Medium-Voltage Switchgear OPERATING INSTRUCTIONS

Transcription

1 Medium-Voltage Switchgear Circuit-Breaker Switchgear Type NXAIR: Factory-Assembled, Type-Tested and Metal- Enclosed Switchgear for Indoor Installation, Air-Insulated Loss of Service Continuity Category: LSC 2B (Metal-Clad) Partition Class PM (Metallic Partition) Internal Arc Classification: IAC A FLR, I SC = 31.5 ka, t = 1s Arc Duration Medium-Voltage Switchgear OPERATING INSTRUCTIONS Order No.: BX3300-0LA00-0AB1 Revision: 02 Issue:

2 About these Instructions These instructions do not purport to cover all details or variations in equipment, nor to provide for every possible contingency to be met in connection with operation. For details about technical design and equipment like e.g. technical data, secondary equipment, circuit diagrams, please refer to the order documents. The switchgear is subject to continuous technical development within the scope of technical progress. If not stated otherwise on the individual pages of these instructions, we reserve the right to modify the specified values and drawings. All dimensions are given in mm. For further details, e.g. about additional equipment, please refer to catalog HA Should further information be desired or should particular problems arise which are not covered sufficiently by these instructions, the matter should be referred to the competent Siemens department. The contents of this instruction manual shall not become part of or modify any prior or existing agreement, commitment or relationship. The Sales Contract contains the entire obligations of Siemens. The warranty contained in the contract between the parties is the sole warranty of Siemens. Any statements contained herein do not create new warranties or modify the existing warranty. 2 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

3 Contents Safety instructions Signal terms and definitions General instructions Due application Qualified personnel... 5 Description Features Panel types Circuit-breaker panel Disconnecting panel Metering panel Bus sectionalizer Contactor panel Panel design Interlocks Accessories Technical data Complete switchgear Operating conditions Vacuum circuit-breaker type 3AE Contactor type 3TL Operating instructions for circuit-breaker type 3AE and contactor type 3TL Service information Maintenance Visual inspection Preventive maintenance Switchgear extension Spare part orders Replacement of panels and components Disposal Operation NXAIR Safety instructions Panel operation Control elements at the front side of the panel Operating tools Opening and closing the high-voltage door Racking the withdrawable circuit-breaker to service position Racking the withdrawable circuit-breaker to test position Racking the withdrawable contactor to service position Racking the withdrawable contactor to test position Closing the circuit-breaker Opening the circuit-breaker Charging the spring manually Closing or opening the contactor Feeder earthing Feeder de-earthing Busbar earthing Busbar de-earthing Access to connection compartment Taking the withdrawable circuit-breaker, disconnector link and/or withdrawable metering unit out of the panel Inserting the withdrawable circuit-breaker and/or disconnector link in a panel Taking the withdrawable contactor out of the panel Inserting the withdrawable contactor in the panel Emergency operation of the feeder earthing switch without the withdrawable circuit-breaker inserted in the panel Verification of safe isolation from supply Connecting earthing and short-circuit facility Manual operation of shutters in circuit-breaker and disconnecting panels Manual operation of shutters in the contactor panel Application of HV HRC fuse-links Normal current of the HV HRC fuse-links Motor starting currents Coordinating the components of the motor circuit Key-operated interlocking with Ronis locks Trouble shooting Index BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 3

4 Safety instructions Safety instructions 1 Signal terms and definitions DANGER! as used in these instructions, this means that personal injuries can occur if the relevant precautionary measures are not taken. Observe the safety instructions. ATTENTION! as used in these instructions, this means that damage to property or environment can occur if the relevant precautionary measures are not taken. Observe the safety instructions. NOTE! as used in these instructions, this points at facilitations of work, particularities for operation or possible maloperation. Observe the notes. Symbols used Operation symbol: Identifies an operation. Asks the operator to perform an operation. r Result symbol: Identifies the result of an operation. 2 General instructions Independently of the safety instructions given in these operating instructions, the local laws, ordinances, guidelines and standards for operation of electrical equipment as well as for labor, health and environmental protection apply. Any kind of modification on the product or alteration of the product must be coordinated with the manufacturer in advance, as uncoordinated modifications or alterations can cause the expiration of warranty claims, cause danger to life, limb and other legally protected interests, and the fulfillment of the type tests (according to IEC ) may not be guaranteed anymore. The edition of the standard is only mentioned in the test report applicable at the time of switchgear manufacture. Five Safety Rules of Electrical Engineering The Five Safety Rules of Electrical Engineering must generally be observed during operation of the products and components described in these operating instructions: Isolate. Secure against reclosing. Verify safe isolation from supply. Earth and short-circuit. Cover or barrier adjacent live parts. 4 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

5 Safety instructions 3 Due application The switchgear corresponds to the relevant laws, prescriptions and standards applicable at the time of delivery. If correctly used, they provide a high degree of safety by means of logical mechanical interlocks and shockproof metal enclosure of live parts. DANGER! The perfect and safe operation of this switchgear is conditional on: Observance of operating and installation instructions. Qualified personnel. Proper transportation and correct storage of the switchgear. Correct installation and commissioning. Diligent operation and maintenance. Observance of the instructions applicable at site for installation, operation and safety. 4 Qualified personnel Qualified personnel in accordance with these instructions are persons who are familiar with maintenance and operation of the product and have appropriate qualifications for their work. Furthermore, qualified personnel must have the following training and instruction or authorization: Training and instruction or authorization to switch on, switch off, earth and identify power circuits and equipment / systems as per the relevant safety standards Training and instruction regarding the applicable specifications for the prevention of accidents and the care and use of appropriate safety equipment Training in first aid and behavior in the event of possible accidents BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 5

6 Description Description Fig. 1: Front view of circuit-breaker panel Fig. 2: Front view of contactor panel 5 Features The withdrawable circuit-breaker and contactor switchgear types NXAIR have the following features: Factory-assembled, type-tested, metal-enclosed and metal-clad switchgear for indoor installation according to IEC / VDE Loss of service continuity category: LSC 2B (metal-clad) Partition class PM (metallic partition) Internal arc classification: IAC A FLR, I SC 31.5 ka, t = 1s arc duration All switching operations can be carried out at the panel front with the high-voltage door closed Standard degree of protection IP3XD for the metal enclosure according to IEC 60529/ VDE 0470 Part 1 Metallic, positively driven shutters protect against accidental contact with live parts inside the panel Logical interlocks between actuation, circuit-breaker, disconnecting function and earthing switch operating mechanism prevent maloperation Earthing of feeders by means of earthing switches with short-circuit making capacity Mechanical position indicators for the withdrawable part and the earthing switch integrated in the mimic diagram at the panel front Further information to design features and design options is given in catalog HA Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

7 Description 6 Panel types The withdrawable circuit-breaker switchgear NXAIR consists of various panel types which can be freely combined according to the requirements. The following panel types are available: Circuit-breaker panel Disconnecting panel Metering panel Bus sectionalizer busbar connection panel Contactor panel 6.1 Circuit-breaker panel The circuit-breaker panel is the basic panel type of NXAIR. The circuit-breaker panel can fulfil the function "incoming feeder" or "outgoing feeder". It can carry or switch all rated normal currents of the busbar and the feeders as well as the short-circuit currents quoted on the respective rating plates. Basic components Additional components Busbars Withdrawable circuit-breaker Mechanically coupling low-voltage plug connector between the withdrawable part and the panel Panel connection for cables or bars Current transformers Fixed-mounted voltage transformers in cable compartment and busbar compartment Voltage transformers on withdrawable part, disconnectable Earthing switch with short-circuit making capacity in cable compartment and busbar compartment Surge arresters at the cable connection Surge limiters at the cable connection Insulated busbar system Busbar transverse partition Sockets for capacitive voltage detection BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 7

8 Description 6.2 Disconnecting panel The disconnecting panel is an additional panel to the basic NXAIR panel type. The disconnecting panel carries electrical power. It cannot switch electrical power. The disconnector link is therefore protected by a padlock against arbitrary movement (standard version). Basic components Additional components Busbars Withdrawable disconnector link Mechanically coupling low-voltage plug connector between the withdrawable part and the panel Panel connection for cables or bars Current transformers Fixed-mounted voltage transformers in cable compartment and busbar compartment Earthing switch with short-circuit making capacity in cable compartment and busbar compartment Surge arresters at the cable connection Surge limiters at the cable connection Insulated busbar system Busbar transverse partition Sockets for capacitive voltage detection 6.3 Metering panel The metering panel is used to measure the voltage of the busbars. To separate the voltage transformer set, the metering panel is equipped with a withdrawable part. Basic components Busbars Withdrawable metering unit Mechanically coupling low-voltage plug connector between the withdrawable part and the panel Fixed-mounted voltage transformer set on withdrawable part with three single-pole voltage transformers, optionally with or without fuses 6.4 Bus sectionalizer A bus sectionalizer consists of two NXAIR panels: A circuit-breaker panel and a disconnecting panel, or a circuit-breaker panel and a bus riser panel. Basic components Busbars Withdrawable circuit-breaker Disconnector link Mechanically coupling low-voltage plug connector between the withdrawable parts and the panels Connection bars in connection compartment at the bottom 8 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

9 Description Additional components One or two current transformer sets One or two voltage transformer sets Insulated busbar system Busbar transverse partition Sockets for capacitive voltage detection Busbar earthing switch Fixed-mounted voltage transformers in cable compartment and busbar compartment Voltage transformers on withdrawable part, disconnectable 6.5 Contactor panel The contactor panel is an additional panel to the basic NXAIR panel type. The contactor panel is especially suitable for operational switching of loads with a high switching rate. Short-circuit and overload protection is taken over by HV HRC fuse-links. Basic components Additional components Busbars Withdrawable contactor with HV HRC fuse-links Automatically coupling low-voltage plug connector between the withdrawable part and the panel Panel connection for cables Fused control transformer Current transformers Surge limiters BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 9

10 Description 7 Panel design Basic design Enclosure made of galvanized sheet-steel Front doors and lateral switchgear end walls are powder-coated with resistant epoxy resin material Individual modular compartments in solid-wall design Modular compartments bolted together a s d f g Metallic shutters for high-voltage contacts Low-voltage connection, plug-in type Operating and interlocking unit for withdrawable circuit-breaker, disconnector link and withdrawable metering unit Vacuum interrupters Operating and interlocking unit for racking the withdrawable part and for earthing Make-proof earthing switch h j Cable connection for up to 4 cables per phase k Voltage transformer l Contact system ; Block-type current transformer A Bushing-type insulator S Busbars D Pressure relief duct A B C D E Switching device compartment Busbar compartment Connection compartment Withdrawable circuit-breaker Low-voltage compartment Fig. 3: Sectional view of the circuit-breaker panel design 10 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

11 Description a Metallic shutters for high-voltage contacts s Contact system d HV HRC fuse-links f Vacuum contactor g Operating and interlocking unit for racking the withdrawable part and for earthing h Cable connection for up to 2 cables per phase j Make-proof earthing switch k Block-type current transformer l Busbars ; Pressure relief duct A B C D E Switching device compartment Busbar compartment Connection compartment Withdrawable contactor Low-voltage compartment Fig. 4: Sectional view of the contactor panel design Further information to design features and design options is given in catalog HA BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 11

12 Description 8 Interlocks Mechanical interlocks Action Internal preconditions of the withdrawable part Inserting the withdrawable part in the panel Withdrawable part in test position on service truck Pulling the withdrawable part out of the panel None Racking the withdrawable part to service position Withdrawable part inserted and interlocked Low-voltage connector plugged in High-voltage door closed Circuit-breaker in OPEN position / contactor in OPEN position Feeder earthing switch in OPEN position Plug low-voltage connector in Consistent coding between connector and withdrawable part fulfilled * Racking the withdrawable part to test position Circuit-breaker in OPEN position / contactor in OPEN position Closing the circuit-breaker / closing the Withdrawable part in interlocked end position (test or service position) contactor Opening the circuit-breaker / opening the None contactor Closing the contactor HV HRC fuse-links not tripped Operating the feeder earthing switch Withdrawable part in interlocked test position Operating the busbar earthing switch None (see note below) Opening the high-voltage door Withdrawable part in test position * Not feasible with withdrawable vacuum contactor Additional electromagnetic interlocks (optional) Action Addtional preconditions Racking the withdrawable part General or external release Operating the feeder earthing switch General or external release * Operating the busbar earthing switch General or external release * Not feasible with withdrawable vacuum contactor NOTE! The busbar earthing switch is secured against unintentional operation by means of a padlock or an electromagnetic interlock. Panel versions with electromagnetic interlocking are identified on the high-voltage door with labels for interlocking the disconnecting function and/or the earthing switch. 12 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

13 Description Additional padlock interlock (optional) Action Racking the withdrawable part Operating the feeder earthing switch Operating the busbar earthing switch Opening the high-voltage door Addtional preconditions Key for padlock Key for padlock Key for padlock Key for padlock Additional interlock with lock systems (optional) Lock system type Ronis Action Racking the withdrawable part to service position Switch feeder earthing switch to CLOSED position Switch feeder earthing switch to OPEN position Addtional preconditions Access to actuating openings only after opening the Ronis lock Access to actuating openings only after opening the Ronis lock Access to actuating openings only after opening the Ronis lock 9 Accessories The switchgear is always supplied with the following standard accessories: Racking crank with protective shield for moving the withdrawable part. Push rod for closing / opening the circuit-breaker mechanically Hand crank with freewheel for charging the circuit-breaker manually Operating lever for feeder and busbar earthing switch Double-bit key for low-voltage door Double-bit key for withdrawable part Service truck for withdrawable parts Installation and operating instructions The following accessories are optionally available: Slip-on levers for shutter operation (set for left and right side) Additional service truck for withdrawable parts Wall-mounting holder for accessories Earthing accessories for 31.5 ka/1 s Emergency tool adapter for feeder earthing switch without withdrawable part inserted in the panel Plug-in voltage indicator IEC /VDE 0682, Part 415, LRM system for capacitive voltage tap Test unit for voltage indicator Touch-up kit for minor paint damage Touch-up paint, 1 kg tin Coupling unit, 64-pole - 3 m long connection between withdrawable part and panel for function testing Tin of Longterm 2 grease (used on: contact system, earthing switch knifes) Shell Vaseline 8422 DAB 8 (used on: busbar connection and earth connection) Grease Isoflex TOPAS L32 (used on: shutter rods, withdrawable unit guide) Test equipment for pressure switch Phase comparison test units BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 13

14 Description 10 Technical data 10.1 Complete switchgear Electrical data (maximum values) Electrical data Rated voltage U r [kv] Rated short-duration power-frequency withstand voltage U d [kv] 28 1) 38 Rated lightning impulse withstand voltage U p [kv] 75 2) 95 Rated frequency f r [Hz] 50/60 Rated short-circuit breaking current I sc [ka] 31.5 Rated short-circuit making current I ma [ka] 82 Rated peak withstand current I p [ka] 82 Rated short-time withstand current I k [ka] 31.5 Rated duration of short-circuit t k [s] 1-3 Rated normal current of the busbar I r [A] 2500 Rated normal current of feeders I r [A] 2500 Rated normal current for bus sectionalizer I r [A] 2500 Rated normal current of feeders, contactor panel I r [A] 310 3) 1) 42 kv optional 2) Contactor panel max. 60 kv at 7.2 kv and max. 40 kv across the open interrupter Contactor panel max. 75 kv at 12 kv and max. 60 kv across the open interrupter 3) Depending on rated current of HV HRC fuse-links Dimensions per panel in mm Panel type NXAIR Dimension [mm] Circuit-breaker panel 1000 A Width A 800 Disconnecting panel 1250 A 800 Bus sectionalizer 1250 A 2 x 800 Bus sectionalizer 2500 A 2 x 1000 or 1 x 1000 with 1 x 800 Busbar connection panel 2500 A 800 Contactor panel 310 A 435 Metering panel 800 Standard Height 2300 With high low-voltage compartment 2350 With natural ventilation 2300 With additional compartment for busbar components 2350 Contactor panel, standard 2300 Contactor panel with high low-voltage compartment 2350 Single busbar Depth 1350 Double busbar, back-to-back arrangement 2850 Contactor panel Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

15 Description Dimensions of the switchgear room Pressure relief system To install the switchgear, the switchgear room must have certain minimum dimensions. Please observe the following illustrations. Depending on the room height, the pressure relief system of switchgear with evacuation ducts must be led outside the switchgear building: Room height [mm] Rated voltage U r [kv] Rated short-time withstand current I k [ka] Design with evacuation ducts to the outside of the building 2500 to compulsory optional compulsory compulsory NXAIR, single-row arrangement Single-row arrangement (plan view) for single-busbar switchgear For width (B) and depth (T) of the panel see table mentioned above. 1) For panel replacement: Control aisle 1410 mm 2) For cable connection from the rear: 800 mm For back-to-back and face-to-face arrangement, the room dimensions apply accordingly to those for single-row arrangement. For back-to-back arrangement, a 1200 mm wide control aisle is required on the left or on the right of the switchgear. Fig. 5: Dimensions of switchgear room, NXAIR Type of protection Standard Optional Partition in switching device compartment IP3XD IP4X IP2X Basic prescriptions and standards The indoor switchgear complies with the following prescriptions and standards: IEC/EN standard Switchgear Switching devices Circuit-breakers Contactors Disconnectors/earthing switches Voltage detecting systems Insulation Degree of protection Instrument transformers Current transformers Voltage transformers Installation, erection BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 15

16 Description Electromagnetic compatibility - EMC The a.m. standards as well as the "EMC Guide for Switchgear"* are applied during design, manufacture and erection of the switchgear. Installation, connection and maintenance have to be performed in accordance with the stipulations of the operating instructions. For operation, the legal stipulations applicable at the place of installation have to be observed additionally. In this way, the switchgear assemblies of this type series fulfill the basic protection requirements of the EMC guide. The switchgear operator / owner must keep the technical documents supplied with the switchgear throughout the entire service life, and keep them up-to-date in case of modifications of the switchgear. * (Dr. Bernd Jäkel, Ansgar Müller; Medium-Voltage Systems - EMC Guide for Switchgear; A&D ATS SR/PTD M SP) Rating plates Each panel has a rating plate fixed on the inside of the high-voltage and the low-voltage door containing the following information: a s d f g h j k Switchgear type Serial number Technical data Internal arc classification Number of operating instructions for the panel Year of manufacture Panel number Loss of service continuity category, partition class Fig. 6: Fig. 3:Rating plate The block-type current and voltage transformers have their own type plates. A copy is provided on the inside of the high-voltage door. IAC classification The data (see item f) describes the internal arc classification of the panel according to IEC The entries IAC A FLR 25 ka 1 s in the example shown mean: IAC: Internal Arc Classification A: Type of accessibility A; for authorized personnel only; switchgear in closed electrical service location; access for expert personnel only. F: Internal arc classification for the front side (Front) L: Internal arc classification for the lateral sides (Lateral) R: Internal arc classification for the rear side (Rear) 25 ka: Tested short-circuit current 1s: Test duration The IAC classification is referred to each panel. The data on the rating plate (see item f) describes the areas classified for the corresponding panel. 16 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

17 Description 10.2 Operating conditions NXAIR switchgear is designed for normal indoor operating conditions according to IEC In this respect, the following limit values for the ambient air temperature must be complied with as a minimum: Limit value Temperature [ºC] Maximum value + 40 Minimum value - 5 Maximum value of 24-hour mean + 35 The site altitude may be 1000 m above sea level as a maximum. When NXAIR switchgear is used in regions with high air humidity or considerable temperature fluctuations, there is risk of condensation. The formation of condensation should be an exception under normal operating conditions. To prevent condensation, rusting or other serious consequences, the associated preventive measures must be taken by installing electrical heating equipment in the switchgear. The ambient air must not be significantly polluted by dust, smoke, corrosive and/or flammable gases, vapors or salt Vacuum circuit-breaker type 3AE The vacuum circuit-breaker type 3AE SION is a 3-pole indoor circuit-breaker for ratings from 3 kv to 3 kv. Rating plate A rating plate is provided on the operating mechanism unit of every circuit-breaker type 3AE SION. a Rating plate type 3AE SION BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 17

18 Description 10.4 Contactor type 3TL6 The vacuum contactor type 3TL6 is a 3-pole indoor contactor for ratings from 7.2 kv to 12 kv. Rating plate A rating plate is provided on the operating mechanism unit of every contactor type 3TL6. a Rating plate type 3TL6 Operating instructions for circuit-breaker and contactor 10.5 Operating instructions for circuit-breaker type 3AE and contactor type 3TL6 For circuit-breakers type 3AE and contactors type 3TL6, separate operating instructions are available with detailed instructions and information. The operating instructions are supplied as standard with every circuit-breaker type 3AE and contactor type 3TL6. Additional operating instructions in different languages can be ordered at the regional Siemens representative. Fig. 7: Operating instructions for circuitbreaker type 3AE SION Fig. 8: Operating instructions for contactor type 3TL6 18 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

19 Description Available operating instructions for circuit-breaker type 3AE Language German Polish Russian Italian English French Spanish Portuguese Romanian Order number of operating instructions BA_ _0A_001 BA_ _0-_001 BA_ _0-_001 BA_ _0-_001 BA_ _0-_001 BA_ _0-_001 BA_ _0-_001 BA_ _0-_001 BA_ _0-_001 Available operating instructions for contactor type 3TL6 Language German-English French-Spanish German-Russian Order number of operating instructions BA_ _0J_001 BA_ _0J_001 BA_ _0J_ BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 19

20 Description 11 Service information 11.1 Maintenance Maintenance ensures undisturbed and uninterrupted operation of the switchgear. The maintenance measures are divided into the following fields: Visual inspection Preventive maintenance ATTENTION! Non-observance of the following instructions can endanger people or damage the switchgear. All measures within the scope of maintenance may only be executed by qualified personnel. Furthermore, the relevant IEC standards and the local and site-related safety regulations must be observed. For questions about maintenance measures, please contact your regional Siemens representative. Time schedule for maintenance measures Besides the recommended maintenance intervals, additional maintenance measures may be required for operational reasons. Recommended time schedule for maintenance measures Measure Interval Operational fact Visual inspection Preventive maintenance Every year or at the operator's discretion Every 10 years, or depending on operational facts, or at the operator's discretion E.g. after a short-circuit breaking/making operation of a circuit-breaker and/or an earthing switch when the permissible number of operating cycles has been reached 20 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

21 Description 11.2 Visual inspection The visual inspection is performed every year or at the operator's discretion. General check for paint damages on all panels of a switchgear assembly in the area of the front doors, the lateral and the rear termination. If required, repair damages. General check of the switchgear for dust layers, especially of the absorber units and ventilation units in the pressure relief duct. Fig. 9: View from above onto an absorber unit in the pressure relief duct Clean dust layers on the units with customary vacuum cleaners without damaging the wire frames a or ventilation slots a. Fig. 10: View from above onto a ventilation unit in the pressure relief duct BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 21

22 Description Fig. 11: Exemplary view of a ventilated panel with lateral ventilation slots in the high-voltage door (in other panel designs, the ventilation slots are also provided centrally at the bottom). General check for humidity. To do this, open the high-voltage door of the switching device compartment of every third panel and check the switching device compartment for humidity or condensation. For instructions to rack a withdrawable part, see Page 26, "Operation NXAIR". If there is humidity or condensation inside a switching device compartment, determine the cause thereof. To do this, do also observe the climatic conditions of the switchgear room, and arrange for suitable measures such as room ventilation or room heating. General check for partial discharge noises. If there are any partial discharge noises, determine the cause thereof and take adequate countermeasures. Check whether the accessories are complete (see Page 13, "Accessories") Preventive maintenance Perform visual inspection and carry out the necessary maintenance work according to the problems determined. When an earthing switch has performed two short-circuit making operations, maintenance work has to be done by means of a visual inspection of the earthing switch blades and the fixed laminated contacts. If there is any visible erosion, the stressed components must be replaced. To do this, please contact the regional Siemens representative. Built-in equipment such as circuit-breakers, voltage transformers, current transformers, relays, meters, protection equipment, etc. must be serviced and maintained as specified in the associated operating instructions. 22 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

23 Description Carry out maintenance and servicing at shorter intervals (to be specified by the owner) if there is a lot of dust, or if the air is extremely humid and/or polluted. Following the results of the visual inspection (see Page 21, "Visual inspection"), grease the main contacts at: Moving rails Fixed contacts of the earthing switch Bushings a s d Moving rails Fixed contacts of earthing switch Bushings Fig. 12: Circuit-breaker, disconnecting and metering panel BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 23

24 Description Fig. 13: Contactor panel Greases to be used Component Interval Grease - Main fixed contacts of bushings d Shorter intervals (at the Longterm 2 - Fixed contacts of earthing switch s operator's discretion) - Moving rails a Isoflex Topas L32 Independently of the regular visual inspection and preventive maintenance, immediately determine the cause of failures and short circuits, and replace any damaged components Switchgear extension The switchgear can be extended at both ends without modification of existing panels. For switchgear extension, please contact the regional Siemens representative Spare part orders Information required for spare part orders of single components and devices: Type and serial number of the switchgear and the withdrawable part as per rating plates. Precise designation of the device or component, if applicable on the basis of the information and illustrations in the associated instructions, a drawing, sketch or circuit diagram. Spare parts have to be ordered at the regional Siemens representative. 24 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

25 Description 11.6 Replacement of panels and components Replacement of panels For replacement of panels, please contact the regional Siemens representative. Replacement of components The individual components, such as measuring instruments, current transformers, etc., can be replaced. The contact pieces in the bushings are bolted and can be replaced. In case of wear or changed environmental conditions, the contact pieces can be replaced from the front without dismantling any conductor bars. For replacement of components, please contact the regional Siemens representative Disposal NXAIR switchgear is an environmentally compatible product. The panels are made of galvanized sheet metal. The doors and switchgear end walls are powder-coated with resistant epoxy resin material. The switchgear materials should be recycled as far as possible. The switchgear can be disposed of in an environmentally compatible manner in compliance with existing legislation. The components of the switchgear can be recycled as mixed scrap; however, dismantling as far as possible into sorted scrap with a residual mixed-scrap portion is the more environmentally compatible way. Electronic scrap must be disposed of in accordance with the existing regulations. The switchgear consists of the following materials: Sheet metal, galvanized Copper Aluminum Polycarbonate (PC) Cr-Ni steel Epoxy resin Cast resin Fiber-reinforced plastics Rubber materials Ceramic materials Lubricants Bolts, washers, nuts, rivets made of steel As delivered by Siemens, the switchgear does not contain hazardous materials as per the Hazardous Material Regulations applicable in the Federal Republic of Germany. For operation in other countries, the locally applicable laws and regulations must be followed. For further information, please contact the regional Siemens representative BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 25

26 Operation NXAIR 12 Safety instructions DANGER! High voltage! Danger! Do not touch live components. Ensure that the switchgear is only operated by qualified personnel who are familiar with the operating instructions and observe the warnings. DANGER! During operation of electrical equipment and switchgear, parts of this equipment are under dangerous electrical voltage. Mechanical components may move quickly, even remotely controlled. Do not remove covers. Do not reach into openings. Do not touch circuit-breaker poles and operating rods. NOTE! Perfect and safe operation of the switchgear The perfect and safe operation of this switchgear is conditional on correct erection and installation according to the installation instructions. 26 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

27 13 Panel operation 13.1 Control elements at the front side of the panel a s d f g h j k l Door of low-voltage compartment Protection device Locking device for low-voltage door Test sockets for busbar voltage detecting system (type LRM) as additional equipment High-voltage door Opening for charging the spring in the circuit-breaker manually Door handle for opening the high-voltage door Control gate for opening and closing the actuating opening for racking the switching device Actuating opening for racking the switching device ; Actuating opening for inserting the double-bit key to control racking of the withdrawable part A Mechanical position indicator for withdrawable part S Actuating opening for make-proof earthing switch D Control gate for opening and closing the actuating opening for operating the earthing switch mechanism F Mechanical position indicator for earthing switch G Operations counter for circuit-breaker H "Closing spring charged" indicator for circuit-breaker J CLOSED/OPEN indicator of the circuit-breaker K Actuating opening for opening the circuit-breaker L Actuating opening for closing the circuit-breaker Rotary button for opening and closing the actuating opening below Fig. 14: Control elements at the panel front of the circuit-breaker panel BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 27

28 a s d f g h j Door of low-voltage compartment Protection device Locking device for low-voltage door High-voltage door Locking device for high-voltage door Door handle for opening the high-voltage door Control gate for opening and closing the actuating opening for operating the earthing switch mechanism Mechanical position indicator for earthing switch k l Actuating opening for earthing switch ; Actuating opening for racking the switching device A Control gate for opening and closing the actuating opening for racking the switching device S Actuating opening for inserting the double-bit key to control racking of the withdrawable part Fig. 15: Control elements at the panel front of the contactor panel Position indication for withdrawable part and earthing switch Circuit-breaker, disconnecting and metering panels Contactor panel Circuit-breaker CLOSED OPEN Earthing switch CLOSED OPEN - CLOSED OPEN Withdrawable part Service position Faulty position Test position - - Spring energy store in circuit-breaker CHARGED NOT CHARGED 28 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

29 13.2 Operating tools The following operating tools are supplied as accessories: Fig. 16: Racking crank with protective shield for moving the withdrawable part. Fig. 17: Push rod for closing / opening the circuit-breaker mechanically Fig. 18: Operating lever for operation of the feeder or busbar earthing switch Fig. 19: Hand crank for manual charging of the spring in the circuit-breaker BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 29

30 Fig. 20: Slip-on lever for opening the shutters in front of the fixed contacts in the switching device compartment (optional). Fig. 21: Emergency tool adapter to be used exclusively for emergency operation of the feeder earthing switch - without withdrawable part inserted in the panel - in case of electrical failure of the switchgear (optional) Fig. 22: Double-bit key with a diameter of 3 mm for opening and closing the door of the lowvoltage compartment Fig. 23: Double-bit key with a diameter of 5 mm for releasing and interlocking the withdrawable part 30 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

31 Fig. 24: Service truck to insert and remove a withdrawable circuit-breaker, disconnector link and metering unit Fig. 25: Service truck to insert and remove the withdrawable contactor BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 31

32 13.3 Opening and closing the high-voltage door NOTE! The following instructions for opening and closing the high-voltage door apply to: Circuit-breaker panels Disconnecting panels Metering panels Contactor panels Preconditions Procedure Opening high-voltage door of circuit-breaker panel Withdrawable part in test position Pull door handle upwards and open the door. Fig. 26: Opening the high-voltage door of the circuit-breaker panel r High-voltage door is open. 32 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

33 Preconditions Procedure Opening the high-voltage door of the contactor panel Double-bit key available Withdrawable part in test position Insert double-bit key in door lock and turn 90 counter-clockwise. Pull door handle upwards and open the door. Fig. 27: Opening the high-voltage door of the contactor panel r High-voltage door is open BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 33

34 Preconditions Procedure Closing the high-voltage door of the circuit-breaker panel Either without withdrawable part or: Withdrawable part inserted in test position Low-voltage connector plugged in Pull door handle upwards and close the door. Push door handle downwards. Fig. 28: Closing the high-voltage door of the circuit-breaker panel r High-voltage door is closed. 34 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

35 Preconditions Closing the high-voltage door of the contactor panel Double-bit key inserted in door lock. Either without withdrawable part or: Withdrawable part inserted in test position Low-voltage connector couples automatically in the panel. Procedure Pull door handle upwards and close the door. Push door handle downwards. Turn double-bit key 90 counter-clockwise and remove it. Fig. 29: Closing the high-voltage door of the contactor panel r High-voltage door is closed BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 35

36 13.4 Racking the withdrawable circuit-breaker to service position ATTENTION! Please observe: The instructions in this section also apply to the disconnector link and the withdrawable metering unit. ATTENTION! Withdrawable disconnector links cannot switch electrical power on or off. Rack withdrawable disconnector links from test position to service position only if the panel is in de-energized condition. This equally applies to racking from service position to test position. Preconditions for operation Withdrawable circuit-breaker inserted and locked in the panel Low-voltage connector plugged in High-voltage door closed Circuit-breaker in OPEN position Feeder earthing switch in OPEN position Racking crank for moving the withdrawable circuit-breaker available Double-bit key available The actuating opening for racking the withdrawable circuit-breaker is located on the control board of the high-voltage door. Fig. 30: Actuating opening for racking the withdrawable circuit-breaker (padlock on actuating opening of feeder earthing switch is optional) 36 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

37 ATTENTION! If there is no auxiliary voltage, both the electrical and the mechanical interlocks are closed. If the optional interlocks are overridden locally, manual switching operations are possible despite an existing electrical interlock, and this can cause failures. Ensure that the intended manual switching operation has been released externally. Procedure ATTENTION! All interlocks are only released when the withdrawable part is in a stable end position. Rack the withdrawable circuit-breaker, disconnector link and metering unit absolutely until end position. Open lock (optional). Push control gate upwards BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 37

38 To release access to the withdrawable part, insert the double-bit key and turn 90 clockwise. Push the racking crank for moving the withdrawable circuit-breaker onto the operating shaft, and turn clockwise as far as it will go. Remove racking crank for moving the withdrawable part. 38 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

39 Turn the double-bit key 90 clockwise to interlock the withdrawable part. Remove double-bit key. Close control gate. Close lock (optional). r The withdrawable circuit-breaker has been racked from test position to service position; the position indicator is in CLOSED position (vertical bar) BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 39

40 13.5 Racking the withdrawable circuit-breaker to test position ATTENTION! Please observe: The instructions in this section also apply to the disconnector link and the withdrawable metering unit. ATTENTION! Withdrawable disconnector links cannot switch electrical power on or off. Rack withdrawable disconnector links from test position to service position only if the panel is in de-energized condition. This equally applies to racking from service position to test position. Preconditions for operation High-voltage door closed Withdrawable part in service position Circuit-breaker in OPEN position Racking crank for moving the withdrawable circuit-breaker available Double-bit key available Fig. 31: Actuating opening for racking the withdrawable circuit-breaker 40 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

41 ATTENTION! If there is no auxiliary voltage, both the electrical and the mechanical interlocks are closed. If the optional interlocks are overridden locally, manual switching operations are possible despite an existing electrical interlock, and this can cause failures. Ensure that the intended manual switching operation has been released externally. ATTENTION! All interlocks are only released when the withdrawable part is in a stable end position. Rack the withdrawable circuit-breaker, disconnector link and metering unit absolutely until end position. Open lock (optional). Push control gate upwards BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 41

42 To release access to the withdrawable part, insert the double-bit key and turn 90 counter-clockwise. Push the racking crank for moving the withdrawable circuit-breaker onto the operating shaft, and turn counter-clockwise as far as it will go. Remove racking crank for moving the withdrawable part. 42 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

43 Turn the double-bit key 90 counter-clockwise to interlock the withdrawable part. Remove double-bit key. Close control gate. Close lock (optional). r The withdrawable circuit-breaker has been racked from service position to test position; the position indicator of the withdrawable part is OPEN (horizontal bar) BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 43

44 13.6 Racking the withdrawable contactor to service position Preconditions for operation Withdrawable contactor inserted and locked in the panel High-voltage door closed Contactor in OPEN position Feeder earthing switch in OPEN position Racking crank for moving the withdrawable contactor available Double-bit key available The actuating opening for racking the withdrawable contactor is located on the control board of the high-voltage door. Fig. 32: Actuating opening for racking the withdrawable contactor ATTENTION! If there is no auxiliary voltage, both the electrical and the mechanical interlocks are closed. If optional interlocks are overridden locally, it is possible to perform manual operations despite existing interlocks, and this can cause failures. Ensure that the intended manual switching operation has been released externally. Procedure ATTENTION! All interlocks are only released when the withdrawable contactor is in a stable end position. Always rack the withdrawable contactor completely up to the end position. 44 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

45 Open lock (optional). Push control gate upwards. ATTENTION! If the contactor on the withdrawable part is equipped with a mechanical closing latch, the contactor will automatically be switched to OPEN position as soon as the double-bit key is inserted and turned 90 clockwise. Automatic opening only happens when the contactor on the withdrawable part is in CLOSED position. To release access to the withdrawable part, insert the double-bit key and turn 90 clockwise BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 45

46 Push the racking crank for moving the withdrawable contactor onto the operating shaft, and turn clockwise as far as it will go. Remove racking crank for moving the withdrawable part. Turn the double-bit key 90 clockwise to interlock the withdrawable part. Remove double-bit key. Close control gate. Close lock (optional). r The withdrawable contactor has been racked from test position to service position. 46 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

47 13.7 Racking the withdrawable contactor to test position Preconditions for operation Withdrawable contactor inserted and locked in the panel High-voltage door closed Withdrawable part in service position Contactor in OPEN position Racking crank for moving the withdrawable contactor available Double-bit key available Fig. 33: Actuating opening for racking the withdrawable contactor ATTENTION! If there is no auxiliary voltage, both the electrical and the mechanical interlocks are closed. If optional interlocks are overridden locally, it is possible to perform manual operations despite existing interlocks, and this can cause failures. Ensure that the intended manual switching operation has been released externally. ATTENTION! All interlocks are only released when the withdrawable contactor is in a stable end position. Always rack the withdrawable contactor completely up to the end position BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 47

48 Open lock (optional). Push control gate upwards. ATTENTION! If the contactor on the withdrawable part is equipped with a mechanical closing latch, the contactor will automatically be switched to OPEN position as soon as the double-bit key is inserted and turned 90 clockwise. Automatic opening only happens when the contactor on the withdrawable part is in CLOSED position. To release access to the withdrawable part, insert the double-bit key and turn 90 counter-clockwise. Push the racking crank for moving the withdrawable part onto the operating shaft, and turn counter-clockwise as far as it will go. 48 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

49 Remove racking crank for moving the withdrawable part. Turn the double-bit key 90 counter-clockwise to interlock the withdrawable part. Remove double-bit key. Close control gate. Close lock (optional). r The withdrawable part has been racked from service position to test position. Preconditions for operation 13.8 Closing the circuit-breaker Manual operation Withdrawable part in service or test position Spring charged Push rod available Fig. 34: Actuating opening for closing the circuit-breaker mechanically BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 49

50 Procedure Turn cover of actuating opening aside using the rotary button located over it. Insert the push rod through the actuating opening in the door and operate the ON pushbutton until the switching noise of the circuit-breaker can be heard. r The position indicator changes from "0" position to "I" position. The operations counter is increased by 1. The circuit-breaker is closed. Take push rod out of actuating opening. Cover of actuating opening closes automatically. 50 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

51 Preconditions for operation Electrical operation Withdrawable part in service or test position Spring charged High-voltage door of panel is closed. Central or local electrical control. Procedure DANGER! If there is no auxiliary voltage, both the electrical and the mechanical interlocks are closed. If the interlocks are overridden, manual switching operations are possible despite an existing electrical interlock, and this can cause failures. Ensure that the intended manual switching operation has been released externally. Close circuit-breaker via central or local electrical control. r The position indicator changes from "0" position to "I" position. The operations counter is increased by 1. The circuit-breaker is closed Opening the circuit-breaker Preconditions for operation Manual operation Withdrawable part in service or test position Circuit-breaker in CLOSED position Push rod available Fig. 35: Opening the circuit-breaker mechanically BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 51

52 DANGER! If there is no auxiliary voltage, both the electrical and the mechanical interlocks are closed. If the optional interlocks are overridden, manual switching operations are possible despite an existing interlock, and this can cause failures. Ensure that the intended manual switching operation has been released externally. Procedure Turn cover of actuating opening aside using the rotary button located over it. Insert the push rod through the actuating opening in the door and operate the OFF pushbutton until the switching noise of the circuit-breaker can be heard. r The position indicator changes from position "I" to position "O". The circuit-breaker is open. Take push rod out of actuating opening. Cover of actuating opening closes automatically. 52 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

53 Preconditions for operation Procedure Electrical operation Circuit-breaker in CLOSED position Central or local control. Open circuit-breaker via central or local electrical control. r The circuit-breaker position indicator changes from "I" position to "0" position. The circuit-breaker is open Charging the spring manually Spring energy store indicator When auxiliary voltage is applied, the spring energy store of the circuit-breaker is charged automatically by plugging the low-voltage connector. The spring energy store indicator changes from "spring energy store not charged" to "spring energy store charged". Fig. 36: Spring energy store indicator "Spring energy store not charged" Fig. 37: Spring energy store indicator "Spring energy store charged" If the control voltage fails, the closing spring for operating the circuit-breaker is no longer charged automatically by the motor. To operate the circuit-breaker in spite of this, the closing spring must be charged manually. The closing springs of the circuit-breaker can be charged manually both with the circuitbreaker in test position and with the circuit-breaker in service position. Preconditions Withdrawable circuit-breaker completely inserted and locked in the panel Hand crank available Fig. 38: Actuating opening for charging the closing spring manually BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 53

54 DANGER! Risk of injury by sudden rotation of hand crank. If you use a hand crank without a freewheel to charge the spring, the hand crank will rotate when the control voltage is switched on again (motor starts up) and can lead to injury. Use special hand crank with freewheel from the accessories! Turn control gate of operating shaft aside using the rotary button located over it. Push hand crank onto operating shaft. Hold the freewheel a and turn the hand crank s clockwise approx. 25 turns until the "spring energy store charged" indication appears in the inspection window. r The spring is latched automatically. The energy required for the operating sequence OPEN-CLOSE-OPEN (auto-reclosing) is stored in the spring. The spring energy store indicator changes from "spring energy store not charged" to "spring energy store charged". Remove the hand crank. Close control gate of operating shaft using the rotary button. 54 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

55 13.11 Closing or opening the contactor Electrical operation The contactor in the contactor panel can be closed or opened by electrical operation. The control elements for electrical operation are located on the front door of the low-voltage compartment. Alternatively, electrical operation can also be done from a control board or a separate switching room. Mechanical operation Besides electrical opening, a contactor can also be switched off through a mechanical opening operation. To do this, the contactor must be equipped with a mechanical closing latch. Mechanical opening can take place with the withdrawable contactor both in test and service position see Page 44, "Racking the withdrawable contactor to service position" see Page 47, "Racking the withdrawable contactor to test position" Instruction label If contactors on withdrawable parts are designed without mechanical closing latch, these contactors are identified with an instruction label on the front cover of the withdrawable part. a Instruction label Fig. 39: Instruction label on withdrawable contactor BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 55

56 13.12 Feeder earthing NOTE! Please observe: The instructions in this section also apply to disconnecting panels with feeder earthing switch. Preconditions for operation The feeder to be earthed is isolated Withdrawable part in test position Operating lever available DANGER! Once you have started a switching operation, you must complete it totally; turning back is blocked. The operating lever cannot be removed at intermediate positions. Do not remove the operating lever at intermediate positions. In circuit-breaker, disconnecting and metering panels, the actuating opening and the position indicator of the feeder earthing switch are located bottom-left on the door to the switching device compartment; in contactor panels, bottom-right. The actuating opening is locked by means of an additional control gate. Fig. 40: Actuating opening at the circuitbreaker and disconnecting panel Fig. 41: Actuating opening at the contactor panel 56 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

57 DANGER! If there is no auxiliary voltage, both the electrical and the mechanical interlocks are closed. If the necessary interlocks are overridden, manual switching operations are possible despite an existing interlock, and this can cause failures. Observe the Five Safety Rules (see Page 4, "General instructions"). Ensure that the intended manual switching operation has been released externally. Procedure ATTENTION! If the operating lever is not inserted correctly, the earthing switch may be damaged. Insert the operating lever in the actuating opening as far as it will go. Open lock (optional). Pull control gate upwards to release the actuating opening. Fig. 42: Control gate at the circuit-breaker and disconnecting panel Fig. 43: Control gate at the contactor panel BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 57

58 Insert operating lever for feeder earthing switch into actuating opening. Fig. 44: Operating lever at the circuitbreaker and disconnecting panel Fig. 45: Operating lever at the contactor panel Turn operating lever 180 clockwise. r The position indicator changes to CLOSED position. The earthing switch is closed. Remove operating lever. Close control gate. Close lock (optional). 58 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

59 13.13 Feeder de-earthing NOTE! Please observe: The instructions in this section also apply to disconnecting panels with feeder earthing switch. Preconditions for operation Authorization to deactivate the feeder earthing is available DANGER! Once you have started a switching operation, you must complete it totally; turning back is blocked. The operating lever cannot be removed at intermediate positions. Do not remove the operating lever at intermediate positions In basic panels., the actuating opening and the position indicator of the feeder earthing switch are located bottom-left on the door to the switching device compartment; in contactor panels, bottom-right. The actuating opening is locked by means of an additional control gate. Fig. 46: Actuating opening at the circuitbreaker and disconnecting panel Fig. 47: Actuating opening at the contactor panel DANGER! If there is no auxiliary voltage, both the electrical and the mechanical interlocks are closed. If the necessary interlocks are overridden, manual switching operations are possible despite an existing interlock, and this can cause failures. Observe the Five Safety Rules (see Page 4, "General instructions"). Ensure that the intended manual switching operation has been released externally BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 59

60 Procedure ATTENTION! If the operating lever is not inserted correctly, the earthing switch may be damaged. Insert the operating lever in the actuating opening as far as it will go. Open lock (optional). Pull control gate upwards to release the actuating opening. Fig. 48: Control gate at the circuit-breaker and disconnecting panel Fig. 49: Control gate at the contactor panel Insert operating lever for feeder earthing switch into actuating opening. Fig. 50: Operating lever at the circuitbreaker and disconnecting panel Fig. 51: Operating lever at the contactor panel Turn operating lever 180 counter-clockwise. r The position indicator changes to OPEN position. The earthing switch is open. 60 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

61 Remove operating lever. Close control gate. Close lock (optional) Busbar earthing ATTENTION! Once you have started a switching operation, you must complete it totally; turning back is blocked. The operating lever cannot be removed at intermediate positions. Do not remove the operating lever at an intermediate position. Arrangement of control elements The operating mechanism of the earthing switch provided for earthing the busbar system is located in the front upper area of the low-voltage compartment Fig. 52: Control elements of earthing switch for busbar system BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 61

62 Preconditions Manual operation The earthing switch can only be closed if the electromagnetic interlock of the operating mechanism is eliminated or if opening the padlock at the operating mechanism is authorized. Operating lever available DANGER! Manual operations might be possible in spite of an existing electrical interlock, and this can cause failures. Observe the Five Safety Rules (see Page 4, "General instructions"). Ensure that the intended manual switching operation has been released externally. Procedure Fig. 53: Earthing switch in OPEN position and secured with lock Open lock or deactivate electromagnetic interlock. Open control gate. Insert operating lever and turn approx. 115 clockwise. 62 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

63 While turning the operating lever, the position indicator of the earthing switch changes from the OPEN position to the FAULTY position. Fig. 54: Position indicator in FAULTY position After turning the operating lever to the end position, the position indicator of the earthing switch changes from the FAULTY position to the CLOSED position. Fig. 55: Operating lever in end position Remove operating lever. Close control gate. Close lock (optional). r The busbar earthing switch was switched from the OPEN to the CLOSED position, thus earthing the busbar. The position indicator of the earthing switch changes from the OPEN position via the FAULTY position to the CLOSED position. Fig. 56: Position indicator in CLOSED position BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 63

64 13.15 Busbar de-earthing ATTENTION! Once you have started a switching operation, you must complete it totally; turning back is blocked. The operating lever cannot be removed at intermediate positions. Do not remove the operating lever at an intermediate position. Arrangement of control elements The operating mechanism of the earthing switch provided for earthing the busbar system is located in the front upper area of the low-voltage compartment Fig. 57: Control elements of earthing switch for busbar system Preconditions Manual operation Operating lever available The earthing switch can only be opened if the electromagnetic interlock of the operating mechanism is eliminated or if opening the padlock at the operating mechanism is authorized. DANGER! Manual operations might be possible in spite of an existing electrical interlock, and this can cause failures. Observe the Five Safety Rules (see Page 4, "General instructions"). Ensure that the intended manual switching operation has been released externally. 64 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

65 Procedure Fig. 58: Earthing switch in CLOSED position and secured with lock Open lock or deactivate electromagnetic interlock. Open control gate. Insert operating lever and turn approx. 115 counter-clockwise. While turning the operating lever, the position indicator of the earthing switch changes from the CLOSED position to the FAULTY position. Fig. 59: Position indicator in FAULTY position BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 65

66 After turning the operating lever to the end position, the position indicator of the earthing switch changes from the FAULTY position to the OPEN position. Fig. 60: Operating lever in end position Remove operating lever. Close control gate. Close lock (optional). r The busbar earthing switch was switched from the CLOSED to the OPEN position, thus de-earthing the busbar. The position indicator of the earthing switch changes from the CLOSED position via the FAULTY position to the OPEN position. Fig. 61: Position indicator in OPEN position 66 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

67 13.16 Access to connection compartment Access through switching device compartment DANGER! To perform any kind of checks or work in the connection compartment of a panel, you must ensure that this compartment is safely isolated from supply. Otherwise the cables in the connection compartment will be live at operating voltage. Before removing the partition in the switching device compartment, isolate and earth the cable connection in the connection compartment. Before removing a rear wall on the rear side of a panel, isolate and earth the cable connection in the connection compartment. Observe the Five Safety Rules (see Page 4, "General instructions"). Verify safe isolation from supply (see Page 88, "Verification of safe isolation from supply"). Procedure Ask for permission to earth, and switch the feeder earthing switch to EARTHED (see Page 56, "Feeder earthing"). Open the high-voltage door (see Page 32, "Opening high-voltage door of circuitbreaker panel") Take the withdrawable part out (see Page 71, "Taking the withdrawable circuitbreaker, disconnector link and/or withdrawable metering unit out of the panel"). Check whether the position indicator of the feeder earthing switch in the switching device compartment shows "I", i.e. earthed. Remove the partition between the switching device compartment and the connection compartment. In circuit-breaker, disconnecting or metering panels: Remove bolts from protection plate of switching device compartment. Fig. 62: Bolted joints of protection plate of switching device compartment in circuit-breaker, disconnecting and metering panels Remove protection plate of switching device compartment a BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 67

68 Remove bolts from partition to connection compartment inside switching device compartment. Fig. 63: Bolted joints of partition in circuit-breaker panel Fig. 64: Bolted joints of partition in contactor panel Remove partition s. 68 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

69 Access through rear side of panel Remove 38 bolts M8 x 20 from rear wall to connection compartment. Remove rear wall to connection compartment. Check whether the earthing switch blades are in EARTHED position. Fig. 65: Circuit-breaker panel: Earthing switch open a s Indication: Earthing switch open Earthing switch blades in vertical position BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 69

70 Fig. 66: Circuit-breaker panel: Earthing switch closed (earthed) d f Indication: Earthing switch closed Earthing switch blades in horizontal position Fig. 67: Contactor panel: Earthing switch open Fig. 68: Contactor panel: Earthing switch closed (earthed) with removed partition a d f Indication: Earthing switch open Indication: Earthing switch closed Earthing switch blades in horizontal position Now you can perform the intended work in the connection compartment. 70 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

71 13.17 Taking the withdrawable circuit-breaker, disconnector link and/or withdrawable metering unit out of the panel Preconditions Service truck available Racking the withdrawable part to test position High-voltage door open. Procedure Detach the low-voltage connector. To do this, push the coupling lever upwards. Hang the low-voltage plug into the support located underneath the low-voltage compartment. ATTENTION! If the service truck is not correctly interlocked with the panel while removing the withdrawable part, the switchgear and the withdrawable part can be seriously damaged. Move the withdrawable part only if the service truck is interlocked with the panel. Move the service truck only if the withdrawable part is interlocked in its end position on the service truck BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 71

72 Move the service truck centrally in front of the panel. Observe that the centering brackets are positioned inside the door opening. Push the locking edges on the left and right side of the truck into the openings provided for this purpose in the panel frame. Observe that the guide rails of the panel and the service truck are horizontally aligned with each other. If required, adjust the height of the guide rails at the service truck with two open-end spanners SW 19 at the two lower setting screws. 72 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

73 Verify the position of the unlocking levers a (denoted) and d, and check whether the service truck is correctly interlocked with the panel by pulling s the service truck backwards. r The service truck is interlocked with the panel. Pulling the withdrawable part onto the service truck Release the interlocking between the withdrawable part and the panel by turning the two locking levers at the withdrawable part to the outside, and pull the withdrawable part onto the service truck by the handles until it reaches the end position BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 73

74 Turn the two locking levers at the withdrawable part to the inside in order to interlock the withdrawable part with the service truck. Pull the two unlocking levers on the left and right side of the service truck upwards to release the interlocking with the panel frame. r Now, the withdrawable circuit-breaker can be transported on the service truck. 74 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

75 Fig. 69: Withdrawable part on service truck Inserting the withdrawable circuit-breaker and/or disconnector link in a panel Coding The mechanical coding on the low-voltage plug connector of the withdrawable part prevents plugging the low-voltage connector on withdrawable parts with lower current ratings in panels with higher current ratings. The withdrawable circuit-breakers and disconnector links are differently coded. DANGER! Operating the switchgear with a withdrawable part that is not suitable for the corresponding panel can cause serious damage to the switchgear. The coding must not be changed. NOTE! Withdrawable contactors are designed without coding Do absolutely observe the rated currents of the HV HRC fuse-links BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 75

76 a Mechanical coding Fig. 70: Low-voltage plug connection a Coding symbol on the operating mechanism box of the circuit-breaker s Coding symbol on the low-voltage connector Fig. 71: Low-voltage connector On the rear side of the low-voltage plug connector and on the top side of the operating mechanism box of the circuit-breaker, the disconnector link and the withdrawable metering unit, there is a coding symbol. If the symbols are identical, the withdrawable part concerned can be inserted in the panel. With the mechanical coding and the coding symbols, different functions and equipment versions are coded: Function Function of withdrawable part Equipment versions Equipment version only for withdrawable circuit-breaker Equipment version Withdrawable circuit-breaker and disconnector link in combination with rated normal current of the withdrawable part versions "circuit-breaker" and "disconnector link" for 1250 A and 2500 A Withdrawable part equipped without / with electromagnetic interlocking of the disconnecting function and/or earthing switch operating function Equipped with a number of shunt releases, and/or combination of shunt releases with undervoltage releases and c.t.-operated releases 76 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

77 Positioning the service truck with the withdrawable part in front of the panel ATTENTION! If the service truck is not correctly interlocked with the panel while inserting the withdrawable part, the switchgear and the withdrawable part can be seriously damaged. Move the withdrawable part only if the service truck is interlocked with the panel. Move the service truck only if the withdrawable part is interlocked in its end position on the service truck. Open the high-voltage door (see Page 32, "Opening high-voltage door of circuitbreaker panel") Verify correspondence between the position of the earthing switch operating shaft in the withdrawable part and the earthing switch coupling in the panel. Make sure that the coupling pin of the earthing switch operating shaft in the withdrawable part and the earthing switch coupling in the switching device compartment are in vertical position. Fig. 72: Coupling pin in the earthing switch operating shaft Fig. 73: Earthing switch coupling in the switching device compartment BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 77

78 Move the service truck centrally in front of the panel. Observe that the centering brackets are positioned inside the door opening. Push the locking edges on the left and right side of the truck into the openings provided for this purpose in the panel frame. Observe that the guide rails of the panel and the service truck are horizontally aligned with each other. If required, adjust the height of the guide rails at the service truck with two open-end spanners SW 19 at the two lower setting screws. 78 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

79 Verify the position of the unlocking lever, and check whether the service truck is correctly interlocked with the panel by pulling the service truck backwards. r The service truck is interlocked with the panel. Pushing the withdrawable part into the panel Turn the locking levers at the operating traverse of the withdrawable part to the outside. Pull the unlocking handle of the service truck out BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 79

80 Push the withdrawable part into the panel as far as it will go. Interlock the withdrawable part with the panel by turning the two locking levers at the operating traverse of the withdrawable part inside. The withdrawable part is correctly interlocked with the panel when both locking levers latch tight inside. Pull the two unlocking levers on the left and right side of the service truck upwards to release the interlocking with the panel frame. Pull the service truck back away from the panel at the black fabric edge. Mount the low-voltage connector carefully and push the coupling lever downwards. r Now, the withdrawable part is inserted in the panel. 80 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

81 13.19 Taking the withdrawable contactor out of the panel Preconditions Service truck available Withdrawable contactor in test position High-voltage door open ATTENTION! If the service truck is not properly interlocked with the panel while removing the withdrawable part, the switchgear and the withdrawable part can be seriously damaged. Move the withdrawable part only if the service truck is interlocked with the panel. Move the service truck only if the withdrawable part is interlocked in its end position on the service truck. NOTE! Withdrawable contactors are designed without coding Do absolutely observe the rated currents of the HV HRC fuse-links. Procedure Move the service truck centrally in front of the contactor panel. Bring the centering bolts a of the service truck into line with the centering openings s at the panel base. a s d f Centering bolt Centering opening Locking bracket Locking plate BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 81

82 Fold the locking bracket d upwards. This will lower the locking plate f. r The service truck is interlocked with the contactor panel. Pulling the withdrawable contactor onto the service truck Fig. 74: Preparing the withdrawable contactor for removal a s d f Withdrawable contactor Locking lever Service truck Locking bracket Open the two locking levers s at the withdrawable contactor. 82 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

83 Pull the withdrawable contactor a out of the switching device compartment and onto the service truck d until the withdrawable contactor latches tight on the service truck. The low-voltage connection is separated automatically. r Now the locking bracket f can be lowered, and the service truck with the withdrawable contactor can be removed Inserting the withdrawable contactor in the panel Before inserting the withdrawable contactor NOTE! When the withdrawable contactor is inserted, the mechanism for manual operation of the feeder shutter and the busbar shutter is not accessible. Insert the withdrawable contactor in the panel only if the feeder shutter and the busbar shutter are closed and secured with a padlock each. If required, close the feeder shutter and secure it with a padlock (see Page 99, "Closing the feeder shutter (lower shutter)"). If required, close the busbar shutter and secure it with a padlock (see Page 100, "Closing the busbar shutter (upper shutter)") BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 83

84 a s d f Padlock Padlock Feeder shutter, closed Busbar shutter, closed Fig. 75: Feeder and busbar shutters closed and locked Inserting the withdrawable contactor in the panel Before inserting the withdrawable contactor, check the position of the earthing switch coupling. The coupling must be in position s, then the receptacle a for the coupling pin of the earthing switch operating shaft d is in vertical position. a s Receptacle for coupling pin Marking in "O" position Fig. 76: Earthing switch coupling in the switching device compartment 84 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

85 Make sure that the coupling pin of the earthing switch operating shaft d in the withdrawable part is in vertical position. d f Coupling pin Low-voltage connection Fig. 77: Coupling pin of the earthing switch operating shaft The low-voltage connection f couples automatically when the withdrawable contactor is inserted. Positioning the service truck with the withdrawable part in front of the panel ATTENTION! If the service truck is not properly interlocked with the panel while inserting the withdrawable part, the switchgear and the withdrawable part can be seriously damaged. Move the withdrawable part only if the service truck is interlocked with the contactor panel. Move the service truck only if the withdrawable part is interlocked in its end position on the service truck. Open the high-voltage door (see Page 32, "Opening high-voltage door of circuitbreaker panel"). Move the service truck with the withdrawable contactor centrally in front of the contactor panel. Bring the centering bolts of the service truck into line with the centering openings at the panel base. Fold the locking bracket at the service truck upwards. The service truck is interlocked with the contactor panel. Release the withdrawable contactor from the service truck using the pedal, and push it completely into the contactor panel BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 85

86 Fig. 78: Pedal at the service truck Fig. 79: Pushing the withdrawable contactor into the panel Fold the locking bracket at the service truck downwards. The service truck can be removed. Close the two locking levers at the withdrawable contactor. Fig. 80: Closing the locking levers 86 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

87 Fig. 81: Locking lever closed r The withdrawable contactor is interlocked with the contactor panel. Close the high-voltage door (see Page 34, "Closing the high-voltage door of the circuit-breaker panel") Emergency operation of the feeder earthing switch without the withdrawable circuitbreaker inserted in the panel Preconditions for operation Feeder earthing (emergency operation without interlocking) Tool adapter for emergency operation ATTENTION! Manual emergency operations without withdrawable part are possible despite an existing electrical interlock, and this can cause failures. Observe the Five Safety Rules (see Page 4, "General instructions"). Ensure that the intended manual emergency operation without withdrawable part has been released externally. Procedure Open high-voltage door. Push tool adapter on coupling of operating mechanism in switching device compartment. Turn tool adapter clockwise. r The feeder earthing switch can be clearly heard to close. The position indicator changes from "0" position to "I" position BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 87

88 Preconditions for operation Feeder de-earthing Tool adapter for emergency operation ATTENTION! Manual emergency operations without withdrawable part are possible despite an existing electrical interlock, and this can cause failures. Observe the Five Safety Rules (see Page 4, "General instructions"). Ensure that the intended manual emergency operation without withdrawable part has been released externally. Procedure Open high-voltage door. Push tool adapter on coupling of operating mechanism in switching device compartment. Turn tool adapter counter-clockwise. r r r The feeder earthing switch can be clearly heard to open. The position indicator changes from position "I" to position "O". Ensure that the coupling in the panel and the shaft from the withdrawable unit are in the same position, before inserting the wiithdrawable unit Verification of safe isolation from supply To perform any kind of checks or work in the busbar compartment or the connection compartment of a panel, you must ensure that these compartments are safely isolated from supply. As voltage indicators, two device systems are used. CAPDIS device system installed directly in the low-voltage door, and LRM device system as an indicator with the associated measuring system installed below the low-voltage door. Fig. 82: Voltage indicator LRM Fig. 83: Voltage indicator CAPDIS 88 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

89 To check the perfect operation of the indicator, it is advisable to test it first in live condition. With the voltage indicators of the LRM system, repeat tests must be performed in accordance with IEC The year of the last repeat test is noted on the panel front, next to test socket L3. Fig. 84: Function test unit for voltage indicator Procedure ATTENTION! The function of the surge arrester installed is impaired if short-circuiting jumpers are used. Use voltage indicators according to IEC only. Insert the voltage indicator successively in all three feeder test sockets of the phases L1, L2, L3 (on the left side of the panel). If the indicator does not flash or light up in any of the three test sockets, the feeder is not live BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 89

90 Insert the voltage indicator successively in all three busbar test sockets of the phases L1, L2, L3 (on the right side of the panel). If the indicator does not flash or light up in any of the three test sockets, the busbars are not live. In panels with degree of protection IP51 for the metal enclosure, the test sockets are protected with covers. Refit the covers after having verified safe isolation from supply. Features of CAPDIS-S1+/-S2+ Maintenance-free Integrated repeat test of the interfaces (full lightning flash) Without auxiliary power Option: CAPDIS S2+ with remote indication of voltage state (auxiliary power required) With test sockets (LRM system) for phase comparison behind the cover Fig. 85: CAPDIS-S2+: Cover closed Fig. 86: CAPDIS-S2+: Cover open a LC display g Test socket L2 s "Display Test" button h Test socket L3 d Cover j Earth socket f Test socket L1 k Short instructions 90 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

91 Indications CAPDIS -S1+/-S2+ CAPDIS-S1+ CAPDIS-S2+ L1 L2 L3 L1 L2 L3 Operating voltage not present (CAPDIS- S2+) Operating voltage present - Operating voltage not present - Auxiliary power not present (CAPDIS- S2+) Earth fault or failure in phase L1, operating voltage at L2 and L3 Voltage (not operating voltage) present Indication: "Device function test" passed Indication: "ERROR" e.g. in case of missing auxiliary voltage (CAPDIS-S2+) Connecting earthing and short-circuit facility DANGER! High voltage! Danger! If the busbars in the busbar compartment and the cable or bar connections in the connection compartment have not been isolated, the contacts are live at operating voltage. Isolate the busbars in the busbar compartment and the cable or bar connections in the connection compartment before opening the shutters. Observe the Five Safety Rules (see Page 4, "General instructions"). Verify safe isolation from supply. To reach the fixed mating contacts, open the corresponding shutter (see Page 92, "Manual operation of shutters in circuit-breaker and disconnecting panels") BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 91

92 Preconditions Earthing accessories available a s d f g Busbar bushings Fixed mating contacts Feeder bushings Earthing accessories Earthing clamp on earthing busbar. Fig. 87: Earthing accessories, mounted Feeder bushings Fix earthing clamp of earthing accessories f on earthing busbar g. Plug connectors of earthing accessories f on fixed mating contacts s of feeder bushings d (lower bushing row) and screw tight. r Feeder connected to earthing busbar. Busbar bushings Fix earthing clamp of earthing accessories f on earthing busbar g. Plug connectors of earthing accessories f on fixed mating contacts s of busbar bushings a (upper bushing row) and screw tight. r Busbars connected to earthing busbar Manual operation of shutters in circuit-breaker and disconnecting panels The feeder and busbar shutters can be opened individually. When one shutter is opened, the mechanism of the other one can be padlocked. If both shutters have to be opened at the same time, locking the shutter mechanism is omitted during the following operations. 92 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

93 DANGER! High voltage! Danger! If the busbars in the busbar compartment and the cable or bar connections in the connection compartment have not been isolated, the contacts are live at operating voltage. Isolate the busbars in the busbar compartment and the cable or bar connections in the connection compartment before opening the shutters. Observe the Five Safety Rules (see Page 4, "General instructions"). Verify safe isolation from supply. Opening the feeder shutter (lower shutter) Rack withdrawable circuit-breaker to test position. Take circuit-breaker out of panel (see Page 71, "Taking the withdrawable circuitbreaker, disconnector link and/or withdrawable metering unit out of the panel"). Padlock busbar shutter mechanism on left side of panel. Push slip-on lever on feeder shutter mechanism on right side of panel BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 93

94 Operate the slip-on lever outside the panel to open the shutters: Push the handle down. The slip-on lever latches tight and the feeder shutter opens automatically. Perform voltage test or other intended operation. Closing the feeder shutter Push handle of slip-on lever lightly to the left (to release the latch) and let it slip upwards. The shutter closes automatically. Remove slip-on lever for shutters. Remove padlock from busbar shutter mechanism on left side of panel. Insert circuit-breaker in panel (see Page 75, "Inserting the withdrawable circuitbreaker and/or disconnector link in a panel"). Close high-voltage door. Opening the busbar shutter (upper shutter) Rack withdrawable circuit-breaker to test position. Take circuit-breaker out of panel (see Page 71, "Taking the withdrawable circuitbreaker, disconnector link and/or withdrawable metering unit out of the panel"). 94 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

95 Padlock feeder shutter mechanism on right side of panel. Push slip-on lever on busbar shutter mechanism on left side of panel. Operate the slip-on lever outside the panel to open the shutters: Push the handle down. The slip-on lever latches tight and the busbar shutter opens automatically. Perform voltage test or other intended operation BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 95

96 Closing the busbar shutter Push handle of slip-on lever lightly to the right (to release the latch) and let it slip upwards. The shutter closes automatically. Remove slip-on lever for shutters. Remove padlock from feeder shutter mechanism on right side of panel. Insert circuit-breaker in panel (see Page 75, "Inserting the withdrawable circuitbreaker and/or disconnector link in a panel"). Close the high-voltage door Manual operation of shutters in the contactor panel The feeder and busbar shutters can be opened individually. When one shutter is opened, the mechanism of the other one can be padlocked. If both shutters have to be opened at the same time, locking the shutter mechanism is omitted during the following operations. DANGER! High voltage! Danger! If the busbars in the busbar compartment and the cable or bar connections in the connection compartment have not been isolated, the contacts are live at operating voltage. Isolate the busbars in the busbar compartment and the cable or bar connections in the connection compartment before opening the shutters. Observe the Five Safety Rules (see Page 4, "General instructions"). Verify safe isolation from supply. 96 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

97 Preparing shutter operation Rack the withdrawable contactor to test position. Open the high-voltage door. Take the withdrawable contactor out of the panel (see Page 81, "Taking the withdrawable contactor out of the panel"). a s d Shutter mechanism for manual operation Busbar shutter Feeder shutter Fig. 88: Front view of contactor panel, high-voltage door open and withdrawable contactor removed The shutter mechanism for manual operation of the shutters is located top-left in the switching device compartment of the contactor panel BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 97

98 Description of the shutter mechanism for manual operation a s d f to h, k j Padlock Padlock Shutter operating lever with handle for operation of the busbar shutter Locking buttons Shutter operating lever with handle for operation of the feeder shutter Busbar shutter, closed l ; Feeder shutter, closed Fig. 89: Control elements of the shutter mechanism 98 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

99 Opening the feeder shutter (lower shutter) Loosen the locking buttons h and k. Open and remove the padlock a. Turn the shutter operating lever j clockwise by the handle as far as it will go. Tighten the locking buttons h and k. Fig. 90: Feeder shutter open r The feeder shutter ; is open. Perform voltage test or other intended operation. Closing the feeder shutter (lower shutter) Loosen the locking buttons h and k. Turn the shutter operating lever j counter-clockwise by the handle as far as it will go. Tighten the locking buttons h and k. Refit the padlock a and lock it. r The feeder shutter ; is closed. Close the high-voltage door BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 99

100 Opening the busbar shutter (upper shutter) Loosen the locking buttons f and g. Open and remove the padlock s. Turn the shutter operating lever d counter-clockwise by the handle as far as it will go. Tighten the locking buttons f and g. Fig. 91: Busbar shutter open r The busbar shutter l is open. Perform voltage test or other intended operation. Closing the busbar shutter (upper shutter) Loosen the locking buttons f and g. Turn the shutter operating lever d clockwise by the handle as far as it will go. Tighten the locking buttons f and g. Refit the padlock s and lock it. r The busbar shutter l is closed. Close the high-voltage door. 100 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

101 13.26 Application of HV HRC fuse-links Replacing HV HRC fuse-links Preconditions The dimensions of the HV HRC fuse-links must conform to DIN To replace the HV HRC fuse-links, the withdrawable contactor must be taken out of the panel (see Page 81, "Taking the withdrawable contactor out of the panel") DANGER! High voltage! Danger! Before performing any kind of work or test in a connection compartment with tripped fuse, isolate the feeder. Open the vacuum contactor. Rack the withdrawable part to test position. Earth the feeder. Observe the Five Safety Rules. DANGER! Danger of burning on hot fuse-links. Use the personal protective equipment. Let hot fuse-links cool down before replacing. ATTENTION! Even if the withdrawable part shows no visible damages of a fault, the fuse may have tripped due to a fault. Check the switching device compartment for deformations when a fuse has tripped. NOTE! Tripped fuses can cause hidden damages on the other fuses. Always replace all fuse-links, even if only one fuse has tripped BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision

102 Permissible HV HRC fuse-links Use only fuse-links from the table below. Table of permissible HV HRC fuse-links: Back-up fuses for motor protection make SIBA, type HHM for rated currents I n with: 40 A I n 315 A Back-up fuses for standard protection make Firma SIBA, type HHD for rated currents I n with: 6.3 A I n <50A U r [kv] I n HV HRC fuse [A] Reference dimension "e" [mm] HV HRC fuse-link Order no. Type ,3 HHD HHD HHD HHD HHD ,5 HHD HHD HHM HHM HHM HHM HHM HHM HHM HHM HHM U r [kv] I n HV HRC fuse [A] Reference dimension "e" [mm] HV HRC fuse-link Order no. Type 12 6, ,3 HHD HHD HHD HHD HHD 31, ,5 HHD HHD HHM HHM HHM HHM HHM HHM Necessary extension tubes for HV HRC fuse-links with reference dimension "e" < 442 mm Order no.: SIBA HV HRC fuse-link with reference dimension "e" [mm] Design of fuse-links according to IEC with dimensions according to DIN Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

103 ATTENTION! Withdrawable contactors are exclusively designed for operation with HV HRC fuselinks. Operate withdrawable contactor with HV HRC fuse-links only. Do not mount bridging links instead of HV HRC fuse-links. Procedure Verify safe isolation from supply of the feeder. Open the fuse brackets over the HV HRC fuse-links with a suitable screwdriver. Fig. 92: Opening the fuse bracket with a screwdriver Fig. 93: Fuse clip open Pull the HV HRC fuse-link at the end without the striker upwards out of the fuse clips and remove all HV HRC fuse-links. Fig. 94: HV HRC fuse-link: End without striker Fig. 95: HV HRC fuse-link: End with striker a s Arrow to indicate the location of the striker Striker BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision

104 Insert the new HV HRC fuse-link. The striker s must point towards the operating front of the withdrawable part. The position of the striker is identified with an arrow on the fuse-link a. Fig. 96: Mounted HV HRC fuse-links r The HV HRC fuse-links have been replaced. NOTE! Electrical indication of tripped fuse-links Electrical indications at the panel or in the remote control room are automatically reset to operating mode by replacing the HV HRC fuse-links. 104 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

105 13.27 Normal current of the HV HRC fuse-links The current carrying capacity of the withdrawable contactor with HV HRC fuse-links performs according to the tables below: Current carrying capacity at a system frequency of 50 Hz U n I th f Number per phase I n HV HRC fuse Current carrying capacity in [A] at ambient temperature in [ C] [kv] [ka] [Hz] Order no. [A] <= U n I th f Number per phase I n HV HRC fuse Current carrying capacity in [A] at ambient temperature in [ C] [kv] [ka] [Hz] Order no. [A] <= 31, Current carrying capacity at a system frequency of 60 Hz U n I th f Number per phase I n HV HRC fuse Current carrying capacity in [A] at ambient temperature in [ C] [kv] [ka] [Hz] Order no. [A] <= BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision

106 U n I th f Number per phase I n HV HRC fuse Current carrying capacity in [A] at ambient temperature in [ C] [kv] [ka] [Hz] Order no. [A] <= 31, For rated fuse currents <= 63 A, no current reductions must be considered due to the ambient temperature and the system frequency Motor starting currents Due to the arising motor starting current, the instant when the motor starts represents the maximum stress for the HV HRC fuse-link. Motor starting currents are dependent on the starting time and the starting frequency. The latest motor protection tables with HV HRC fuse-links type HHM are available in the download area of the SIBA company: These motor protection tables show the correspondence between the maximum permissible starting currents of downstream HV motors (depending on the stating time and the starting frequency) and the associated HV HRC fuse-links. 106 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

107 13.29 Coordinating the components of the motor circuit The illustration below shows the coordination of a HV HRC fuse characteristic with a motor characteristic as an example: Fig. 97: Example for the coordination of a HV HRC fuse characteristic 125 A with a motor characteristic a s d f Characteristic of the HV HRC fuse Motor starting current Motor starting time Characteristic of the overcurrent-time protection The latest time-current characteristics for HV HRC fuse links type HHM are available in the download area of the SIBA company: Coordination Rules for coordinating the components of the motor circuit: The time-current characteristic must be located on the right of the motor starting current (point A). The rated current of the HV HRC fuse-link must exceed the normal current of the motor. The current corresponding to the intersection B of the HV HRC fuse-link characteristic and the characteristic of the overcurrent-time protection must be higher than the minimum breaking current of the HV HRC fuse-link. If this is not feasible, it must be ensured that overload currents that are smaller than the minimum breaking current of the HV HRC fuse-link are interrupted by the switching device via the striker. This prevents thermal overloading of the HV HRC fuselink, which would otherwise be destroyed. The selected HV HRC fuse-link limits the sustained symmetrical short-circuit currentrom I K to the let-through current I D, shown in the diagram for the currentlimiting characteristics (I D as a function of I K for HV HRC fuse-links with different rated currents). The maximum permissible let-through current is I D =46kA BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision

108 Requirements The coordination of the components of the motor circuit places the following requirements: The let-through current I D must not exceed 46 ka at 7.2 kv/12 kv. In case of low-voltage supply via a control transformer, short-circuit currents ranging above the limit breaking capacity must be interrupted within 80 ms. This requirement does not apply if - the mechanical latch is provided - or - the opening times have been extended so much, that in the a.m. current range the contactor can only open when the fuse has interrupted the current The limit breaking capacity is: - 3TL62: 5.0 ka - 3TL63: 5.0 ka - 3TL66: 4.5 ka Due to the arising motor starting current, the instant when the motor starts represents the maximum stress for the HV HRC fuse-link. This stress must neither operate nor pre-damage the fuse-link. Other factors of influence on the stress of the HV HRC fuse-links are the starting time and the starting frequency of the motors Key-operated interlocking with Ronis locks Key-operated interlocks with Ronis locks are available for circuit-breaker and disconnecting panels NXAIR. Interlocking functions With these key-opertaed interlocks, three interlocking functions are available. The key is only released from the Ronis lock if: the withdrawable part is racked to test position. This interlocks the possibility to rack the withdrawable part concerned to service position. the associated earthing switch is in OPEN position. This interlocks the possibility to switch the earthing switch to CLOSED position. the associated earthing switch is in CLOSED position. This interlocks the possibility to switch the earthing switch to OPEN position. Release The respective function is released again by re-inserting the key in the associated lock and releasing the lock. 108 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

109 Combinations These three interlocking functions are available either as individual interlock or as a combination of two or all three interlocking functions. NOTE! Key-operated interlocking with Ronis locks is additional to the mechanical interlocks. For information to mechanical interlocks, see Page 12, "Interlocks". NOTE! Combination of Ronis key-operated interlocks with electromagnetic interlocks is not feasible. For information to standard electromagnetic interlocks, see Page 12, "Interlocks". Cover Access to Ronis -locks is located on the right of the standard actuating and control openings on the high-voltage door, and protected with a cover. The cover is secured with a rotary button on the high-voltage door. a s Cover Rotary button to secure the cover Fig. 98: Front view of withdrawable panel with key-operated interlock, cover secured (panel width 800 mm and 1000 mm)t BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision

110 Actuation of the individual Ronis key-operated interlocks Turn rotary button counter-clockwise until it is possible to lift the cover a s d f g Cover, lifted Screw thread for rotary button Key release: Only when feeder earthing switch is in CLOSED position Key release: Only when feeder earthing switch is in OPEN position Key release: Only when withdrawable part is racked to test position Fig. 99: Cover lifted NOTE! The key-operated interlocking functions for the position of the withdrawable part and the position of the earthing switch in OPEN position or CLOSED position can be interlocked in combination. The interlocking functions for the position of the earthing switch in OPEN position or CLOSED position can not be interlocked in combination. Turn Ronis key counter-clockwise according to the required function and remove key. r The selected function is interlocked with a Ronis lock. 110 Revision 02 * OPERATING INSTRUCTIONS NXAIR * BX3300-0LA00-0AB1

111 Example The following illustration shows exemplary the interlocking of the function "Key is released when earthing switch is in CLOSED position" a s Ronis key removed Earthing switch in CLOSED position Fig. 100: Example of interlocking function Finally lower the cover and secure with the rotary button on the high-voltage door. Release To release the interlocked function, perform the described operations in reverse order BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision