure segments. Otherwise, the on-load tap-changer may be damaged when aligning the upper gear unit. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 191

192 4. Swivel pressure segments back towards gear unit and tighten screws (15 Nm tightening torque). Ensure that the spring washer is between the screw head and pressure ring segment and that the pressure ring segments are firmly in contact with the gear unit housing. 5. Note arrow on drive shaft flange under the stamped serial number. The direction of the arrow indicates the direction of rotation when turning the hand crank of the motor-drive unit clockwise and must be identical for all gear units. 6. Move each on-load tap-changer separately one step by rotating the shaft ends counter-clockwise until the on-load tap-changer operates once. 7. Check that the operating positions of all on-load tap-changer heads are the same. 8. Fit horizontal drive shaft between the on-load tap-changer heads. Individually couple each on-load tap-changer. Start with the on-load tapchanger which is closest to the motor-drive unit. 9. NOTICE! After installing all drive shafts, continue cranking another 2.5 revolutions counter-clockwise on the drive shaft of the upper gear unit to correctly complete the tap-change operation. An incomplete tap-change operation may damage the on-load tap-changer! 10. Switch on-load tap-changer back into adjustment position by turning drive shaft clockwise. Once the adjustment position has been reached and the diverter switch has undergone the tap-change operation, continue cranking another 2.5 revolutions clockwise on the drive shaft of the upper gear unit to correctly complete the tap-change operation. 11. Check operation of all on-load tap-changers. A slight time delay is permitted. 12. Check that the operating positions of all on-load tap-changer heads are the same. 13. Fit vertical drive shaft Centering on-load tap-changer and motor-drive unit Center on-load tap-changer and motor-drive unit as described in relevant MR operating instructions for motor-drive unit Installing electrics for motor-drive unit Install electrics for motor-drive unit as described in relevant MR operating instructions for motor-drive unit. 192 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

193 6 Commissioning the on-load tap-changer at the transformer manufacturer's site 6 Commissioning the on-load tap-changer at the transformer manufacturer's site WARNING Flying debris and spraying of hot oil resulting from on-load tapchanger overload! The on-load tap-changer can switch currents of up to 1.5 times the rated through current. Higher currents occur when activating transformers (inrush current impulse) or in the event of short-circuits, for example. Higher voltages may occur from transformer overexcitation following load shedding, for example. Danger of death or severe injury from flying debris and spraying of hot oil! Ensure that the on-load tap-changer is not overloaded. Prevent on-load tap-change operations if higher currents arise. Ensure that the rated step voltage is not exceeded. The rated step voltage may be briefly exceeded by up to 10 % as long as the rated through current is not exceeded. Ensure that the temperature limit values stated in the technical data are not exceeded. Perform the following work and functional checks before commissioning the transformer. 6.1 Bleeding on-load tap-changer head and suction pipe Before first commissioning, the on-load tap-changer head and the suction pipe on pipe connection S must be bled Bleeding on-load tap-changer head 1. Open all forward and return valves in the pipe system. 2. Remove screw cap on air-vent valve E1 on the on-load tap-changer head cover. Figure 246: Screw cap Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 193

194 6 Commissioning the on-load tap-changer at the transformer manufacturer's site 3. Use screwdriver to lift valve tappet on air-vent valve E1 and bleed onload tap-changer head. Figure 247: Valve tappet 4. Seal air-vent valve E1 with screw cap (tightening torque 10 Nm) Bleeding suction pipe on pipe connection S 1. Remove screw cap from pipe connection S. Figure 248: Screw cap 2. NOTICE! Open vent screw and bleed suction pipe. Make sure the suction pipe is fully vented. The insulation capability of the on-load tapchanger to ground will otherwise be significantly impaired. 3. Close vent screw. 4. Seal vent screw with screw cap. 6.2 Grounding the on-load tap-changer Ground the on-load tap-changer. To do this, only connect the earthing terminal on the on-load tap-changer head with the transformer cover. 194 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

195 6 Commissioning the on-load tap-changer at the transformer manufacturer's site If necessary, reduce the stated tightening torque according to the grounding line used. Figure 249: Earthing terminal on on-load tap-changer head Ground motor-drive unit. To do this, only connect the motor-drive unit's ground connection with protection against twisting with the transformer's ground connection. If necessary, reduce the stated tightening torque according to the grounding line used. Figure 250: Grounding screw on motor-drive unit Connect housing of temperature sensor with grounding screw on onload tap-changer head. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 195

196 6 Commissioning the on-load tap-changer at the transformer manufacturer's site 6.3 Performing tests on motor-drive unit Function tests Perform function checks as described in relevant MR operating instructions for motor-drive unit. Dielectric tests on transformer wiring Note information relating to dielectric tests on transformer wiring in relevant MR operating instructions for motor-drive unit. 6.4 Performing trial tap-change operations Before you energize the transformer, you must carry out trial tap-change operations to check the mechanical function of on-load tap-changer and motordrive unit. Proceed as follows: NOTICE Damage to the on-load tap-changer/de-energized tap-changer! Damage to the on-load tap-changer/de-energized tap-changer by actuating the on-load tap-changer/de-energized tap-changer without oil! Make sure that the selector/de-energized tap changer is fully immersed in transformer oil and that the oil compartment of the on-load tapchanger is completely filled with oil. The on-load tap-changer/de-energized tap-changer can be operated in the following temperature range: - when surrounded by transformer oil: 25 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC with synthetic esters in accordance with IEC 61099: 15 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC NOTICE! Undertake tap-change operation tests across entire range of settings. Make sure that in each operating position the tap position indicators of motor-drive unit and on-load tap-changer (inspection window in the on-load tap-changer head) read the same position. An incorrectly coupled motor-drive unit will damage the on-load tap-changer. 2. Check, in both end positions, the function of the electrical and mechanical end stop (see MR operating instructions for motor-drive unit). 196 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

197 6 Commissioning the on-load tap-changer at the transformer manufacturer's site 6.5 High-voltage tests on the transformer WARNING Danger of death or severe injury! Danger of death or severe injury from explosive gases under the on-load tap-changer head cover, in the pipework system, in the oil conservator, at the dehydrating breather opening, and from flying parts and hot oil splashing! Ensure that there are no naked flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none occur. Ensure that the oil compartment of the on-load tap-changer is completely filled with oil. Only use conductive and grounded hoses, pipes, and pump equipment that are approved for flammable liquids. Ensure that all protective devices for the on-load tap-changer are ready for use. Use suitable personal protective equipment/clothing. Keep away from the danger area during the transformer test. Observe applicable fire protection regulations. Make sure that only trained technicians perform work on the transformer. It is essential that you ensure only trained, instructed expert personnel who are familiar with and comply with the pertinent safety and technical regulations, who are aware of the potential risks, and who consistently use the occupational safety equipment provided to prevent injury and property damage are assigned to perform such a transformer test. Note the following points before undertaking high voltage tests on the transformer: Ensure that the ground connections on the motor-drive protective housing and protective housing fastening are free of paint. Only perform high voltage test if motor-drive unit door is closed. Disconnect external connections to electronic components in the motordrive unit to prevent damage from overvoltage. When connecting the motor-drive unit's supply voltage, only use the cable bushings in the protective housing base intended for lead insertion. Guide all ground connecting leads to one central connection point (establishment of suitable reference earth). Disconnect all electronic components before the high voltage test. Before a wiring dielectric test, remove all devices with a withstand voltage of < 1,000 V. Remove leads used for testing before the high voltage test as these function as antennas. Wherever possible, route the measurement and data leads separately from the energy cables. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 197

198 6 Commissioning the on-load tap-changer at the transformer manufacturer's site Contact the manufacturer if you have any questions about possible sources of danger. 198 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

199 7 Transporting transformer to the operating site 7 Transporting transformer to the operating site WARNING Danger of death or severe injury! Danger of death or severe injury from explosive gases under the on-load tap-changer head cover, in the pipework system, in the oil conservator or at the dehydrating breather opening! Ensure that there are no naked flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none occur. 7.1 Transport with removed drive If the drive must be removed in order to transport the transformer, proceed as follows: 1. Ensure that the drive and the on-load tap-changer are in the adjustment position. 2. Remove the drive. 3. Do not actuate the drive while the on-load tap-changer is uncoupled and do not turn the output shaft. 4. Do not actuate an on-load tap-changer which is uncoupled and do not turn its drive shaft. 5. Transport the drive to the installation site in the MR delivery packaging. 6. Fit drive [ 168] and drive shaft to transformer at the installation site. 7.2 Transport with oil fill and without oil conservator If the transformer is filled with oil but stored or transported without an oil conservator, a connecting lead for pressure compensation must be installed between the interior of the compartment and the transformer tank's oil chamber. To do so, proceed as follows: Establish the connecting lead on the on-load tap-changer head between connections E2 and Q or E2 and R. Figure 251: Connecting lead Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 199

200 7 Transporting transformer to the operating site In case of a short-term immobilization time of maximum 4 weeks without an oil conservator, dropping the oil level in the on-load tap-changer head by about 5 liters is also sufficient. 7.3 Transport without oil fill 1. NOTICE! Completely empty the oil compartment of the on-load tapchanger if the transformer is completely emptied of oil.if this is not done, the oil compartment may be damaged. 2. Preserve the interior of the oil compartment in the same way as the transformer (for example by filling with N2). For longer immobilization periods, you must connect and operate the motordrive unit heating. For downtimes prior to commissioning of more than 8 weeks and operation interruptions more than 2 weeks, you must connect and operate the heating to avoid condensation water in the interior of the protective housing Emptying oil compartment via pipe connection S WARNING Danger of explosion! Danger of death from explosive gases under the on-load tap-changer head cover! Ensure that there are no open flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none arise. De-energize all auxiliary circuits (for example tap-change supervisory device) before removing the on-load tap-changer head cover. Do not operate any electrical devices during the work (for example risk of sparks caused by impact wrench). Only use conductive and grounded hoses, pipes, and pump equipment that are approved for flammable liquids. 1. De-energize all auxiliary circuits (for example tap-change supervisory device). 2. With stop-cock (slide valve) between oil conservator and oil compartment open, open air-vent valve E1 on on-load tap-changer head. 3. Drain off the gas from under the on-load tap-changer cover. Ensure sufficient fresh air (for example in transformer cells and work tents). 4. Once the gas has been drained off and the oil is flowing out of the airvent valve, close this valve and close the stop-cock between the oil conservator and oil compartment. 5. Open air-vent valve again and drain off around 5 10 liters of oil via the pipe connection S until the area under the on-load tap-changer head cover is free of oil. 200 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

201 7 Transporting transformer to the operating site 6. Loosen 24 screws M10/wrench size 17 with locking elements on on-load tap-changer head cover. 7. Remove on-load tap-changer head cover. 8. Extract oil via pipe connection S. 9. Open stop-cock between oil conservator and oil compartment. ð The oil from the oil conservator flows into the oil compartment. 10. Extract oil via pipe connection S. 11. Place on-load tap-changer head cover on on-load tap-changer head. 12. Screw down on-load tap-changer head cover using 24 screws M10/ wrench size 17 and locking elements (tightening torque 34 Nm). Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 201

202 8 Commissioning the transformer at the operating site 8 Commissioning the transformer at the operating site WARNING Flying debris and spraying of hot oil resulting from on-load tapchanger overload! The on-load tap-changer can switch currents of up to 1.5 times the rated through current. Higher currents occur when activating transformers (inrush current impulse) or in the event of short-circuits, for example. Higher voltages may occur from transformer overexcitation following load shedding, for example. Danger of death or severe injury from flying debris and spraying of hot oil! Ensure that the on-load tap-changer is not overloaded. Prevent on-load tap-change operations if higher currents arise. Ensure that the rated step voltage is not exceeded. The rated step voltage may be briefly exceeded by up to 10 % as long as the rated through current is not exceeded. Ensure that the temperature limit values stated in the technical data are not exceeded. Before energizing the transformer, check that the motor-drive unit and protective relay are functioning correctly and fill the on-load tap-changer oil compartment with new mineral insulating oil. Proceed as follows: 8.1 Checking motor-drive unit Before commissioning the transformer, repeat the function tests on the motor-drive unit as described in MR operating instructions for motor-drive unit. WARNING NOTICE Danger of death or severe injury! Danger of death or severe injury due to incorrect operation! Under no circumstances is the transformer to be commissioned if the functions specified in the section "Tests on motor-drive unit" are not satisfied. Damage to the on-load tap-changer and motor-drive unit! Damage to on-load tap-changer and motor-drive unit due to condensate in protective housing of motor-drive unit! Always keep protective housing of the motor-drive unit tightly closed. In the event of downtimes prior to initial commissioning of more than 8 weeks or operation interruptions of more than 2 weeks, connect and operate the anti-condensation heater in the motor-drive unit. If this is not possible (e.g. during transportation), place a sufficient amount of dehydrating agent in the protective housing. 202 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

203 8 Commissioning the transformer at the operating site NOTICE Damage to the on-load tap-changer and motor-drive unit! Damage to on-load tap-changer and motor-drive unit due to incorrect use of position transmitter equipment! Only circuits stated in the chapter Technical data for position transmitter equipment may be connected to the position transmitter module connections. The switchover point of the position transmitter equipment in the motordrive unit is not the same as the switchover point of the diverter switch operation. This depends on the type of diverter switch. This fact should be noted when project planning the locking circuits between the motordrive unit and external equipment (e.g. transformer circuit breaker). For external monitoring, locking, and control purposes, it is not therefore the position transmitter equipment but the "Tap changer in operation" position transit contact shown in the connection diagram that should be used Checking protective relay Checking protective relay (RS 2001, 2001/V, 2001/H, 2001/E, 2001/5, 2001/R, 2003) ü Check that the protective relay is functioning correctly before commissioning the transformer: 1. Ground the transformer on the high-voltage and low-voltage sides. Ensure that the working ground connection on the transformer is not removed during testing. 2. Ensure that transformer remains de-energized during testing. 3. Deactivate the automatic fire extinguishing device. 4. Open terminal box of protective relay. 5. Press OFF test button. 6. Leave the transformer's danger zone. 7. Ensure that the transformer's circuit breaker cannot be closed. ð Passive protection test 8. Press IN SERVICE test button. 9. Leave the transformer's danger zone. 10. Close the transformer's circuit breaker with isolating switches open and the transformer grounded on all sides. 11. Press OFF test button. 12. Ensure that the transformer's circuit breaker is open. ð Active protection test. 13. Press IN SERVICE test button to reset the protective relay. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 203

204 8 Commissioning the transformer at the operating site Checking protective relay (RS 2004) ü Check that the protective relay is functioning correctly before commissioning the transformer: 1. Ensure that the flap valve is in the IN SERVICE position. 2. Leave the transformer's danger zone. 3. Close the transformer's circuit breaker with isolating switches open and the transformer grounded on all sides. 4. Press OFF test button. 5. Ensure that the transformer's circuit breaker is open. ð Active protection test Filling the oil compartment of the on-load tap-changer with oil WARNING NOTICE Danger of death or severe injury! Danger of death or severe injury from explosive gases under the on-load tap-changer head cover, in the pipework system, in the oil conservator or at the dehydrating breather opening! Ensure that there are no naked flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none occur. Damage to the on-load tap-changer/de-energized tap-changer! Damage to the on-load tap-changer/de-energized tap-changer by actuating the on-load tap-changer/de-energized tap-changer without oil! Make sure that the selector/de-energized tap changer is fully immersed in transformer oil and that the oil compartment of the on-load tapchanger is completely filled with oil. The on-load tap-changer/de-energized tap-changer can be operated in the following temperature range: - when surrounded by transformer oil: 25 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC with synthetic esters in accordance with IEC 61099: 15 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

205 8 Commissioning the transformer at the operating site 1. Establish a connecting lead between pipe connection E2 and one of the pipe connections R, S or Q to ensure equal pressure during evacuation in the oil compartment and transformer. Figure 252: Connecting lead between E2 and Q. 2. Fill on-load tap-changer with new mineral insulating oil for transformers in accordance with IEC using one of the two free pipe connections of the on-load tap-changer head. Figure 253: Pipe connection S and R 3. Take oil sample from oil compartment. 4. Record temperature of oil sample just after sample is taken. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 205

206 8 Commissioning the transformer at the operating site 5. Determine dielectric strength and water content at a diverter switch oil temperature of 20 C ± 5 C. The dielectric strength and water content must comply with the limit values specified in the technical data [ 214]. 8.4 Bleeding on-load tap-changer head and suction pipe Before first commissioning, the on-load tap-changer head and the suction pipe on pipe connection S must be bled Bleeding on-load tap-changer head 1. Open all forward and return valves in the pipe system. 2. Remove screw cap on air-vent valve E1 on the on-load tap-changer head cover. Figure 254: Screw cap 3. Use screwdriver to lift valve tappet on air-vent valve E1 and bleed onload tap-changer head. Figure 255: Valve tappet 4. Seal air-vent valve E1 with screw cap (tightening torque 10 Nm). 206 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

207 8 Commissioning the transformer at the operating site Bleeding suction pipe on pipe connection S 1. Remove screw cap from pipe connection S. Figure 256: Screw cap 2. NOTICE! Open vent screw and bleed suction pipe. Make sure the suction pipe is fully vented. The insulation capability of the on-load tapchanger to ground will otherwise be significantly impaired. 3. Close vent screw. 4. Seal vent screw with screw cap. 8.5 Performing trial tap-change operations Before you energize the transformer, you must carry out trial tap-change operations to check the mechanical function of on-load tap-changer and motordrive unit. Proceed as follows: NOTICE Damage to the on-load tap-changer/de-energized tap-changer! Damage to the on-load tap-changer/de-energized tap-changer by actuating the on-load tap-changer/de-energized tap-changer without oil! Make sure that the selector/de-energized tap changer is fully immersed in transformer oil and that the oil compartment of the on-load tapchanger is completely filled with oil. The on-load tap-changer/de-energized tap-changer can be operated in the following temperature range: - when surrounded by transformer oil: 25 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC with synthetic esters in accordance with IEC 61099: 15 C +105 C and up to +115 C as per IEC during emergency transformer operation in accordance with IEC Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 207

208 8 Commissioning the transformer at the operating site 1. NOTICE! Undertake tap-change operation tests across entire range of settings. Make sure that in each operating position the tap position indicators of motor-drive unit and on-load tap-changer (inspection window in the on-load tap-changer head) read the same position. An incorrectly coupled motor-drive unit will damage the on-load tap-changer. 2. Check, in both end positions, the function of the electrical and mechanical end stop (see MR operating instructions for motor-drive unit). 8.6 Commissioning the transformer 1. Loop the signaling contact for falling below the minimum oil level in the on-load tap-changer's oil conservator into the tripping circuit of the circuit breaker. 2. Loop protective relay and additional protective devices into circuit breaker's tripping circuit. 3. Ensure that all stop-cocks between on-load tap-changer and oil conservator of the on-load tap-changer are open. 4. NOTICE! Switch on transformer. Once the transformer has been switched on, ensure that the inrush current impulse has fully subsided before undertaking an on-load tap-change operation. The inrush current impulses are usually a multiple of the transformer rated current and can overload the on-load tap-changer during the diverter switch operation. ð After the transformer has been switched on and the inrush current impulse has subsided, on-load tap-changer tap-change operations can be performed both under no load and load conditions. During all function checks and tests when commissioning, in addition to the safety instructions in Chapter 2, also note the safety notice provided in the chapter Electrical high voltage tests on the transformer [ 197]. 208 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

209 9 Fault elimination 9 Fault elimination WARNING NOTICE Danger of explosion! Danger of death from explosive gases under the on-load tap-changer head cover! Ensure that there are no open flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none arise. De-energize all auxiliary circuits (for example tap-change supervisory device) before removing the on-load tap-changer head cover. Do not operate any electrical devices during the work (for example risk of sparks caused by impact wrench). Only use conductive and grounded hoses, pipes, and pump equipment that are approved for flammable liquids. Damage to the on-load tap-changer and transformer! Tripping of the protective relay or other protective devices can indicate damage on the on-load tap-changer and transformer! The transformer must not be energized without first undertaking checks! Check on-load tap-changer and transformer when protective relay or other protective devices have been tripped. Do not use the equipment again until you are sure there is no damage to the on-load tap-changer or transformer. Fault description The table below is intended to assist with detecting and, where possible, remedying faults. For more information, please consult the operating instructions for the RS-Ex protective relay or the relevant protective device. In the event of faults on the on-load tap-changer and motor-drive unit, which cannot be easily corrected on site, or if the RS-Ex protective relay or additional protective devices have been tripped, please inform your authorized MR representative, the transformer manufacturer or contact us directly at: Maschinenfabrik Reinhausen GmbH Technical Service Postfach Regensburg Germany Phone: Fax: service@reinhausen.com Internet: Action Tripping of protective relay (for example RS-Ex) See [ 211] Also contact MR. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 209

210 9 Fault elimination Fault description Activation of tap-change supervisory device Activation of rupture disk in on-load tap-changer head cover Tripping of motor protective switch in motor-drive unit Tripping of signaling contact that indicates that the oil has fallen below the minimum oil level in the onload tap-changer oil conservator On-load tap-changer not changing tap position (sluggishness, Raise keys/lower keys not working, no audible diverter switch action) No change in voltage on transformer despite change in position on motor-drive unit Tap position indicator on motor-drive unit and onload tap-changer different Noises on drive shaft or motor-drive unit when changing tap position Red message on monitoring unit Warning or tripping of Buchholz relay on transformer Deviation from desired value when measuring winding resistance of transformer Deviation from desired value during dissolved gas analysis (transformer oil) Deviation from desired value during transformer ratio test Action The motor-drive unit can no longer be electrically actuated once the tap-change supervisory device has been activated. Manual operation of the motordrive unit via the hand crank when the transformer is switched on is prohibited. On-load tap-changer and transformer must be checked. Depending on the cause of tripping, take measurements/carry out checks on the transformer. Contact MR to check the on-load tap-changer. On-load tap-changer and transformer must be checked. Depending on the cause of tripping, take measurements/carry out checks on the transformer. Contact MR to check the on-load tap-changer. See chapter "Fault elimination" in the operating instructions of the TAPMOTION ED-Ex motor-drive unit. Check pipework system (pipes etc.) and on-load tap-changer head for leaks. Check oil level and oil quality of diverter switch oil in accordance with operating instructions for on-load tap-changer. If the oil falls below the limit values, also contact MR. Contact MR. Contact MR. Contact MR. Ensure proper mounting of the drive shaft in accordance with its operating instructions. Check that hose clips and protective covers are seated correctly. Contact MR in the event of noise from the motor-drive unit. If possible read out database and send to MR along with error code. Notify manufacturer of transformer. Contact manufacturer of transformer and, if necessary, MR and provide measured values. Contact manufacturer of transformer and, if necessary, MR and provide measured values. Contact manufacturer of transformer and, if necessary, MR and provide measured values. 210 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

211 9 Fault elimination Fault description Deviation from limit value for diverter switch oil values Table 14: Fault elimination Action Carry out oil change, check oil conservator breather of on-load tap-changer. 9.1 Tripping of the protective relay and re-commissioning the transformer WARNING WARNING Danger of death or severe injury! Danger of death or severe injury from explosive gases in the protective relay, which accumulate during on-load tap-changer operation! Wait 15 minutes after switching off the transformer before you begin further work on the protective relay so that the gases have a chance to volatize. Ensure that there are no naked flames, hot surfaces or sparks (for example caused by static charging) in the immediate surroundings and that none occur. De-energize all auxiliary circuits before starting the work. Do not operate any electrical devices during the work (for example risk of sparks caused by impact wrench). Risk of severe injury or death! Risk of severe injury or death if on-load tap-changer and transformer are insufficiently tested! Be sure to contact Maschinenfabrik Reinhausen to check on-load tapchanger and transformer after the protective relay has been tripped. Only use the equipment again when you are sure there is no damage to the on-load tap-changer or transformer. When the circuit breakers have been tripped by the protective relay, proceed as follows: 1. Establish time of tripping. 2. Determine operating position of on-load tap-changer. 3. As a precaution, block the motor-drive unit by tripping the motor protective switch to prevent the on-load tap-changer from being actuated by remote control. 4. Check the on-load tap-changer head cover. If oil is leaking, shut the oil conservator stop valve immediately. 5. Check whether the flap valve of the protective relay is in the OFF or IN SERVICE position. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 211

212 9 Fault elimination Flap valve in IN SERVICE position If the flap valve is in the IN SERVICE position, there may be a fault in the tripping circuit. Check the tripping circuit in this case. If you are not able to clarify why the protective relay tripped, be sure to contact Maschinenfabrik Reinhausen to check the on-load tap-changer Flap valve in OFF position If the flap valve is in the OFF position, proceed as follows: 1. Ensure that the transformer is not started up under any circumstances. 2. Contact and inform Maschinenfabrik Reinhausen of the following: ð ð ð ð ð ð Serial number of protective relay and on-load tap-changer What was the load of the transformer at the instant of tripping? Was the on-load tap-changer moved immediately before or during tripping? Did any other protective devices of the transformer respond at the instant of tripping? Were switching operations in the network being carried out at the instant of tripping? Were overvoltages registered at the instant of tripping? 3. Take further action in agreement with Maschinenfabrik Reinhausen Re-commissioning the transformer Once the reason for the protective relay tripping has been established and remedied, you can re-commission the transformer: 1. Ensure that the flap valve is in the IN SERVICE position. 2. Commission the transformer. 212 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

213 10 Technical data 10 Technical data An overview of all key technical data for the on-load tap-changer and motordrive unit exists in the form of separate documents, which are available on request. Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 213

214 10.1 Limit values for dielectric strength and water content of on-load tap-changer oil 10.1 Limit values for dielectric strength and water content of onload tap-changer oil The following table provides the limit values for dielectric strength (measured in accordance with IEC 60156) and water content (measured in accordance with IEC 60814) of the on-load tap-changer oil for VACUTAP on-load tapchangers. The values have been established on the basis of IEC When commissioning the transformer for the first time U d H 2 O > 60 kv/2.5 mm < 12 ppm During operation > 30 kv/2.5 mm < 30 ppm After maintenance > 50 kv/2.5 mm < 15 ppm Table 15: Limit values for on-load tap-changer oil 214 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

215 10.2 Technical data for protective relay 10.2 Technical data for protective relay General technical data Housing Degree of protection IP 54 Relay actuation Vibration immunity Weight Oil flow speed of available types when tripping (oil temperature 20 C) Table 16: General technical data Tripping switch Outdoor model Flap valve with aperture up to max. 3 g approx. 3.5 kg 0.65 ± 0.15 m/s 1.20 ± 0.20 m/s 3.00 ± 0.40 m/s 4.80 ± 0.60 m/s The protective relay can be supplied with two independent dry-reed magnetic switches. These can be designed as normally open (NO) or normally closed (NC) contacts (see dimensional drawing supplied). Additional electrical data for the dry-reed magnetic switches Minimum admissible voltage Minimum switching capacity AC/DC Power frequency withstand voltage test (insulation against ground potential) 24 V 1.2 VA/1.2 W Between all voltage-carrying connections and the grounded parts: at least 2500 V, 50 Hz, test duration 1 minute Table 17: Additional electrical data for the dry-reed magnetic switches Electrical data for connecting to an inherently safe circuit Maximum input voltage U i 60 V Maximum input current I i 2 A Minimum switched current at 24 V 50 ma Maximum inner capacity C i negligible Maximum inner inductivity L i negligible Table 18: Connection to an inherently safe circuit Electrical data for connecting to a non-inherently safe circuit Rated voltage UC Rated current level Maximum AC switching capacity 250 V 2 A 200 VA Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 215

216 10.2 Technical data for protective relay Maximum DC switching capacity 130 W Minimum switched current at 24 V 50 ma Minimum switched current at 250 V 4.8 ma Table 19: Connection to a non-inherently safe circuit Thermal data Ambient temperature Ta Oil temperature Table 20: Thermal data -25 C +50 C < 130 C Protective relay with several dry-reed magnetic switches The protective relay can be supplied with several independent dry-reed magnetic switches. These can be designed as normally open (NO) or normally closed (NC) contacts and are electrically isolated (see dimensional drawing supplied). Electrical data for normally open (NO) and normally closed (NC) dry-reed magnetic switch 216 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

217 11 Drawings Drawings VACUTAP VRC/VRE-Ex, installation drawing (899992) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 217

218 11 Drawings 11.2 VACUTAP VRC/VRE-Ex, installation drawing (743600) 218 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

219 11 Drawings 11.3 VACUTAP VRD/VRF-Ex, installation drawing (899898) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 219

220 11 Drawings 11.4 VACUTAP VRD/VRF-Ex, installation drawing (743601) 220 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

221 11 Drawings 11.5 VACUTAP VRG-Ex, installation drawing (899945) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 221

222 11 Drawings 11.6 VACUTAP VRG-Ex, installation drawing (743602) 222 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

223 11 Drawings 11.7 VACUTAP VRC/VRE-Ex, installation position of tap selector connection contacts (727042) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 223

224 11 Drawings 11.8 VACUTAP VRC/VRE-Ex, installation position of tap selector connection contacts (743603) 224 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

225 11 Drawings 11.9 VACUTAP VRD/VRF/VRG-Ex, fine tap selector connection contact and change-over selector connection contact (899941) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 225

226 11 Drawings VACUTAP VR-Ex, special design for bell-type tank installation (720781) 226 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

227 11 Drawings VACUTAP VR-Ex, lifting device for bell-type tank installation (720845) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 227

228 11 Drawings VACUTAP VR-Ex, on-load tap-changer head (720847) 228 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

229 11 Drawings Pipe connection Q with tap-change supervisory control (766161) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 229

230 11 Drawings VACUTAP VR-Ex, adjustment positions (728557) 230 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

231 11 Drawings VACUTAP VRC/VRE-Ex, adjustment plan without changeover selector (719853) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 231

232 11 Drawings 232 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

233 11 Drawings VACUTAP VRC/VRE-Ex, adjustment plan without changeover selector (742422) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 233

234 11 Drawings 234 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

235 11 Drawings VACUTAP VRD/VRF-Ex, adjustment plan without changeover selector (721089) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 235

236 11 Drawings 236 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

237 11 Drawings VACUTAP VRD/VRF-Ex, adjustment plan without changeover selector (742423) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 237

238 11 Drawings 238 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

239 11 Drawings VACUTAP VRC III/VRC II/VRE III-Ex, adjustment plan with reversing change-over selector connection (719850) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 239

240 11 Drawings VACUTAP VRC I/VRE I-Ex, adjustment plan with reversing change-over selector connection (719851) 240 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

241 11 Drawings VACUTAP VRD/VRF-Ex, adjustment plan with reversing change-over selector connection (721092) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 241

242 11 Drawings VACUTAP VRD/VRF-Ex, adjustment plan with reversing change-over selector connection (745024) 242 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

243 11 Drawings VACUTAP VRG-Ex, adjustment plan with reversing change-over selector connection (727074) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 243

244 11 Drawings VACUTAP VRG-Ex, adjustment plan with reversing change-over selector connection (742424) 244 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

245 11 Drawings VACUTAP VRC/VRE-Ex, adjustment plan with coarse tap selector connection (719852) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 245

246 11 Drawings VACUTAP VRC/VRE-Ex, adjustment plan with coarse tap selector connection (742425) 246 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

247 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 10, 2-5 coarse tap connections (731412) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 247

248 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 10, 2-5 coarse tap connections (745032) 248 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

249 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 12, 2-5 coarse tap connections (731411) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 249

250 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 12, 2-5 coarse tap connections (745031) 250 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

251 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 14, 2-5 coarse tap connections (731410) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 251

252 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 14, 2-5 coarse tap connections (745030) 252 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

253 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 16, 2-5 coarse tap connections (731000) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 253

254 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 16, 2-5 coarse tap connections (745029) 254 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

255 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 18, 2-5 coarse tap connections (730977) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 255

256 11 Drawings Adjustment plan VACUTAP VRC-Ex with multiple coarse change-over selector for change-over selector division 18, 2-5 coarse tap connections (745028) 256 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

257 11 Drawings VACUTAP VRD/VRF-Ex, adjustment plan with coarse tap selector connection (721091) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 257

258 11 Drawings VACUTAP VRD/VRF-Ex, adjustment plan with coarse tap selector connection (742426) 258 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

259 11 Drawings VACUTAP VRG-Ex, adjustment plan with coarse tap selector connection (727075) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 259

260 11 Drawings VACUTAP VRG-Ex, adjustment plan with coarse tap selector connection (742427) 260 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

261 11 Drawings Tracing template for on-load tap-changer head (890183) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 261

262 11 Drawings Socket wrench for kerosene drain plug (723015) 262 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

263 11 Drawings Screw tools for installation and maintenance (723016) Maschinenfabrik Reinhausen GmbH /00 EN VACUTAP VR I HD-Ex 263

264 11 Drawings Bevel gear CD 6400, dimensional drawing (892916) 264 VACUTAP VR I HD-Ex /00 EN Maschinenfabrik Reinhausen GmbH 2017

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266 MR worldwide Australia Reinhausen Australia Pty. Ltd. 17/20-22 St Albans Road Kingsgrove NSW 2208 Phone: Fax: sales@au.reinhausen.com Brazil MR do Brasil Indústria Mecánica Ltda. Av. Elias Yazbek, 465 CEP: Embu - São Paulo Phone: Fax: vendas@reinhausen.com.br Canada Reinhausen Canada Inc. 3755, rue Java, Suite 180 Brossard, Québec J4Y 0E4 Phone: Fax: m.foata@ca.reinhausen.com India Easun-MR Tap Changers Ltd. (Joint Venture) 612, CTH Road Tiruninravur, Chennai Phone: Fax: service@easunmr.com Indonesia Pt. Reinhausen Indonesia German Center, Suite 6310, Jl. Kapt. Subijanto Dj. BSD City, Tangerang Phone: Fax: c.haering@id.reinhausen.com Iran Iran Transfo After Sales Services Co. (Joint Venture) Zanjan, Industrial Township No. 1 (Aliabad) Corner of Morad Str. Postal Code itass@iran-transfo.com Italy Reinhausen Italia S.r.l. Via Alserio, Milano Phone: Fax: sales@it.reinhausen.com Japan MR Japan Corporation German Industry Park Hakusan, Midori-ku Yokohama Phone: Fax: Malaysia Reinhausen Asia-Pacific Sdn. Bhd Level 11 Chulan Tower No. 3 Jalan Conlay Kuala Lumpur Phone: Fax: mr_rap@my.reinhausen.com P.R.C. (China) MR China Ltd. (MRT) 开德贸易 ( 上海 ) 有限公司中国上海浦东新区浦东南路 360 号新上海国际大厦 4 楼 E 座邮编 : 电话 : 传真 : 邮箱 :mr-sales@cn.reinhausen.com mr-service@cn.reinhausen.com Russian Federation OOO MR Naberezhnaya Akademika Tupoleva 15, Bld. 2 ("Tupolev Plaza") Moscow Phone: Fax: mrr@reinhausen.ru South Africa Reinhausen South Africa (Pty) Ltd. No. 15, Third Street, Booysens Reserve Johannesburg Phone: Fax: support@za.reinhausen.com South Korea Reinhausen Korea Ltd. 21st floor, Standard Chartered Bank Bldg., 47, Chongro, Chongro-gu, Seoul Phone: Fax: you-mi.jang@kr.reinhausen.com U.S.A. Reinhausen Manufacturing Inc North 9th Avenue Humboldt, TN Phone: Fax: sales@reinhausen.com United Arab Emirates Reinhausen Middle East FZE Dubai Airport Freezone, Building Phase 6 3rd floor, Office No. 6EB, 341 Dubai Phone: Fax: service@ae.reinhausen.com Luxembourg Reinhausen Luxembourg S.A. 72, Rue de Prés L-7333 Steinsel Phone: Fax: sales@lu.reinhausen.com Maschinenfabrik Reinhausen GmbH Falkensteinstrasse Regensburg /00 EN 02/ (0) (0) sales@reinhausen.com