CGM.3 System. Medium Voltage SF 6 gas-insulated cubicles up to 38 kv according to IEEE and CSA standards

Transcription

1 CGM.3 System Medium Voltage SF 6 gas-insulated cubicles up to 38 kv according to IEEE and CSA standards General Instructions IG-183-EN, version 03; 06/03/2013

2 Legal Deposit: BI-0272/2013 CAUTION! When medium-voltage equipment is operating, certain components are live, other parts may be in movement, and some may reach high temperatures. Therefore, the use of this equipment poses electrical, mechanical and thermal risks. In order to ensure an acceptable level of protection for people and property, and in compliance with applicable environmental recommendations, Ormazabal designs and manufactures its products according to the principle of integrated safety, based on the following criteria: Elimination of hazards wherever possible. Where elimination of hazards is neither technically nor economically feasible, appropriate protection functions are incorporated in the equipment. Communication about remaining risks to facilitate the design of operating procedures which prevent such risks, training for the personnel in charge of the equipment, and the use of suitable personal protection equipment. Use of recyclable materials and establishment of procedures for the disposal of equipment and components so that once the end of their service lives is reached, they are duly processed in accordance, as far as possible, with the environmental restrictions established by the competent authorities. Consequently, the equipment to which the present manual refers complies with the requirements of section 11.2 of the forthcoming IEC standard It must therefore only be operated by appropriately qualified and supervised personnel, in accordance with the requirements of standard EN on the safety of electrical installations and standard EN on activities in or near electrical installations. Personnel must be fully familiar with the instructions and warnings contained in this manual and in other recommendations of a more general nature which are applicable to the situation according to current legislation. The above must be carefully observed, as the correct and safe operation of this equipment depends not only on its design but also on general circumstances which are in general beyond the control and responsibility of the manufacturer. More specifically: The equipment must be handled and transported appropriately from the factory to the place of installation. All intermediate storage should occur in conditions which do not alter or damage the characteristics of the equipment or its essential components. Service conditions must be compatible with the equipment rating. The equipment must be operated strictly in accordance with the instructions given in the manual, and the applicable operating and safety principles must be clearly understood. Maintenance should be performed properly, taking into account the actual service and environmental conditions in the place of installation. The manufacturer declines all liability for any significant indirect damages resulting from violation of the guarantee, under any jurisdiction, including loss of income, stoppages and costs resulting from repair or replacement of parts. Guarantee The manufacturer guarantees this product against any defect in materials and operation during the contractual period. In the event that defects are detected, the manufacturer may opt either to repair or replace the equipment. Improper handling of this equipment and its repair by the user shall constitute a violation of the guarantee. Registered Trademarks and Copyrights All registered trademarks cited in this document are the property of their respective owners. The intellectual property of this manual belongs to the manufacturer. In view of the constant evolution in standards and design, the characteristics of the elements contained in this manual are subject to change without prior notification. These characteristics, as well as the availability of components, are subject to confirmation by Ormazabal.

3 General Instructions Index 3 INDEX 1 Description and main characteristics Cubicle elements ekorvpis voltage presence indication unit ekorsas - acoustic grounding prevention alarm unit Nameplate Mechanical characteristics Transport Lifting methods Location of documentation and accessories during transport P Modules L and V Modules Storage 15 4 Installation Unpacking the equipment Civil engineering works Fastening to the floor Floor fastening on a profile Fastening to the floor by anchoring Connecting the cubicles Grounding the equipment Cable connection Recommended sequence of operations Checking voltage presence and phase balance Operating levers Lever for B, BR-A, AV and RAV Driving Mechanisms Spring charging lever for CGM.3-V CGM.3-L cubicle Opening operation from the grounded position Switch closing operation from the open position Opening operation from the switch-disconnector closed position Grounding operation from the open position Cable test CGM.3-S cubicle Switch-disconnector closing operation Switch-disconnector opening operation CGM.3-S-Ptd cubicle Opening operation from the grounded position Closing operation from the open position Opening operation from the switch-disconnector closed position Grounding operation from the open position CGM.3-S-Pti cubicle Opening operation from the grounded position Closing operation from the open position Opening operation from the switch-disconnector closed position Grounding operation from the open position CGM.3-P cubicle Opening operation from the grounded position Switch-disconnector closing operation from the open position (using the BR-A driving mechanism) Opening operation from the switch-disconnector closed position Grounding operation from the open position Selection of Recommended Fuses Fuse replacement sequence CGM.3-RB with grounding Opening operation from the grounded position Grounding operation from the open position CGM.3-V cubicle with driving mechanism A(M)V Opening operation from the grounded position Closing operation from the open position Opening operation from the closed position Grounding operation from the open position CGM.3-V cubicle with driving mechanism A(M)V (3G) or RA(M)V (3G) Opening operation from the grounding position Closing operation from the open position Opening operation from the closed position Grounding operation from the open position Interlocks Locking with a Padlock Locking with a Key Lock (optional) Maintenance Voltage presence indicator test Acoustic grounding prevention alarm test Connecting the ekorsas unit Specific maintenance for the CGM.3-V cubicle Additional information Spares and accessories Environmental information Electrical characteristics of the driving mechanisms Coils and Indicating Contacts Motorized units

4 4 Description and main characteristics General Instructions 1 Description and main characteristics The CGM.3 system is made up of a range of fully insulated modular SF 6 cubicles, which allow the configuration of different medium voltage secondary electrical distribution diagrams up to 38 kv. 1.1 Cubicle elements Each cubicle is made up of a series of independent compartments: CGM.3 system cubicles comply, as applicable, with the following standards: Standard CAN CSA C22.2 No IEEE C37.74 IEEE C IEEE 1247 IEEE C IEEE C IEEE C37.04 IEEE C37.06 IEEE C37.09 IEEE C IEC IEC Switchgear assemblies Description IEEE Standard Requirements for Subsurface, Vault, and Pad-Mounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems Up to 38 kv IEEE Standard for Metal-Enclosed Interrupter Switchgear IEEE Standard for Interrupter Switches for Alternating Current, Rated Above 1000 Volts IEEE Guide to Specifications for Gas-Insulated, Electric Power Substation Equipment IEEE Standard for Indoor AC Switches (1 kv - 38 kv) for Use in Metal-Enclosed Switchgear IEEE Standard Rating Structure for AC High- Voltage Circuit Breakers AC high-voltage circuit breakers rated on a symmetrical current basis: preferential ratings and related capacities required IEEE Standard Test Procedure for AC High- Voltage Circuit Breakers Rated on a Symmetrical Current Basis IEEE Guide for Testing Medium Voltage Metal- Enclosed Switchgear for Internal Arcing Faults Degrees of protection provided by enclosures (IP Code) Voltage presence indicating systems The CGM.3 system comprises the following functional units: Modular Units 1 Gas tank 2 Driving mechanism compartment 3 Base 3a Cable compartment 3b Gas relief compartment Fig. 1.1: Main components of CGM.3 modular cubicles 1) Gas tank: Sealed compartment which houses the busbar and the switching and breaking elements, where the insulating medium is SF 6. The tank has a membrane to allow gases to escape in the event of an internal arc. CAUTION Do not refill the switchgear. CGM.3-L CGM.3-S CGM.3-S-Pt CGM.3-P CGM.3-V CGM.3-RB CGM.3-RC Feeder cubicle Busbar switch cubicle Busbar switch cubicle with ground connection on the right (Ptd) or on the left (Pti) Fuse protection cubicle Circuit-breaker cubicle Busbar rise cubicle Cable rise cubicle

5 General Instructions Description and main characteristics 5 Fig. 1.2: Gas tank Each tank has a manometer for checking the gas pressure, which can easily be seen from outside the cubicle. The manometer scale is divided into different colors: red, grey and green. For safe operation, the needle must be in the green zone of the corresponding temperature band. Fig. 1.3: Manometer CAUTION Pressure gauge is not intended to be used for telemetry purposes. Includes a padlockable coupling device which allows the driving mechanism to be replaced regardless of the position of the switch-disconnector: closed, open or grounded. Fig. 1.4: Device for coupling the switch Switch-Disconnector and Grounding Switch: This has three positions: closed, open or grounded. This switch is operated using driving mechanisms with two different shafts: one for the switch (switching between the Closed and Open positions); and the other for the grounding switch (which switches between the Open and Grounded positions) on the feeder cables, and in the case of fused protection cubicles, on the six fuse holder clamps. These elements are operated independently so that their actuation speed does not depend on the speed of the manual operation. Vacuum Circuit-Breaker: The CGM.3-V cubicle's circuitbreaker uses vacuum switching technology. The circuit-breaker is actuated by means of the pushbutton on the front of the cubicle. For manual operation, springs must be charged with the corresponding lever. To ensure that the isolating distance is adequate, the CGM.3-V cubicle's circuit-breaker comes standard with a switch-disconnector and a grounding switch. This element is operated using a specific lever, depending on the type of driving mechanism model. The CGM.3-V circuit-breaker cubicles can be equipped with an electromechanical safety device called an undervoltage coil. Its function is to ensure that the cubicle switch opens in the event of an unexpected drop of more than 30% in the auxiliary voltage.

6 6 Description and main characteristics General Instructions CGM.3-S 2) Driving Mechanism Compartment: this is the compartment in which the switch-disconnector or the circuit-breaker is actuated, depending on the type of cubicle. The mimic diagram for the main medium voltage circuit is displayed on the cover of this compartment. The mimic diagram includes all the position indicators for the actuators. Elements in the driving mechanism area of modular cubicles: CGM.3-L CAUTION When the CGM.3-V circuit-breaker cubicles have an undervoltage coil, a possible lack of auxiliary voltage in the coil could cause the cubicle to block if it is in grounding For these occasions, the undervoltage coil has a manual blocking mechanism that retains the trip rod while the manual mechanism remains actuated and the coil has no voltage. For more information on how to carry out the manual blocking of the undervoltage coil or how to act in the event of an accidental blocking of the cubicle, see the corresponding spares and accessories instructions document. b c d Fig. 1.6: Switch-disconnector actuation zone (B and BM driving mechanisms) Status Indicators GREEN open RED closed Actuation shaft access handle CGM.3-S-Ptd Mimic diagram of CGM.3-S cubicle a b c d e Fig. 1.5: Grounding switch actuation zone Switch-disconnector actuation zone (B and BM driving mechanisms) Status Indicators GREEN open RED closed Actuation shaft access handle ekorvpis voltage presence indicator Mimic diagram of CGM.3-L cubicle a b c d e Fig. 1.7: Grounding switch actuation zone Switch-disconnector actuation zone (B and BM driving mechanisms) Status Indicators GREEN open RED closed Actuation shaft access handle ekorvpis voltage presence indicator Mimic diagram of CGM.3-S-Ptd cubicle

7 General Instructions Description and main characteristics 7 CGM.3-S-Pti CGM.3-V a b c d e Grounding switch actuation zone Switch-disconnector actuation zone (B and BM driving mechanisms) Status Indicators GREEN open RED closed Actuation shaft access handle ekorvpis voltage presence indicator Fig. 1.8: Mimic diagram of CGM.3-S-Pti cubicle CGM.3-P a b c d f g h n Fig. 1.9: Grounding switch actuation zone Spring charging and simultaneous switch actuation zone (BR-A driving mechanisms) Status Indicators GREEN open RED closed Actuation shaft access handle ekorvpis voltage presence indicator Switch opening button (BR-A driving mechanism) Fuse status indicator Spring status indicator Mimic diagram of CGM.3-P cubicle a b c d f h i j k l m n Grounding switch actuation zone Spring charging and simultaneous switch actuation zone (B driving mechanisms) Status Indicators GREEN open RED closed Actuation shaft access handle ekorvpis voltage presence indicator ekorrpg protection unit Operation counter Spring charging shaft Circuit-breaker opening Circuit-breaker closing Circuit-breaker position indicator Spring status indicator Fig. 1.10: Mimic diagram of CGM.3-V (A(M)V) and CGM.3-V (3G) cubicles

8 8 Description and main characteristics General Instructions CGM.3-RB with grounding CGM.3-RC a c d f Grounding switch actuation zone Status Indicators GREEN open RED closed Actuation shaft access handle ekorvpis voltage presence indicator Fig. 1.11: Mimic diagram of CGM.3-RB with grounding CGM.3-RB without grounding Fig. 1.13: Mimic diagram of CGM.3-RC cubicle 3) Base: made up of the cable compartment (3a) and the gas relief compartment (3b), see Figures 1.1 and 1.2. The first is located in the lower front part of the cubicle and has a cover interlocked with the unit's ground connection, which allows front access to the medium voltage cables. The gas relief compartment is located in the lower rear section of the cubicle. In the event of an internal arc, the gases produced are deflected downwards and to the rear, and in no way affecting any persons, cables, or the rest of the installation switchgear. For cubicles with 1 s internal arc, the gases are diverted to the trench. a c d f Grounding switch actuation zone Status Indicators GREEN open RED closed Actuation shaft access handle ekorvpis voltage presence indicator Fig. 1.12: Mimic diagram of CGM.3-RB without grounding Fig. 1.14: Cable compartment

9 General Instructions Description and main characteristics ekorvpis voltage presence indication unit The ekorvpis unit displays three signals, which correspond to each of the phases. The presence of voltage is indicated in each phase by means of flashing indicators. The ekorvpis unit indicates the presence of voltage in the operating range specified in the IEC standard. ekorvpis displays the following indications: ekorsas - acoustic grounding prevention alarm unit The ekorsas grounding prevention alarm is an acoustic indicator which works in association with the grounding shaft handle and the ekorvpis voltage presence indicator. Both operate within the same range. The alarm is activated when there is voltage in the cubicle's medium voltage feeder and the lever is inserted in the grounding switch shaft. A sound then warns the operator that if he performs the operation, a short-circuit in the network might occur. This unit is standard on CGM.3 system feeder functional units and supplied to order in the rest of the functional units. 1 The numbering corresponds to the order of the phases, from left to right, seen from the front of the cubicle. Each phase has a test point for checking the phase balance between cubicles. 2 Display each of the indicator phases 3 Voltage presence indicator A flashing light indicates the presence of voltage in that phase. 4 Ground test point This is only used for comparing the phases. Fig. 1.15: ekorvpis Voltage Presence Indication Unit The test points for the ground and the three phases make it easier to check the phase balance between cubicles. Any universal comparator which complies with specifications of standard IEC can be used for this purpose. If the indicators do not light up, use other means to check that there is no voltage. Fig. 1.16: Location of ekorsas unit

10 10 Description and main characteristics General Instructions Nameplate Every cubicle has a name plate indicating some of the following values: 1.2 Mechanical characteristics The dimensions and weights of the CGM.3 cubicle system are represented in the following table. Fig. 1.17: Nameplate Nameplate General instr. Manual of General Instructions (IG) corresponding to the system No. Cubicle serial number (*) Identifier Cubicle model Type Type of circuit-breaker (if applicable) U r Equipment rated voltage (kv) BIL (U p ) Lightning impulse withstand voltage (kv) U d Power frequency withstand voltage (kv) f r Equipment rated frequency (Hz) I r / I load Equipment rated continuous current and load switching current (A) I cc Equipment rated cable-charging switching current (A) I ut Equipment rated unloaded transformer switching current (A) (if applicable) Number of mechanical operations (switch: 1000 or M1 or M operations; circuit-breaker 2000 or operations) I k / I p Short-time withstand current/ Short-time withstand peak value - Fault making current (ka) t k Short-time withstand current time (s) P re / P me Rated filling pressure for insulation / Rated filling pressure for operation (kpa) Minimum functional pressure for insulation / P me / P mm Minimum functional pressure for operation (kpa) U a Rated auxiliary voltage (V) SF 6 Weight of insulating fluid (g) Weight Total weight of cubicle (kg) Date Month and year of manufacture T c Thermal class (ºC) DC Percentage of Direct Current component in circuitbreaker cubicle Int.time Rated interrupting time in circuit-breaker cubicle Duty Cycle I sc Address Rated operating duty cycle in circuit-breaker cubicle Rated short-circuit switching current in circuitbreaker cubicle Factory address (*) In the event of a problem or non-conformity, note down this number and send it to Ormazabal. Fig. 1.18: CGM.3 dimensions

11 General Instructions Description and main characteristics 11 L S S-Pt P V RC left RC right RB RB with grounding Module Width (a) (inches) [mm] Depth (f) (inches) [mm] Height (h) (inches) [mm] Bushings Height (g) (inches) [mm] Weight (pounds) [kg] Internal arc up to 20 ka s (313) [142] Internal arc [2] up to 20 ka [3] - 1 s (16) [418] (33 [1] ) [850 [1] ] (69) [1745] (41) [1042] (357) Internal arc [2] up to 25 ka - 1 s [162] Internal arc up to (298) 20 ka s (16) (33) (69) [135] - Internal arc [2] up to [418] [850] [1745] (315) 20 ka [3] - 1 s [143] Internal arc up to (386) 20 ka s (24) (33) (69) [175] - Internal arc [2] up to [600] [850] [1745] (408) 20 ka [3] - 1 s [185] Internal arc up to (485) 20 ka s [220] Internal arc [2] up to (19) (40) (69) (21) 20 ka [3] - 1 s [480] [1010] [1745] [525] (507) Internal arc [2] up to [230] 25 ka - 1 s Internal arc up to 20 ka s (551) [250] Internal arc [2] up to 20 ka [3] - 1 s (24) [600] [4] (33) [850] (69) [1745] (27) [695] (562) Internal arc [2] up to 25 ka - 1 s [255] No internal arc (93) [42] Internal arc up to (14) (33) (69) - 20 ka [3] - 1 s [367] [831] [1745] (133) Internal arc up to [60] 25 ka - 1 s Internal arc up to (304) 20 ka s [138] Internal arc [2] up to (16) (33) (69) (41) 20 ka [3] - 1 s [418] [850] [1745] [1042] (348) Internal arc [2] up to [158] 25 ka - 1 s [1] Cubicle with double cable: 37 inches (930 mm). [2] The IAC category means that all the medium voltage cubicle compartments are protected against internal arcs. [3] Tests conducted with a current of 21 ka. [4] As an option, there is also available a 23 inches (595 mm) wide model of the CGM.3-V cubicle. Contact Ormazabal.

12 12 Transport General Instructions 2 Transport 2.1 Lifting methods The cubicles must always be kept upright, directly on the ground or on a pallet depending on the type of handling involved. To handle CGM.3 assemblies with up to 4 functional units, one of the following methods should be used: 1) Using a forklift truck or hand-operated pallet truck. Fig. 2.2: Lifting a CGM.3 modular cubicle with slings 3) if it is not possible to use the aforementioned methods, rollers may be used underneath the cubicles. Another option is to slide the cubicles over rods (these same rods can be used to get over the trench). 4) To handle 5 functional unit CGM.3 assemblies use lifting systems (slings, lifting beam, etc,...) with a pull angle greater than 65º and less than 115º in order to prevent possible damage to the cubicles during hoisting. Fig. 2.1: Lifting a CGM.3 modular cubicle using a fork-lift truck Position the rear of the cubicle facing the driver, to avoid damaging the front. 2) Raising it using slings fixed to the lifting supports on the sides of the top of the cubicle. The angle of pull should be as vertical as possible (with an angle of more than 60º from the horizontal). Fig. 2.3: Lifting a CGM.3 assembly with 5 functional units

13 General Instructions Transport P Modules Fig. 2.4: Lifting a CGM.3 assembly with a forklift truck CAUTION The use of lifting beams is required for cubicle assemblies with control boxes As the sole exception, slings may be used if the cubicles of the assembly have identical height control boxes installed. Fig. 2.5: Location of documentation and accessories L and V Modules 2.2 Location of documentation and accessories during transport During transport, the cubicle must be perfectly seated and fixed so that it cannot move about and possibly damage the equipment. The corresponding documentation (General Instructions, electrical diagrams, etc.) is supplied with the cubicles, as well as a set of accessories located at the rear of the cubicles, as indicated in the figures below: The cubicle models with internal arc for 1 s have the accessories box located on the roof of the tank. Fig. 2.6: Location of documentation and accessories

14 14 Transport General Instructions Depending on the medium voltage cubicle model, the accessory box contains some of the following items: Ormazabal's IG-183 General Instructions Document Actuating lever Spring charging lever Cubicle connecting kit: ORMALINK Springs Syntheso grease Grounding bar End plug kit: Cubicle end assembly Nylon thread Plastic plugs Side cover

15 General Instructions Storage 15 3 Storage If they need to be stored, Ormazabal's Medium Voltage cubicles must be placed on dry ground or, if necessary, on top of damp-proof insulating material, and always in its original packaging. After prolonged storage, clean all the insulating parts carefully before commissioning the equipment. The enclosure should be cleaned with a clean dry lint-free cloth. Available in - 40 ºF (- 40 ºC) indoor class cubicles The recommended conditions of storage are as follows: Maximum height above sea level 6500 feet (2000 m). Do not store in harsh environments. The equipment must be adjusted to the existing atmospheric pressure. Otherwise, the manometer needle may indicate an incorrect value (red scale) even if the equipment internal pressure is correct.

16 16 Installation General Instructions 4 Installation 4.1 Unpacking the equipment CGM.3 system cubicles come wrapped in protective plastic. On receiving the equipment, check that the goods supplied correspond to the order and associated documentation. The procedure for unpacking the equipment is as follows: 1) Using a blade, cutter or similar tool, cut the cellophane the cubicle is wrapped in It is advisable to cut the cellophane at the rear of the cubicle or at the corner to avoid scratching the surface. 2) Remove the cellophane. 3) Detach the white polystyrene corner pieces. 4) Unscrew the fixings between the base and the pallet. 5) Remove the pallet, handling the cubicle as indicated in section ) Unpack the documentation and accessories box located at the bottom rear section or on the roof of the cubicle, depending on the cubicle model. 7) Remove the self-adhesive protective plastic from the cable compartment cover. 8) Dispose of any waste in an environmentally-friendly manner. It is advisable to make a visual inspection of the equipment to check whether it has suffered any damage in transit. If so, contact Ormazabal immediately. CAUTION The self-adhesive plastic must be removed from the cable compartment cover so that the equipment enclosure s ground connection may have the proper electrical continuity. 4.2 Civil engineering works The minimum distances to the walls and roof, and from the trench for the medium voltage cables are as follows: Fig. 4.1: Minimum installation distances Minimum Distances (Inches) [mm] Side wall (a) (4) [100] Ceiling (b) (24) [600] Front clearance (c) (20) (500) Function Rear wall (d) CGM.3-L/S (4) [100] / (6) [160] ( * ) CGM.3-P 0 CGM.3-V (4) [100] / (6) [160] ( * ) CGM.3-RC/RB (4) [100] / (6) [160] ( * ) ( * ) Diagrams combined with P modules. These measurements have been obtained in accordance with the internal arc tests, which have been carried out in a compartment 90 inches [2300 mm] high, for gas-insulated modules, according to Annex A of Standard IEC for Class IAC, AFL similar to IEEE C for Class 1D-SR or 1D-SL.

17 General Instructions Installation 17 The space required to extend the assembly with an additional cubicle is 10 inches (250 mm) plus the width of the new cubicle. In the event of doubt, ask Ormazabal. 4.3 Fastening to the floor Before assembling the cubicles, the floor must be carefully leveled to prevent any deformation which may make it difficult to connect the cubicles to one another. The cubicles can be fastened to the floor with or without a profile Fastening to the floor by anchoring If the floor of the Transformer Substation is even enough, it is advisable to install the medium voltage cubicle assembly directly anchored to the floor. The sequence for anchoring the cubicles to the floor is as follows: 1) Operate the cubicle's switch to the grounding See section 5 Recommended sequence of operations of this General Instructions document. By default, the cubicles are supplied with the switch in grounding 2) Remove the cable compartment cover, using the central handle on the cover to pull it up and forward as indicated in the figure. a b c M10 x 25 screw 65 x 65 x 4 profile Anchoring support Fig. 4.2: Fastening cubicles on profile Floor fastening on a profile If the floor of the Transformer Substation is not sufficiently uniform, it is advisable to install the medium voltage cubicle assembly on an auxiliary profile, to make it easier to connect them. This profile, which can be supplied to order, must be anchored to the floor using expansion screws.

18 18 Installation General Instructions Module L S S-Pt P V RB a b c d e (2) [50] (2) [50] (2) [50] (2) [50] (2) [50] (2) [50] (14) [368] (14) [368] (22) [550] (17) [430] (22) [550] (14) [368] Anchoring Dimensions (inches) [mm] (10) [245] (2) [60] - - (13) [325] - - (10) [245] - - Internal arc up to 20 ka s (21) [540] (21) [540] (21) [540] (21) [540] (21) [540] (21) [540] f Internal arc up to 20 ka - 1 s (28) [710] (28) [710] (28) [710] (28) [710] (28) [710] (28) [710] Internal arc up to 25 ka - 1 s (28) [710] (28) [710] (28) [710] (28) [710] (28) [710] (28) [710] g Fig. 4.3: Removing the cable compartment cover 3) Anchor the first medium voltage cubicle to the floor of the installation, using screws at the points prepared in its base. This will prevent vibrations or movements due to short-circuits, possible flooding of the Transformer Substation, etc. Bear the following dimensions and figures in mind. RB with grounding RC (2) [50] (2) [50] (14) [368] (12) [317] (10) [245] - - (21) [540] * * No internal arc (21) [540] (28) [710] (28) [710] (28) [710] (28) [710] - RC left (8) [209] RC right (6) [158] Fig. 4.4: Anchoring points in CGM.3 cubicles Fig. 4.5: Anchoring points in cubicles CGM.3 -L, -S, -S-Pt, -P,-V, -RB, -RB with grounding

19 General Instructions Installation Connecting the cubicles The joining of cubicles must be carried out as indicated in Ormazabal's Spares and Accessories document RA-163, which is supplied with the materials kit used for connecting cubicles. Fig. 4.6: Anchoring points in cubicles CGM.3 -L, -S, -S-Pt, -P, -V, -RB, -RB with grounding & double cable 4.5 Grounding the equipment For connecting the general grounding collector, follow the procedures listed below: 1) Screw the ground connection bar between each 2 Medium Voltage cubicles, at their back side, using 2 M8 x 20 hexagonal screws. Apply a tightening torque of 15 Nm. Tools: in (13 mm) spanner. Torque wrench with in (13 mm) adapter. Fig. 4.7: Anchoring points in CGM.3-RC cubicles Once properly leveled, the final installation of the medium voltage cubicle assembly only requires electrical and mechanical coupling between the different cubicles, and then anchoring to the floor, which must be carried out as indicated above. Fig. 4.8: Grounding the equipment 2) Connect the end grounding bar, marked with the symbol, to the Transformer Substation's general ground connection. CAUTION Grounding the equipment is an essential condition for safety.

20 20 Installation General Instructions 4.6 Cable connection The medium voltage incoming and outgoing feeders are linked to the transformer or other cubicles via cables. These cables and the corresponding bushings on the CGM.3 system cubicles can be connected with simple (plug-in) or reinforced (screw-in) connecting points, either IEC type or IEEE-386 compliant. The cable compartment contains the connecting cable bushings for the incoming and outgoing lines, as well as for the outputs to the transformer. The size of the cable compartment allows the use of both insulated and partially insulated terminals. It is advisable to use fully insulated connectors for voltages of 36 kv, according to HD 629. CAUTION Never touch live connectors, not even screened connectors. Screening does not constitute a protection against direct contact. When the equipment is in service and a reserve cubicle is left with voltage in the upper busbar and without the cables in the lower bushings, insulating plugs must be placed in the bushings or close the grounding switch and lock that position with a padlock.

21 General Instructions Recommended sequence of operations 21 5 Recommended sequence of operations DANGER Before carrying out any operation when voltage is present, check the SF 6 gas pressure, using the manometer. Do not operate if SF 6 pressure is low. For safety reasons, maintenance operations performed directly on the driving mechanism must be performed WITHOUT any actuating lever inserted. CAUTION Do not refill the switchgear. 5.1 Checking voltage presence and phase balance Any universal comparator which complies with specifications of standard IEC can be used for checking that the medium voltage cables are correctly connected to the transformer substations feeder cubicles. On demand, Ormazabal can supply the ekorspc phase comparator unit. Firstly, connect the red cables of the ekorspc unit to the corresponding phase test points on the ekorvpis units, and the black cable to the ground test point. This operation must be repeated for all the phases L1, L2 and L3. 1 Comparison of balanced phases There is NO indication on the comparator. 2 Comparison of unbalanced phases YES, there is indication on the comparator. Fig. 5.1: Connecting the ekorspc unit See section ekorvpis - Voltage Presence Indicator Unit of this General Instructions document.

22 22 Recommended sequence of operations General Instructions 5.2 Operating levers CAUTION For safety reasons, maintenance operations performed directly on the driving mechanism must be performed WITHOUT any actuating lever inserted. The CGM.3 system cubicles are operated with 3 different types of lever, depending on the type of driving mechanism used Lever for B, BR-A, AV and RAV Driving Mechanisms This is an anti-reflex lever for performing closing (I) and opening (O) operations in the switch/disconnector respectively, without exceeding the medium voltage cubicle's maneuvering limits. 1 CGM.3-V A(M)V Fig. 5.2: Driving mechanism lever This type of lever prevents the opposite operation being carried out immediately after opening or closing the switch Spring charging lever for CGM.3-V The spring charging lever is used to manually charge the springs in the circuit breaker driving mechanism. 2 CGM.3-V (3G) Fig. 5.3: Spring charged lever types for CGM.3-V cubicle

23 General Instructions Recommended sequence of operations CGM.3-L cubicle Opening operation from the grounded position 1) Move the actuation shaft access handle in the yellow zone to its lower 2) Insert the lever in the grounding switch actuation shaft and turn anticlockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in disconnected Switch closing operation from the open position 1) Move the actuation shaft access handle in the grey zone to its lower 2) Insert the lever in the switch-disconnector actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in closed Fig. 5.4: Opening operation from grounding position in CGM.3-L Fig. 5.5: Closing operation from open position in CGM.3-L

24 24 Recommended sequence of operations General Instructions Opening operation from the switchdisconnector closed position 1) Move the actuation shaft access handle in the grey zone to its lower 2) Insert the lever in the switch-disconnector actuation shaft and turn anticlockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in disconnected Grounding operation from the open position 1) Move the actuation shaft access handle in the yellow zone to its lower 2) Insert the lever in the grounding switch actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in grounding Fig. 5.6: Opening operation from switch closed position in CGM.3-L Fig. 5.7: Grounding from open position CGM.3-L

25 General Instructions Recommended sequence of operations Cable test To test the cables in CGM.3-L feeder cubicles, B/BM driving mechanisms with this feature must be ordered. These driving mechanisms allow the operation of going from grounding switch closed to switch-disconnector open, even when the cable compartment cover is open. Thus, the switch-disconnector cannot be changed to the closed position until this cover has been put back. 5.4 CGM.3-S cubicle Switch-disconnector closing operation 1) Move the actuation shaft access handle to its lower 2) Insert the lever in the actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in closed Switch-disconnector opening operation 1) Move the actuation shaft access handle to its lower 2) Insert the lever in the actuation shaft and turn anticlockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in disconnected Fig. 5.9: Opening the switch in CGM.3-S Fig. 5.8: Closing the switch in CGM.3-S

26 26 Recommended sequence of operations General Instructions 5.5 CGM.3-S-Ptd cubicle Opening operation from the grounded position 1) Move the actuation shaft access handle in the yellow zone to its lower 2) Insert the lever in the grounding switch actuation shaft and turn anticlockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in disconnected Closing operation from the open position 1) Move the actuation shaft access handle in the grey zone to its lower 2) Insert the lever in the switch-disconnector actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in closed Fig. 5.10: Opening operation from grounded position in CGM.3-S-Ptd Fig. 5.11: Closing operation from open position in CGM.3-S-Ptd

27 General Instructions Recommended sequence of operations Opening operation from the switchdisconnector closed position 1) Move the actuation shaft access handle in the grey zone to its lower 2) Insert the lever in the switch-disconnector actuation shaft and turn anticlockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in disconnected Grounding operation from the open position 1) Move the actuation shaft access handle in the yellow zone to its lower 2) Insert the lever in the grounding switch actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in grounding Fig. 5.12: Opening operation from switch position closed in CGM.3-S-Ptd Fig. 5.13: Grounding from open position in CGM.3-S-Ptd

28 28 Recommended sequence of operations General Instructions 5.6 CGM.3-S-Pti cubicle Opening operation from the grounded position 1) Move the actuation shaft access handle in the yellow zone to its lower 2) Insert the lever in the grounding switch actuation shaft and turn anticlockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in disconnected Closing operation from the open position 1) Move the actuation shaft access handle in the grey zone to its lower 2) Insert the lever in the switch-disconnector actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in closed Fig. 5.14: Opening operation from grounded position in CGM.3-S-Pti Fig. 5.15: Closing operation from open position in CGM.3-S-Pti

29 General Instructions Recommended sequence of operations Opening operation from the switchdisconnector closed position 1) Move the actuation shaft access handle in the grey zone to its lower 2) Insert the lever in the switch actuation shaft and turn anticlockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in disconnected Grounding operation from the open position 1) Move the actuation shaft access handle in the yellow zone to its lower 2) Insert the lever in the grounding switch actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in grounding Fig. 5.16: Opening operation from switch closed position in CGM.3-S-Pti Fig. 5.17: Grounding from open position in CGM.3-S-Pti

30 30 Recommended sequence of operations General Instructions 5.7 CGM.3-P cubicle Opening operation from the grounded position 1) Move the actuation shaft access handle to its lower 2) Insert the lever in the grounding switch actuation shaft and turn anticlockwise. 3) Remove the lever. The handle returns to its original 4) Verify that the cubicle is in disconnected Switch-disconnector closing operation from the open position (using the BR-A driving mechanism) 1) Move the actuation shaft access handle to its lower 2) Insert the lever in the switch-disconnector actuation shaft and turn clockwise. In the same turn, the switch-disconnector is closed and the retaining springs are charged. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in closed Fig. 5.18: Opening operation from grounded position in CGM.3-P Fig. 5.19: Closing operation from open position in CGM.3-P

31 General Instructions Recommended sequence of operations Opening operation from the switchdisconnector closed position 1) The switch can be opened manually, using the push-button on the front of the cubicle, an opening coil, or due to action by the fuses. 2) Verify that the cubicle is in disconnected Grounding operation from the open position 1) Move the actuation shaft access handle to its lower 2) Insert the lever in the grounding switch actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in grounding Fig. 5.20: Opening operation from switch closed position in CGM.3-P Fig. 5.21: Grounding from open position in CGM.3-P

32 32 Recommended sequence of operations General Instructions Selection of Recommended Fuses The fuses recommended for use in the fuse protection functional unit are defined according to tests carried out by the manufacturers. The following table shows the recommended fuse ratings according to the U r /P transf. ratio: Ur Rated Transformer Power WITHOUT OVERLOAD [kva] Line [kv] * Remarks: General operating conditions: Without overload, and temperature < 104 ºF (40 ºC). The values marked with an ( * ) correspond to SSK-type fuses. Maximum permitted power loss for a fuse: < 75 W. Recommended fuses: SIBA 20/36 kv, type HH, medium type striker For other brands of fuses and for protection with overload, consult Ormazabal. Temperature-rise testing of the fuse switch assembly, according to IEC Fuse replacement sequence If any of the 3 fuses blows, the switch-disconnector (a) will open automatically; this is indicated by the red position indicator (b) located on the front of the driving mechanism compartment. In order to replace the fuses, the following procedures must be followed: 1) Close the grounding switch (c). 2) Remove the cable and fuse compartment access cover by pulling the handle (d) up. Fig. 5.22: Fuse tripping indication in CGM.3-P As an option, an auxiliary blown fuse indication for any of the 3 fuses is also available. More precisely, it consists of a normally open contact (NO) plus a normally closed contact (1NO + 1NC) for auxiliary circuits, such as an illuminated indication showing that any of the fuses has blown. Fig. 5.23: Opening the cable compartment cover 3) Pull up the handle on the fuse holder cover until the locking clip is unhooked and then pull sharply outwards to open the fuse holder.

33 General Instructions Recommended sequence of operations 33 Fig. 5.26: Changing the medium voltage fuse 6) Insert the fuse holder carriage in its compartment by pulling it inward. Fig. 5.24: Opening the fuse holder 4) Remove the fuse holder carriage by pulling it outward. Fig. 5.25: Removing the fuse holder carriage 5) Replace the blown fuse, taking special care with the striker as shown in the figure. CAUTION Make sure that the end of the new fuse with the striker faces the carriage insulator end. It is advisable to change all three fuses, even if only one of them appears to be damaged. Fig. 5.27: Inserting the fuse holder carriage CAUTION Before inserting the fuse holder carriage in the fuse protection cubicle, ensure that both the carriage as well as the inside of the fuse holder are properly cleaned.

34 34 Recommended sequence of operations General Instructions 7) Reset the fuse striker by pressing downward with the thumb. 9) Place the fuse and cable compartment access cover (a) by pushing it downward and ensuring it is locked on the CGM.3-P cubicle, taking into account that the green fuse status indicator (b) enables it to be installed. Fig. 5.28: Resetting the striker in the fuse holder cover 8) Close the cover and check that all the strikers have been reset. Fig. 5.30: Closing the cable compartment cover in CGM.3-P 10) Commission the cubicle, following the instructions in section 5.7 of this document, which correspond to the opening operation in the CGM.3-P cubicle. Fig. 5.29: Closing the fuse holder

35 General Instructions Recommended sequence of operations CGM.3-RB with grounding Opening operation from the grounded position 1) Move the actuation shaft access handle in the yellow zone to its lower 2) Insert the lever in the grounding switch actuation shaft and turn anticlockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in disconnected Grounding operation from the open position 1) Move the actuation shaft access handle in the yellow zone to its lower 2) Insert the lever in the grounding switch actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Verify that the cubicle is in grounding Fig. 5.31: Opening operation from grounding position in CGM.3-RB with grounding Fig. 5.32: Grounding from open position in CGM.3-RB with grounding

36 36 Recommended sequence of operations General Instructions 5.9 CGM.3-V cubicle with driving mechanism A(M)V Opening operation from the grounded position Initial conditions: Ground switch closed and circuit-breaker closed. 1) Move the access handle in the yellow zone to its lower 2) Insert the lever in the grounding actuation shaft and turn anticlockwise. 3) Remove the lever, the handle returns to its original 4) Open the circuit-breaker by pressing the 0 button on the front push-button and check the status indicator. 5) Verify that the cubicle is in disconnected Fig. 5.33: Disconnection from grounded position in CGM.3-V

37 General Instructions Recommended sequence of operations Closing operation from the open position Initial conditions: Grounding switch open, circuitbreaker open and springs charged. 1) Move the access handle in the grey zone to its lower 2) Insert the lever in the switch-disconnector actuation shaft and turn clockwise. 3) Remove the lever, the handle returns to its original 4) Close the circuit-breaker by pressing button I, and check the status indicator. Manual Driving Mechanism (AV): Charge the springs, actuating the charging lever until it indicates that the spring is charged. Once the spring has been charged, close the switch by pressing the close button; then check the status indicator and whether voltage is present in the ekorvpis unit. Motor Driving Mechanism (AMV): Close the switch by pressing the closing button; then check the status indicator and whether voltage is present in the ekorvpis unit. Fig. 5.34: Connection from open position in CGM.3-V Opening operation from the closed position Initial conditions: Circuit-breaker closed, grounding switch open and springs charged. 1) Open the circuit-breaker by pressing the 0 opening button on the front push-button and check the status indicator. 2) Check that no voltage is present using the ekorvpis unit. 3) Move the access handle in the grey zone to its lower 4) Insert the lever in the switch-disconnector actuation shaft and turn anticlockwise. 5) Remove the lever, the handle returns to its original 6) Verify that the cubicle is in disconnected

38 38 Recommended sequence of operations General Instructions Grounding operation from the open position Initial conditions: Circuit-breaker open and grounding switch open with springs charged. 1) Close the circuit-breaker by pressing the I close button and check the status indicator. 2) Check that no voltage is present using the ekorvpis unit. 3) Move the access handle in the yellow zone to its lower 4) Insert the lever in the grounding switch actuation shaft and turn clockwise. 5) Remove the lever, the handle returns to its original 6) Verify that the cubicle is in grounding Fig. 5.35: Disconnection from closed position in CGM.3-V

39 General Instructions Recommended sequence of operations CGM.3-V cubicle with driving mechanism A(M)V (3G) or RA(M)V (3G) Opening operation from the grounding position Initial conditions: Ground switch closed and circuit-breaker closed. 1) Move the access handle in the yellow zone to its lower 2) Insert the lever in the grounding actuation shaft and turn anticlockwise. 3) Remove the lever. The handle returns to its original Fig. 5.36: Grounding from open position in CGM.3-V When undertaking work with the cubicle powered down, it is mandatory to interlock the grounding position with either a padlock or a safety lock.

40 40 Recommended sequence of operations General Instructions tight. Once the spring has been tightened, close the switch by pressing the close button; then check the status indicator and whether voltage is present in the ekorvpis unit. Motor Driving Mechanism (AMV): Close the switch by pressing the closing button; then check the status indicator and whether voltage is present in the ekorvpis unit. Fig. 5.37: Opening from ground for AV (3G) mechanisms Closing operation from the open position Initial conditions: Grounding switch open, circuitbreaker closed and springs charged. 1) Open the circuit-breaker by pressing the 0 button on the front push-button and check the status indicator. 2) Move the access handle in the grey zone to its lower 3) Insert the lever in the disconnector actuation shaft and turn clockwise. 4) Remove the lever. The handle returns to its original 5) Close the circuit-breaker by pressing button I, and check the status indicator. Manual Driving Mechanism (AV): Charge springs, operating the charge lever (see Section Spring charging lever for CGM.3-V), until the spring is shown as

41 General Instructions Recommended sequence of operations 41 Fig. 5.38: Connection from open position for AV (3G) mechanisms Opening operation from the closed position Initial conditions: Circuit-breaker closed, grounding switch open and springs charged. 1) Open the circuit-breaker by pressing the 0 opening button on the front push-button and check the status indicator. 2) Check that no voltage is present using the ekorvpis unit. 3) Move the handle in the grey zone to its lower 4) Insert the lever in the disconnector actuation shaft and turn anticlockwise. 5) Remove the lever. The handle returns to its original

42 42 Recommended sequence of operations General Instructions Fig. 5.39: Disconnection from closed position for AV (3G) mechanisms Grounding operation from the open position Initial conditions: Circuit-breaker open and grounding switch open with springs charged. 1) Close the circuit-breaker by pressing the I close button and check the status indicator. 2) Check that no voltage is present using the ekorvpis unit. 3) Move the access handle in the yellow zone to its lower 4) Insert the lever in the grounding switch actuation shaft and turn clockwise. 5) Remove the lever. The handle returns to its original

43 General Instructions Recommended sequence of operations 43 Fig. 5.40: Grounding from open position for AV (3G) mechanisms When undertaking work with the cubicle powered down, it is mandatory to interlock the grounding position with either a padlock or a safety lock.

44 44 Interlocks General Instructions 6 Interlocks The CGM.3 switchgear incorporates safety locks required to ensure the following conditions: 1) The switch-disconnector and the grounding switch cannot both be in closed position at the same time. 2) The cubicles have a safety lock which prevents access to the medium voltage cable compartment while the grounding switch is not closed. In normal operation, this grounding switch cannot be opened if the cable compartment cover is not in place. 6.2 Locking with a Key Lock (optional) Both the switch-disconnector and the grounding switches can have an optional locking interlock device, which allows its operation to be blocked in both the open and closed positions. 6.1 Locking with a Padlock The cubicles are supplied with an independent padlock interlock for both the switch-disconnector in its closed or open positions and the grounding switch in its closed or open positions. Padlocks with ring diameters of between 0.3 inches (8 mm) and 0.4 inches (11 mm) can be used. Fig. 6.2: Interlocking in CGM.3-L cubicle using keys Fig. 6.1: Interlocking in CGM.3-L cubicle using padlock and keys

45 General Instructions Maintenance 45 7 Maintenance DANGER For safety reasons, maintenance operations performed directly on the driving mechanism must be performed WITHOUT any actuating lever inserted. CAUTION Do not refill the switchgear. Switchgear is tested against SF 6 leakage for 30 years. The live parts of the main circuit and switching equipment do not require inspection or maintenance, as they are completely insulated in SF 6, and therefore free from any influence from the external environment. The driving mechanisms have also satisfactorily passed the endurance tests (class M1/M2 for the switchdisconnector and class M1 for the grounding switch, according to IEEE C37.74). These mechanisms must be inspected when used under extreme conditions (dust, salt, pollution). It is advisable to carry out at least one operation during the inspections. Components manufactured from galvanized sheet steel have been painted to ensure their resistance to corrosion. Any scratches, dents or similar on them must be repaired to prevent corrosion. 7.1 Voltage presence indicator test To test the ekorvpis voltage presence indicator, connect it to a 110 V ac / 230 V ac power supply. To do this, disconnect the ekorvpis unit from the cubicle, and, using 0.16 inches (4 mm) terminals, apply the voltage between the test point for the phase to be checked and the ground test point. No polarity is defined for 110 V ac / 230 V ac voltage, so either the phase or neutral conductor can be connected. If a flashing signal is observed, the device is working correctly. In order to properly test the ekorvpis, this check should be carried out for all three phases. Fig. 7.1: ekorvpis unit device CAUTION The voltage presence indication is not sufficient to ensure that the installation has been disconnected from the electricity supply. Before accessing the cable compartments, it is necessary to confirm that the line is grounded. The ekorvpis voltage detection unit can be replaced if necessary. To do so, loosen until removing the two screws on the top right and bottom left of the indicator using a medium size Philips screwdriver. The ekorvpis unit can then be disconnected from the base without needing to power down the line. 7.2 Acoustic grounding prevention alarm test To test that the ekorsas acoustic alarm is working correctly, connect the ekorvpis voltage presence indicator to 110 V ac / 230 V ac by means of 0.16 inches (4 mm) terminals, which are connected to the indicator between the ground test point and the test point for the L1 phase. The auxiliary power supply is maintained for 5 minutes. As the handle is moved to insert the lever in the grounding shaft in order to carry out the operation, the alarm starts to sound and continues to sound for at least 30 seconds. It stops when the handle is released.

46 46 Maintenance General Instructions The ekorsas alarm can be replaced if necessary, since it is joined to the associated elements with two friction-fit PCB connectors: 1) 3-pin connector, polarized for the voltage presence indicator. 2) 2-pin connector for the lever microswitch. The procedure is as follows: 1) Remove the driving mechanism cover. 2) Unscrew the ekorsas unit to remove it. 3) Undo both connectors and replace the damaged unit; then connect it to the lever microswitch (2-pin connector) and the voltage indicator (polarized 3- pin connector) Connecting the ekorsas unit 1 Connection to the lever microswitch in the grounding shaft 2 Connection to the voltage presence indicator Fig. 7.2: ekorsas unit device 7.3 Specific maintenance for the CGM.3-V cubicle The driving mechanisms and other elements outside the gas tank may require preventive maintenance; the frequency of this maintenance depends on the existing environmental conditions (harsh environments, dust, extreme temperatures, etc.), and should be established based on the installer's experience and their responsibility. The maintenance should take place every 5 years or 2000 operating cycles, unless, based on the conditions of use, the user and Ormazabal consider otherwise. For further information on the recommended Preventive Maintenance sequence for CGM.3-V, please contact Ormazabal.