Medium Voltage switchgear MCset 4-24 kv Withdrawable SF6 circuit breaker Instruction for use
Contents General 2 Glossary 2 Symbols 2 Recommendations 3 General description 4 AD4 unit 4 AD4 unit with toroidal CT 7 AD4 RHC-RHB 8 CL4-GL4 unit 9 TT4 unit 13 RD4 unit 15 DI4 unit 16 Withdrawable mobile part 17 Identification 18 Description of front panels 19 Circuit-breaker service trolley 20 List of accessories supplied 21 Access to the interior of the units 22 AD4 - RD4 22 CL4 23 GL4 25 TT4 26 DI4 27 AD4 RHC-RHB 28 Procedures to draw-out/draw-in 29 Procedure to draw-out the mobile part 29 Procedure to draw-in the mobile part 32 Procedure to extract the VTs and opening the MV cable compartment 35 Procedure to insert the VT s and closing the MV cable compartment 39 Installation of fuses in a DI4 unit 44 Testing arrangements 45 MV cable voltage indicators 45 Phasing out 45 MV cable testing 45 Operating instructions 48 Circuit-breaker plug-in procedure 48 Circuit-breaker withdrawal procedure 49 Earthing switch closing procedure 50 Earthing switch opening procedure 51 Procedure for plugging in withdrawable VT fuses 52 Procedure for drawing out withdrawable VT fuses 53 Padlocking 54 Keylocking 57 DI4 unit 58 Maintenance instructions 63 Premise 63 Resuming table 63 AD4 unit 64 DI4 unit 65 07897541EN indice: D0-1
General Glossary UF Functionnal Unit (cubicle + mobile part + Sepam) Nota: this document is available for all the units ordered from the 1st of March 2008. Gas exhaust AD4 RD4 CL4 - GL4 TT4 AD4 RHB - RHC DI4 TT TC VPIS LV MV SMALT BB Basic version, without internal arc withstand Incomming / outgoing cubicle Incomming / outgoing cubicle (without circuit-breaker) Withdrawable line coupling cubicle Mesurement and busbar earthing cubicle Cubicle with busbar connection from the top Fuse switch outgoing cubicle Voltage transformer Current transformer or current sensor Voltage Presence Indicating System Low voltage Voltage class 24 kv Earthing switch Busbar Mobile part SF ERT Extraction table Withdrawable circuit-breaker with SF6 breaking which is used in AD4 and CL4 cubicles Rack-in or rack-out and removal tool of the mobile parts on the ground Extraction or insertion table without the removal tool of the mobile parts on the ground Symbols Operation position. SMALT operation Open earthing switch mechanical indicator. Close earthing switch mechanical. 2-07897541EN indice: D0
General Mobile part operation Operating position. Plug-in position. Withdrawn position. Insertion / extraction position. Recommendations Height (H) of ceiling for tunnel installation It is necessary to have a height of ceiling H u 2.80m to install a tunnel (even 2.90m for internal arc performance 31.5kA - 0.15s). Installation above the switchboard All type of equipment installation such as lamp or light are forbidden. Marking It is compulsory forbidden to walk on the parts bearing this marking. It is compulsory forbidden to remove the parts bearing this marking when the equipment is energised. 07897541EN indice: D0-3
General description AD4 unit Without VTs A : LV compartment access door B : circuit-breaker compartment access door C : circuit-breaker inspection windows : status O - F D : circuit-breaker operating and interlocking panel E : voltage indicators F : earthing switch operating and interlocking panel G : MV cable compartment access door H : selector for locking the circuit-breaker in disconnected position 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : MV cable compartment 5 : circuit-breaker compartment 6 : gas discharge flaps 7 : withdrawable SF1 circuit-breaker 8 : MV cable connection terminals 9 : earthing switch 10 : earthing switch operating mechanism 11 : CTs 4-07897541EN indice: D0
General description AD4 unit With withdrawable A : LV compartment access door B : circuit-breaker compartment access door C : circuit-breaker inspection windows : status O - F D : circuit-breaker operating and interlocking panel E : voltage indicators F : earthing switch operating and interlocking panel G : MV cable compartment and VT's access door H : VT fuse operating and locking panel I : selector for locking the circuit-breaker in disconnected position J : fuse position inspection windows 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : MV cable compartment 5 : circuit-breaker compartment 6 : VT compartment with draw-out fuses 7 : gas discharge flaps 8 : withdrawable SF circuit-breaker 9 : MV cable connection terminals 10 : earthing switch 11 : earthing switch operating mechanism 12 : VTs 13 : CTs 07897541EN indice: D0-5
General description AD4 unit With fixed 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : MV cable compartment 5 : circuit-breaker compartment 6 : fixed VT compartment 7 : gas discharge flaps 8 : withdrawable SF2 circuit-breaker 9 : MV cable connection terminals 10 : earthing switch 11 : earthing switch operating mechanism 12 : VTs 13 : CTs 6-07897541EN indice: D0
General description AD4 unit with toroidal CT Without VTs A : LV compartment access door B : circuit-breaker compartment access door C : circuit-breaker inspection windows D : circuit-breaker operating and interlocking panel E : voltage indicators F : earthing switch operating and interlocking panel G : MV cable compartment access door H : selector for locking the circuit-breaker in disconnected position 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : MV cable compartment 5 : circuit-breaker compartment 6 : gas discharge flaps 7 : withdrawable SF2 circuit-breaker 8 : MV cable connection terminals 9 : earthing switch 10 : earthing switch operating mechanism 11 : CTs 07897541EN indice: D0-7
General description AD4 RHC-RHB (for unit incoming from the top) Without VTs A : LV compartment access door B : circuit-breaker compartment access door C : circuit-breaker inspection windows D : circuit-breaker operating and interlocking panel E : voltage indicators F : earthing switch operating and interlocking panel G : MV cable compartment access door H : selector for locking the circuit-breaker in disconnected position AD4 RHC 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : MV cable compartment 5 : circuit-breaker compartment 6 : incoming/outgoing cables 7 : withdrawable SF1 circuit-breaker 8 : MV cable connection terminals 9 : earthing switch 10 : earthing switch operating mechanism 11 : CTs 8-07897541EN indice: D0
General description CL4-GL4 unit With withdrawable VTs A : LV compartment access door B : circuit-breaker compartment access door C : circuit-breaker inspection windows D : circuit-breaker operating and interlocking panel E : MV cable compartment access door F : VT fuse operating and locking panel G : selector for locking the circuit-breaker in disconnected position H : fuse position inspection windows I : busbar space access door CL4 unit 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : cables for voltage measurement on upstream busbars 5 : circuit-breaker compartment 6 : VT compartment with draw-out fuses 7 : gas discharge flaps 8 : withdrawable SF circuit-breaker 9 : VT's 07897541EN indice: D0-9
General description CL4-GL4 unit With fixed VTs A : LV compartment access door B : circuit-breaker compartment access door C : circuit-breaker inspection windows D : circuit-breaker operating and interlocking panel E : MV cable compartment access door F : selector for locking the circuit-breaker in disconnected position G : busbars access door CL4 unit 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment - upper busbars - lower busbars 4 : cables for voltage measurement on upstream busbars 5 : circuit-breaker compartment 6 : fixed VT compartment 7 : gas discharge flaps 8 : withdrawable SF circuit-breaker 9 : VT's 10-07897541EN indice: D0
General description CL4 unit With upstream CTs 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment - upper busbars - lower busbars 4 : upstream CTs 5 : circuit-breaker compartment 6 : fixed VT compartment 7 : gas discharge flaps 8 : cables for voltage measurement on upstream busbars 9 : withdrawable SF circuit-breaker 10 : VT's 07897541EN indice: D0-11
General description GL4 unit 2500A without CTs with fixed VTs 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment - upper busbars - lower busbars 4 : fixed VT compartment 5 : gas discharge flaps 6 : VT's With CTs and with withdrawable VTs 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment - upper busbars - lower busbars 4 : VT compartment with draw-out fuses 5 : gas discharge flaps 6 : VT's 12-07897541EN indice: D0
General description TT4 unit With withdrawable VTs A : LV compartment access door B : circuit-breaker compartment access door C : circuit-breaker inspection windows D : fuse position inspection windows E : voltage indicators F : earthing switch operating and interlocking panel G : MV cable compartment access door H : VT fuse operating and locking panel 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : VT compartment with draw-out fuses 5 : gas discharge flaps 6 : earthing switch 7 : earthing switch operating mechanism 8 : VTs 07897541EN indice: D0-13
General description TT4 unit With fixed VTs A : LV compartment access door B : circuit-breaker compartment access door C : circuit-breaker inspection windows D : fuse position inspection windows E : voltage indicators F : earthing switch operating and interlocking panel G : access door to the earthing switch and to the VT fuse H : VT fuse operating and locking panel 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : fixed VT compartment 5 : gas discharge flaps 6 : earthing switch 7 : earthing switch operating mechanism 8 : VTs 14-07897541EN indice: D0
General description RD4 unit A : LV compartment access door B : circuit-breaker compartment access door C : circuit-breaker inspection windows D : access door to the compartment of MV cables connecting E : voltage indicators F : earthing switch operating and interlocking panel 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : gas discharge flaps 5 : earthing switch 6 : earthing switch operating mechanism 07897541EN indice: D0-15
General description DI4 unit A : LV compartment access door B : voltage indicator C : MV cable compartment access door D : switch and fuse compartment access door 1 : LV auxiliary circuits duct 2 : LV compartment 3 : busbar compartment 4 : MV cable compartment 5 : gas discharge flaps 6 : switch and earthing switch 7 : fuses 8 : switch and fuses compartment 16-07897541EN indice: D0
General description Withdrawable mobile part Withdrawable SF circuit-breakers SF1-16 ka - 630 A SF1-25 ka - 1250 A SF2-31.5 ka - 2500 A Sectionalizing truck SF1-25 ka - 1250 A SF2-31.5 ka - 2500 A Main busbar earthing truck SF1-25 ka - 1250 A SF2-31.5 ka - 2500 A 07897541EN indice: D0-17
General description Identification Functional unit A : feeder name B : manufacturer s plate C : nameplate (serial number, ratings, etc.) SF circuit-breaker D : nameplate (serial number, ratings, etc.) 18-07897541EN indice: D0
General description Description of front panels Circuit-breaker 1 : mechanical opening push-button (red) 2 : circuit-breaker position and handling selector 3 : hole for inserting the crank to move the circuit-breaker A : mechanical indicator of circuit-breaker position B : key-lock in service position for sectionalizing trucks (on request for circuit-breakers) Earthing switch,voltage indicators, locking devices K : voltage indicators L : mechanical indicator of earthing switch position 4 : earthing switch position selector 5 : hole for inserting earthing switch operating crank P : selector for padlocking the circuitbreaker in disconnected position Q : keylock for locking the circuit-breaker in disconnected position R : earthing switch keylocks (option) S : earthing switch electro-mechanical lock pushbutton (option) Withdrawable voltage transformers 6 : draw-out fuse position selector 7 : hole for inserting draw-out fuse operating crank 07897541EN indice: D0-19
General description Circuit-breaker service trolley Extraction and lowering tool A : crank B : connecting device to the units C : circuit-breaker supporting rail D : locating pins for matching to the units E : wheel brake The support C rails might be adjusted independently by an action the lever A one side only. Main features of the circuit-breaker extraction table A : connecting device to the units B : circuit-breaker supporting rail C : locating pins for matching to the units D : wheel brake E : crank for width adjustment F : screw for height fixing G : screws for compensation of floor unevenness 20-07897541EN indice: D0
General description List of accessories supplied - Circuit-breaker service trolley. - 1 operating crank. - 1 busbar earthing truck (option). - 1 phase comparison device (option). Operating crank 07897541EN indice: D0-21
Access to the interior of the units AD4 No access from the rear Access to the rear adjustment bolts through the cable basement or trench. Additional cable access from the front. Access to the main busbar. Access to MV cables, VTs, earthing switch, CT secondaries or toroidal CT, access to the rear adjustment bolts. Access to the circuit-breaker (AD4). Access to LV compartment. Access to the LV terminal boards and to the internal arc detector. 22-07897541EN indice: D0
Access to the interior of the units CL4 (bus-section) No access from the rear Additional access to lower main busbar from the front. Access to the main busbar. Access to VTs, access to lower main busbar, access to the rear adjustment bolts. Access to the circuit-breaker. Access to the LV compartment. Access to the LV terminal boards and to the internal arc detector. 07897541EN indice: D0-23
Access to the interior of the units CL4 (bus-section) With upstream CT s Access from the rear is imperative for this version Additional access to the lower main busbar from the front. Access to the main bubars. Access to VT s and lower main busbar. Access to the rear adjustment bolts. Access to the circuit-breaker. Access to the LV compartment. Access to the LV terminal and to the internal arcing detector. Access to the CT s and to the voltage cable measurment. 24-07897541EN indice: D0
Access to the interior of the units GL4 (bus-riser) No access from the rear Additional access to lower main busbar from the front. Access to the main busbar. Access to the CT secondaries, access to the lower main busbar, access to the rear adjustment bolts. Access to the LV compartment. Access to the LV terminal boards and to the internal arc detector. 07897541EN indice: D0-25
Access to the interior of the units TT4 No access from the rear Additional access to the lower main busbar from the front. Access to the main busbar. Access to the VTs, earthing switch, access to the lower connections, access to the rear adjustment bolts. Access to the LV compartment. Access to the LV terminal boards and to the internal arc detector. 26-07897541EN indice: D0
Access to the interior of the units DI4 No access from the rear Access to the rear adjustment bolts through the cable basement or trench. Access to the main busbar (if a single DI4 unit is placed side by side to other units, it is easier to get access from the busbar compartments of the adjacent units). Access to MV cables, earthing switch, access to the rear adjustment bolts. Access to the LV compartment. Access to the LV terminal boards and to the internal arc detector. 07897541EN indice: D0-27
Access to the interior of the units AD4 RHC Access from the rear is imperative for this version. Access to MV cables. Access to the rear adjustment bolts through the cable basement or trench. Additional cables access from the front. Access to the main busbars. Access to VT s, earthing switch and CT s secondaries. Access to the rear adjustment bolts. Access to the circuit-breaker. Access to the LV compartment. Access to the LV terminal and to the internal arcing detector. Access to MV cables. 28-07897541EN indice: D0
Procedure to draw-out/ draw-in Procedure to draw-out the mobile part Warning The mobile part shall be move with the extraction tools only. Do note apply effort on the connection arms. The extraction of the mobile part shall be done when the units have been laid on the floor. Starting condition Unit with circuit-breaker in disconnected / test position. - Open the access door to the circuit-breaker compartment. At the 1st extraction: - Remove the strap part (1). - Remove the block which hold the rod in upper position (2). - Unplug the connector of LV circuits. Extraction of the mobile part (procedure is the same with an ERT or an extraction table) - Move the extraction tool into position in front of the unit (take care that the locating pins engage with the holes provided on the unit). - Lock the trolley in position by pushing and turning the two latching handles in the indicated way. - After the operation, make sure that the trolley is locked. - Turn the selector 2 to the position marked with.then remove the circuit-breaker; pull it out until it comes against the stops of trolley. - Lock the wheels by pressing the brake. Warning During this operation the circuit-breaker springs can be tripped automatically. 07897541EN indice: D0-29
Procedure to draw-out/ draw-in - Return selector to the position. - Unlock the trolley from the unit by turning the two handles in the indicated way. - Release the brakes on the trolley wheels. - Take away the trolley (1). Closing the MV door - Lower the shutter. To close the door without the circuit-breaker inside: - push the hook A to the top, - push the locking part B in the indicated position, then let A free. The locking system will reset automatically when the circuit-breaker is inserted. 30-07897541EN indice: D0
Procedure to draw-out/ draw-in Leaving the mobile part on the floor (only with ERT) - Put the circuit-breaker on the ground by turning the crank (2). - Set the selector 2 to position. - Take away the trolley. 07897541EN indice: D0-31
Procedure to draw-out/ draw-in Procedure to draw-in the mobile part Starting conditions - Cubicle: the circuit-breaker compartment door is open. - ERT: the rails of trolley are in the lowered position. - Circuit-breaker: it is on the floor with the selector 2 in the position marked. ERT - Move the trolley under the circuit-breaker until it comes against the stop. - Set selector 2 to position. - By turning the crank (1), lift the circuit-breaker up to the insertion level. Insertion with the ERT or with extraction table - Approach the trolley with the circuit-breaker in front of the unit. - Move the trolley into position in front of the unit; take care that the locating pins engage with the holes provided on the unit. 32-07897541EN indice: D0
Procedure to draw-out/ draw-in - Lock the trolley in position by pushing and turning the two latching handles (after the operation, make sure that the trolley is locked). - Lock the wheels by pressing the brakes. - Set the selector 2 to position. - Push the circuit-breaker into the circuit-breaker compartment until it stops. - Set selector 2 to position. - Unlock the trolley from the unit by turning the two handles and then pulling them out. - Release the brakes on the trolley wheels. - Remove the trolley. 07897541EN indice: D0-33
Procedure to draw-out/ draw-in - Push and hold the locking device (A - B). - Plugging-in the connector of LV circuits (C). - Lift the black shutter located on the back of the door before closing the door. If the connector is not properly inserted, the locking device will prevent the door from being closed. 34-07897541EN indice: D0
Procedure to draw-out/ draw-in Procedure to extract the VTs and opening the MV cable compartment For units equipped with withdrawable VTs Remove the circuit-breaker (see circuitbreaker extraction procedure page 30). Tools - flat wrench 10 (A). - flat wrench 13 (B). - ratchet wrench 10 (D). Tools Crank supplied. Close the earthing switch (see page 53). We recommend that you lock it in this position: - see page 57 (padlocking), - see page 60 (keylocking). - Draw-out the VT fuses as per procedures (see page 56). - Open the disconnector protecting the VT secondaries placed in the LV compartment. - Loosen the 2 screws using the operating crank handle. - Open the door leading to the MV cable connection compartment. 07897541EN indice: D0-35
Procedure to draw-out/ draw-in - Disconnect the VT secondaries LV connection connector. - Remove the 2 screws. - Unbolt the 5 nuts and withdraw the closing cross-bar. - Extract the VT compartment. 36-07897541EN indice: D0
Procedure to draw-out/ draw-in Units equipped with fixed VTs Tools - flat wrench 10 (A). - flat wrench 13 (B). - ratchet wrench 10 (D). Tools Crank supplied. Close the earthing switch (see page 53). We recommend that you lock it in this position: - see page 57 (padlocking), - see page 60 (keylocking). - Open the disconnector protecting the VT secondaries placed in the LV compartment. - Close the earthing switch (see page 53). - Loosen the 2 screws using the operating crank. - Open the door leading to the MV cable connection compartment. Disconnect the VT secondaries LV connection connector. 07897541EN indice: D0-37
Procedure to draw-out/ draw-in - Disconnect the connection bar of each VT by unscrewing the nut. - Remove the 2 bolts. - Remove the 5 nuts fixing and the crosspiece. - Remove the VT assembly, by running it on its wheels. To have an easier access inside the cubicle, remove the bottom sheet of the circuit-breaker compartment and the barriers between phases. - Open the circuit-breaker compartment door. - Remove the bottom plate of the circuitbreaker compartment by unscrewing the 4 fixing bolts. - Remove the barriers between phases following the sequence indicated in the figure. - Close again the circuit-breaker s and VTs compartment doors. 38-07897541EN indice: D0
Procedure to draw-out/ draw-in Procedure to insert the VT s and closing the MV cable compartment Unit without VTs Tools - flat wrench 10 (A). - flat wrench 13 (B). - ratchet wrench 10 (D). Tools Crank supplied. Put in place the barriers between phases following the sequence indicated in the figure. Remount the bottom plate of the circuitbreaker compartment and fasten it by means of the 4 bolts provided. Put the circuit-breaker back into its compartment (see page 33). Close the door and secure it by means of the 2 bolts, to be tightened with the operating crank. - Open the earthing switch (see page 54). 07897541EN indice: D0-39
Procedure to draw-out/ draw-in Unit equipped with withdrawable VTs Tools - flat wrench 10 (A) - flat wrench 13 (B) - ratchet wrench 10 (D) Tools Crank supplied. (provided) Put in place the barriers between phases following the sequence indicated in the figure. Remount the bottom plate of the circuitbreaker compartment and fasten it by means of the 4 bolts provided. Put the circuit-breaker back into its compartment. Replace the VT truck into position. Plug-in the connector of the VT secondaries. 40-07897541EN indice: D0
Procedure to draw-out/ draw-in Remount the crosspiece across the front bottom by means of the 5 nuts and 2 bolts provided. Close the door and secure it by means of the 2 bolts, to be tightened with the operating crank. Put the VT fuses in the inserted position by following the proper operating sequence (see page 51). Close the MCCB of the VT secondaries. Open the earthing switch (see page 54). 07897541EN indice: D0-41
Procedure to draw-out/ draw-in Unit equipped with fixed VTs Tools - flat wrench 10 (A). - flat wrench 13 (B). - ratchet wrench 10 (D). Tools Crank supplied. - Put in place the barriers between phases following the sequence indicated in the figure. - Replace the VTs. - Connect the connection bar of each TV by screwing the nut. - Remount the bottom plate of the circuitbreaker compartment and fasten it by means of the 4 bolts provided. - Put the circuit-breaker back into its compartment (see page 33). - Plug-in the connector of the VT secondaries. 42-07897541EN indice: D0
Procedure to draw-out/ draw-in - Remount the crosspiece across the front bottom by means of the 5 nuts and 2 bolts provided. - Close the door and secure it by means of the 2 bolts, to be tightened with the operating crank. - Close the MCCB of the VT secondaries. Open the earthing switch (see page 54). 07897541EN indice: D0-43
Procedure to draw-out/ draw-in Installation of fuses in a DI4 unit Install FUSARC type fuses with medium type strikes according to CEI 32-3IEC 282-1 and DIN 43-625. For different types of fuse, please contact. - The striker end of the fuse is marked. - The fuse characteristics and direction of mounting are printed on the fuse. The striker end shall be the upper one. - Turn the fuse so that the label is on the front. - Open the unit MV compartment. - Insert the field control rings at both the fuse ends, starting from the inner phase. Fuses should never be held in the middle. Open the upper field control screen by using the top end of the fuse. - Insert the bottom end of the fuse into the lower fixed contact. - Then fit the top of the fuse in the upper contact and check that the field screen is properly closed. - Position the label to the front of the unit. 44-07897541EN indice: D0
Testing arrangements MV cable voltage indicators Unit equipped with VPIS boxes VPIS: Voltage Presence Indicating System, a box containing 3 built-in lamps. Technical data: The voltage presence indication is given on the voltage range provided for by the IEC 61958. Instructions for use The VPIS must not be used as a VDS (Voltage Detecting Systems) Indication of a VPIS alone is insufficient to ensure that the system is deenergised: if operating rules so require, appropriate voltage detectors according to IEC 61243 must be used for this purpose. A : voltage presence indicating lamp (1 for each phase). B : connection point used to connect a phase comparator. Phasing out As from energisation of cables, the voltage presence indicator lamps must come on. Phase balance: the lamp does not come on. Phase unbalance: the lamp comes on. MV cable testing WARNING During cable testing, some safety devices are made inoperative, therefore the personnel in charge shall be duly informed and trained. Conditions during the test - Earthing switch open (see page 54). - Testing leads connected to the MV cable lugs. - Circuit-breaker in disconnected position (see page 52). - Check there is no voltage on the VPIS. WARNING Max test voltage is 60kV cc for 15 minutes. For higher values, please contact. 07897541EN indice: D0-45
Testing arrangements AD4 unit Check that the MV cables are dead. The voltage indicating lamps shall be off. Close the earthing switch.(see page 53). It is recommended to lock the earthing switch in closed position (to lock by padlock, see 57). - Open the door after removing the 2 fixing bolts. - If provided, remove the VT truck (see pages 36 to 39), - If present, disconnect the lightening arresters. - Connect the leads from the testing equipment to the MV cable lugs. 46-07897541EN indice: D0
Testing arrangements WARNING The operation described is allowed only for testing configuration; this operation, performed when the switchboard is in service, is extremely dangerous because it makes the operator reach the live parts. Make ineffective the interlock preventing the opening of the earthing switch with open door by entering the slot indicated with a screwdriver and pushing it down-wards. This operation gives access to the operating shaft of the earthing switch. - Open the earthing switch (see page 54) and carry out the test. After performing the test: - Close the earthing switch (see page 53). - Remove the test leads. If provided, connect the lightening arresters. If provided, install the VT truck (see page 40 up to the instructions of closing the VT front panel). - Close the MV cable compatment door and secure it by fixing the 2 bolts. 07897541EN indice: D0-47
Operating instructions Circuit-breaker plug-in procedure - Lower the protective flap for pushbutton 1. - Press and hold down push-button 1 while setting selector 2 to. Starting conditions - Earthing switch in open position. - Circuit-breaker in test position. - Door of circuit-breaker compartment closed. - Locking selector P in horizontal position (this may require availability of the relevant unlocking key). This operation trips the circuit-breaker and prevents closing during insertion. In case of earthing or sectionalizing trucks (option), the key H be required to make the insertion possible. - Insert the crank into hole 3. - Move in the circuit-breaker turning the crank clockwise until the position indicator reads - Set selector 2 to service position. Note: Until the selector 2 is set in position, it is not possible to close the circuit-breaker even if this is connected to the main circuit). Lift the shutter protecting push-button 1. - Now it becomes possible to electrically operate the circuit-breaker energizing the connected circuit. The symbols marked on the black front cover summarize the above-mentioned procedure. 48-07897541EN indice: D0
Operating instructions Circuit-breaker withdrawal procedure Starting conditions - Circut-breaker in service position. - Lower the shutter protecting push button 1. - Press and hold down push button 1 while setting selector 2 to. This operation trips the circuit-breaker and prevents closing during withdrawal. - Insert the crank into hole 3. - Withdraw the circuit-breaker turning the crank counter-clockwise until the position indicator reads. - Set selector 2 to disconnected position. - Lift the shutter protecting push button 1. The circuit-breaker is in disconnected/test position. The symbols marked on the black front cover summarize the above-mentioned procedure. 07897541EN indice: D0-49
Operating instructions Earthing switch closing procedure Starting conditions - Earthing switch is open. - The circuit-breaker is in disconnected or test/disconnected position or removed from the unit. - Remove possible keys or padlocks preventing the earthing switch operation. Verify that the voltage indicating lamps are off. - If the unit is equipped with earthing switch electrical locking, press the button on the coil placed on the LV compartment door. - Set selector 4 to. This operation requires first to pull outward the selector and then to turn it. - Insert the crank into hole 5. - Turn it clockwise until the earthing switch position indicator reads on. Turn selector 4 clockwise to position I. - The earthing switch is in closed position. - The MV cables are short circuited and earthed. - The symbols marked on the yellow front cover summarize the above-mentioned procedure. 50-07897541EN indice: D0
Operating instructions Earthing switch opening procedure Starting conditions - The earthing switch is closed. - The circuit-breaker is in disconnected or test/disconnected position. - Remove possible key or padlocks preventing the operation of earthing switch. - If the unit is equipped with earthing switch electrical locking, press the button on the coil placed on the LV compartment door. Set selector 4 to. This operation requires first to pull outward the selector and then to turn it. Insert the crank into hole 5 and turn it counter clockwise until the earthing switch position indicator reads off. Turn selector 4 counter clockwise to position O. The earthing switch is in open position. The symbols marked on the yellow front cover summarize the above-mentioned procedure. 07897541EN indice: D0-51
Operating instructions Procedure for plugging in withdrawable VT fuses Starting conditions - MV cable compartment access door closed. - Selector 6 in position Set selector 6 to. This operation requires first to pull outward the selector and then to turn it. - Insert the crank into hole 7, - Turn it clockwise until further rotation becomes impossible. Set selector 6 to inserted position. With this operation the VT secondaries are connected to the downstream circuits. The symbols marked on the blue front cover summarize the above-mentioned procedure. 52-07897541EN indice: D0
Operating instructions Procedure for drawing out withdrawable VT fuses Starting conditions - Selector 6 in position Set selector 6 to. This operation requires first to pull outward the selector and then to turn it. This operation disconnects the VT secondaries. Insert the crank into hole 7 and turn counter clockwise until further rotation becomes impossible. Set selector 6 to withdrawn position. The symbols marked on the blue front cover of the circuit-breaker summarize the abovementioned procedure. 07897541EN indice: D0-53
Operating instructions Padlocking 6 to 8 mm - diameter padlocks Maximum number of padlocks for incoming,outgoing, bus-section units. 3 on circuit breaker position selector. 1 on the shutter protecting the mechanical opening push-button. 3 on earthing switch selector 4. 1 on each shutter applied to the lifting shutter mechanism. 3 on VT fuse selector in plugged or drawnout position. To prevent insertion of a circuitbreaker from test/disconnected position 1 to 3 padlocks applied to the circuit-breaker position selector in vertical position. To prevent mechanical opening of a circuit-breaker in service position If applied in disconnected or removed position, the padlock prevents the circuitbreaker from being moved to service position. 1 padlock applied to the shutter protecting the mechanical opening push-button. 54-07897541EN indice: D0
Operating instructions To lock the earthing switch in open or closed position Earthing switch open: padlock on selector 4 to prevent closing. Earthing switch closed: padlock on selector 4 to prevent opening. To prevent the opening of both shutters interlocking devices A and B up-locked When the interlocking devices A and B are up-locked, they prevent the shutters from being opened. The mechanism activating the shutter is located on the left-hand side inside the circuit-breaker compartment. Lift the parts A and B shown in the figure and insert the padlock into the three holes aligned. To prevent the opening of the upper shutter interlock device C up-locked When the interlocking device C is up-locked, it prevents the upper shutter from being opened. The mechanism activating the shutter is located on the left-hand side inside the circuit-breaker compartment. Lift the part C shown in the figure and insert the padlock into the two holes aligned. 07897541EN indice: D0-55
Operating instructions To lock insertion or withdrawal of the VT fuses Fuses inserted: padlock applied to selector 6 to prevent withdrawing. Fuses disconnected: padlock applied to selector 6 to prevent insertion. 56-07897541EN indice: D0
Operating instructions Keylocking Maximum number of keylocks Circuit-breaker : 1 keylock. Earthing switch : 2 keylocks. Sectionalizing and earthing truck : 1 keylock. Locking the circuit-breaker To prevent the circuit-breaker from being put in service position. The key is released when the circuit-breaker is in test/disconnected position or removed from the unit. Locking the earthing switch To prevent operation as required by the particular unit. Keys can be released in different combinations: - 1 or 2 keys released in closed position. - 1 or 2 keys released in open position. - 1 key released in closed position and 1 key released in open position. Locking the sectionalizing/earthing truck The key is released only when the sectionalizing/earthing truck is plugged-in in position. To prevent withdrawal 07897541EN indice: D0-57
Operating instructions DI4 unit Operation and position indication I: charged/uncharged indication. CI2 operating mechanism front plate Earthing switch opening procedure Starting condition: the mimic diagram shows that the earthing switch is closed. - Close the MV compartment access door, - Insert the operating crank into the earthing switch operating mechanism slot, - Rotate counter-clockwise to open the earthing switch, - Take out the crank at the end of the sequence. - The mimic diagram shows that the earthing switch is open. 58-07897541EN indice: D0
Operating instructions Closing the switch disconnector Starting condition: the mimic diagram shows that the switch disconnector is open. Charging the spring: - Insert the operating crank into the spring charging slot (A) and rotate it clockwise, - Take out the crank when the mechanical indicator (B) shows the operating mechanism spring charged. Closing the switch-disconnector by pushing the push botton I (indicated in the drawing) Final condition: the mimic diagram shows that the switch-disconnector is closed. Opening the switch disconnector Starting condition: the mimic diagram shows that the switch is closed. 07897541EN indice: D0-59
Operating instructions Press the push botton 0 (indicated in the drawing) Final condition: the mimic diagram shows that the switch-disconnector is open. Earthing switch closing procedure The synoptic diagram shows that the earthing switch is open. Close the earthing switch after verifying that the MV cables live (see page 53). - Insert the operating crank into the earthing switch operating mechanism slot, - Rotate clockwise to close the earthing switch, - Take out the crank at the end of the sequence, - Close the MV cable compartment door. Final condition: the mimic diagram shows that the earthing switch is closed. 60-07897541EN indice: D0
Operating instructions Fuse indications Fuses efficient (white indicator). One or more fuses blown (red indicator). Padlocking - Padlocking of motor mechanism. (option). - It is possible to discharge the motor mechanism, by locking the electrical charging of the closing spring and carring out a complete O-C-O cycle. - Lock out the motor mechanism using a padlock before opening the switch. - The motor mechanism can be locked in or out using the padlocks. Padlock the switch-disconnector in open or closed position using 1, 2 or 3 padlocks (Ø 8 mm). Padlock the earthing switch in open or closed position using 1, 2 or 3 padlocks (Ø 8 mm). 07897541EN indice: D0-61
Operating instructions Operating safety The front door can be removed or fitted only if the earthing switch is closed. 62-07897541EN indice: D0
Maintenance instructions Premise For any other operation, call the nearest representative. Corrective maintenance operations make possible the replacing of misfuncioning subassembly. The operations listed on the resuming table below can be carried-out by the client or representatives. After each maintenance operation, it necessary to perform the test according to the international standards. Attention: during replacing any subassembly, all the accessories listed below shall be replaced with new ones: - Self-locking nuts. - Contact rings. - Snap rings. - Split pins. Resuming table Description In charge to Notes Replacement of voltage presence indicating system for AD4 unit Cust./ See following pages Replacement of voltage presence indicating system for AD4 unit Cust./ See following pages Replacement of a fuse for AD4 unit Cust./ See following pages Replacement of a fuse for DI4 unit Cust./ See following pages Replacement of a bushing insulator AD4 unit Replacement of a current transformer (CT) Installation/replacement of the keylock for locking the circuit-breaker Cust./ Installation/replacement of the earthing switch keylocks Cust./ Installation/replacement of the keylock preventing the sectionalizing truck to be disconnected Cust./ Main busbar change of ratio Installation of an earthing switch Replacement of the earthing switch blades and contacts Replacement of the earthing switch operating mechanism Installation/replacement of an omopolare transformer MG for relays SEPAM on a MV cable How to get access to the MV compartment when the circuit breaker is locked in closed position Replacement of a VT (fixed or withdrawable fuse versions) Installation of the VTs (fixed or withdrawable fuse versions) Please refer to the Replacement of the VT MV spring contact Cust./ nearest Schneider Replacement of the handle of MV-LV compartment door Cust./ Electric representatives. Stepping up the number of cables Installation/replacement of anti-condensation heater Cust./ Replacement of shutters and relevant operating mechanism Replacement of the post insulator Removal of a unit from the switchboard Replacement of the circuit-breaker auxiliay contacts Cust./ Installation of the earthing switch position auxiliary contacts Replacement of the earthing switch position auxiliary contacts Cust./ Replacement of the VT truck auxiliary contacts Cust./ Replacement of a capacitive insulator Replacement of a fixed disconnecting contact CT change of ratio Cust./ VT change of ratio Cust./ Replacement of the earthing switch electromechanical lock Cust./ Replacement of the LV cabinet Intervention on relays Refer to CB manual Propulsion Refer to CB manual Circuit-breaker SF1-SF2 Refer to CB manual 07897541EN indice: D0-63
Maintenance instructions AD4 unit Replacing the VPIS (voltage presence indicating system) Extract the VPIS box and disconnect the connector at its rear. Replacing the VT fuses Starting conditions Earthing switch in open position (see page 54). VT fuses in drawn-out position (see page 56). Operations In order to replace the fuses follow this procedure: - Remove the two socket head bolts securing the access door by using the operating crank. - Open the access door. - Remove the caps from the fuse holders by turning them counter-clockwise. - Replace the fuse inserting the new fuse so that the striker is turned towards the front of the unit. Note The VT fuses can be replaced without putting out of service the unit. The front door of the VT compartment can be safely opened with the earthing switch in open position. In fact, the VT truck remains fixed to the unit as long as the earthing switch is in open position. Only by closing the earthing switch the VT truck is unlocked and can be removed from the unit. Restoring to service conditions Carry-out in inverse order the sequence described. - Insert the VT fuses (see page 55). 64-07897541EN indice: D0
Maintenance instructions DI4 unit Replacing the VPIS (voltage presence indicating lamps) - Remove manually the indicating lamps from their place. - The switchboard can remain energised. - Install the new lamps by pushing them in position. Replacing VT fuses Starting conditions - Unit de-energised. - Switch-disconnector in open position (see page 52). - Earthing switch in closed position (see page 54). - Open the door to get access to the fuses. IMPORTANT NOTE: according to CEI 282.1 23.2 it is recommended to replace all the three fuses even if one single fuse has burst. How to remove the fuse Remove the fuse from the upper field control screen. Remove completely the fuse from the upper end. Install FUSARC type fuses with medium type striker pin according to IEC 282-1 and DIN 43-625. For different types of fuse, please contact. The striker end of the fuse is marked. - The fuse characteristics and direction of mounting are printed on the fuse. The striker end shall be the upper one. - Turn the fuse so that the label is on the front. 07897541EN indice: D0-65
Maintenance instructions - Fuses should never be held in the middle. - Open the upper field control screen by using the top end of the fuse. - Insert the bottom end of the fuse into the lower fixed contact. - Then fit the top of the fuse in the upper contact and check that the field screen is properly closed. 66-07897541EN indice: D0
group service centers are there to provide: - engineering and technical assistance, - commissioning, - training, - preventive and corrective maintenance, - adaptation work, - spare parts. Call your sales representative who will put you in touch with your nearest group service center or directly call the following telephone number: +33 (0)4 76 57 60 60 Grenoble France. 07897541EN - REV. D0 a Industries SAS All rights reserved. Industries SAS 89, boulevard Franklin Roosevelt F-92505 Rueil-Malmaison Cedex Tel: +33 (0)1 41 29 85 00 www.schneider-electric.com www.merlin-gerin.com As standards, specifications and designs change from time to time, please ask for confirmation of the information given in this publication. This document has been printed on ecological paper. Publishing: Industries SAS. Design: Profil. Printing: 07897541EN - REV. D0 03/2008