Siemens 3AP2-FI Operation & Maintenance Manual Download

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5 Operation

5.1.6

Recommended Procedure in the Event of Irregularities on the Circuit-Breaker 3AP2 Fl

)

Note

The following table is an aid in recognition and assessment of any irregularities occuring in operation of
the circuit-breaker.

It also enables specific details to be given if Siemens service Berlin personnel have to be summoned. In
such a case, please telephone during business hours

Tel.: +91 240 2565 142

or by fax

+91 240 2554 701

WARNING

To avoid any hazard, only qualified personnel may do the work described below.

WARNING

Work may only be done on the operating mechanism when the opening and closing spring are relaxed.

WARNING

The circuit-breaker must be switched off and earthed for SF

filling work.

The circuit-breaker can be switched back on when filling is complete and the earthing has been

disconnected.

Release the SF

-pressure before working on the screw connections of the gas chamber.

Summary of Contents for 3AP2-FI

Page 1: ...EAKER Owner JINDAL INDIA THERMAL POWER LIMITED Project 2 x 600 MW THERMAL POWER PROJECT Consultant TATA CONSULTING ENGINEERS Document Type O M Manual Information Only Document Number Document Name 400kV Circuit Breaker Manual SIEM JITPL 5404A EL 3 2112 Siemens Limited Aurangabad Copyright Siemens Ltd 2007 The reproduction transmission or use of this document or its contents is not permitted withou...

Page 2: ...1 s Operating Instructions Circuit Breaker 3AP2 Fl for rated voltage 420 kV 1003006a Siemens Ltd Siemens Ltd 2007 ...

Page 3: ...s please order them from the appropriate Siemens office indicating the title and order number Published by Siemens Ltd Power Transmission and Distribution High Voltage E 76 Waluj MIDC Aurangabad 431136 Tel 91 240 2554008 Fax 91 240 2554701 Subject to change All rights including rights of translation reproduction by printing copying or similar methods even of parts are reserved Offenders will be li...

Page 4: ...t IK 3 15 3 1 10 Further Technical Data 15 3 2 Circuit Breaker 16 3 3 Pole Column 18 3 4 Interrupter Unit 20 3 5 Arc Quenching 22 3 6 Spring Drive Mechanism of the Circuit Breaker 24 3 6 1 Charging the Closing Spring 24 3 6 2 Closing 24 3 6 3 Opening 25 3 6 4 Operating Sequence 25 3 7 Function of the Spring Drive Mechanism 26 3 7 1 Charging the Closing Spring 26 3 7 2 Closing 29 3 7 3 Tripping 34 ...

Page 5: ... the Operating Mechanism Cubicles 56 4 5 7 Assembling the Insulator Column 57 4 5 8 Erecting the Double Break Assembly 62 4 5 9 Lifting Plate 68 4 5 10 Coupling the Operating Mechanism 69 4 5 11 Connecting the Gas Pipes 70 4 6 Earthing and Connecting the Leads 72 4 6 1 Earthing 72 4 6 2 Work on High Voltage Terminals 72 4 6 3 Connecting the Leads 73 4 7 Filling the Circuit Breaker with Gas 74 4 7 ...

Page 6: ...enance Schedule 96 6 4 Work to be Carried Out in Accordance with the Maintenance Schedule 98 6 4 1 General Inspection 98 6 4 2 Drawing Off the SF6 Gas 98 6 4 3 Check of Contact System 99 6 4 4 Evacuating and Filling the Circuit Breaker with Gas 100 6 4 5 Check Gas Pressure Gauge 103 6 4 6 Testing the Density Monitor 103 6 4 7 Check for Leaks on Operational Circuit Breaker 104 6 4 8 Checks at Drive...

Page 7: ...aker together with certain supplementary warning notices They are intended to point out impermissible actions and to show the potential danger associated with operation of the circuit breaker Should further information be desired or should particular problems arise which are not covered sufficiently in the operating instructions the matter should be referred to the local Siemens sales office 2 1 1...

Page 8: ...ecautionary measures and points to be noted are listed below The accessory items required for installation operation and maintenance of the circuit breaker and for reasons of safety protecting clothes devices for manual operation warning signs hand lamps fire extinguishers etc must be stored neatly at a certain point and be checked regularly for completeness and proper functioning This also includ...

Page 9: ... therefore suitable for single and triple pole auto reclosing 3 1 1 Standards Regulations The circuit breaker together with the equipment and special tools supplied is in conformity with the statutory laws rules and standards applying at the time of delivery The specifications in IEC Publications 62271 100 The specifications in lEC Publications 60694 3 1 2 Operating Temperatures The circuit breake...

Page 10: ...ltage 900 kV 345 kV Flashover distance in air to earth 3180 mm across the open circuit breaker 3200 mm between phases see dimension drawing Minimum creepage distance over the insulators surfaces to earth 10050 mm across the open circuit breaker 10500 mm Table 1 Insulation rating 3 1 4 Electrical Data Rated voltage 420 kV Rated frequency 50 Hz Rated normal current 3150 A Rated short circuit breakin...

Page 11: ...es Minimum command duration Closing com mand 80 ms Minimum command duration Opening command 80 ms Closing time 65 ms 6 ms Opening time 23 ms 3 ms Rated break time 40 ms Close open time 60 ms 10 ms Dead time 300 ms Table 3 Operating times ...

Page 12: ...nal filling gauge pressure at 20 C 6 0 bar Monitoring of the SF6 Signal Loss ofSF6 at 20 C General lockout SF6 at 20 C 5 2 bar 5 0 bar Filter material complete circuit breaker 7 5 kg Table 4 Arc quenching medium SF6 3 1 7 Auxiliary Switch Rated voltage 250 VDC 220 VDC 125VDC 110VDC 60VDC 48VDC Rated normal current 10A 10A 10A 10A 10A 10A Switching capacity Resistive load 2 5 A 2 5 A 4A 5A 9A 10A R...

Page 13: ...4 Supply voltage 24VDC Operating tempera ture 40 C 85 C Output 4 20 mA CLOSE 18 mA OPEN 6 mA Resolution 0 2 ms Transmission Current loop max 500 m Table 7 Technical Data IK 3 3 1 10 Further Technical Data Note Technical Data for Trip voltage Control voltage Heater voltage Pressure monitoring for SF6 Charging motor of the spring drive mecha nism are indicated in the circuit diagram Note Technical D...

Page 14: ...tished insulators and each of them supports an double break interrupter assembly consisting of two interrupter units 22 with grading capacitors 23 connected in parallel and a bell crank mechanism 21 Control cabinet 12 is also located at pole B 15 1 12 21 11 Base 12 Control cubicle 15 1 Operating mechanism cubicle 16 Post insulator 21 Bell crank mechanism 22 Interrupter unit Fig 2 Design of the cir...

Page 15: ... pressure indicated by a manometer The energy required for switching is stored in one closing spring and one opening spring The closing and opening springs are located in the operating mechanism unit Control cabinet 12 which is attached to circuit breaker pole B contains the equipment for controlling and mon itoring the circuit breaker and the terminal blocks required for the electrical connection...

Page 16: ...y unit is mounted on post insulators which provide insulation against earth 22 22 15 16 3 15 11 15 9 15 15 8 3 15 Corner gear 15 11 Filter cowl 15 16 3 Filter bag 15 8 3 Shaft 15 9 Lever 16 Post insulator 16 9 Operating rod 18 27 1 Driving rod 21 Bell crank mechanism 22 Interrupter unit 22 1 Jacket 22 22 High voltage terminal Fig 3 Sectional view of pole column 15 ...

Page 17: ...perating mechanism rod 18 27 1 the shaft 15 8 3 the operating rod 16 9 and the bell crenk mechanism 21 The filter cowls 15 11 contains the filter material 15 16 3 which collects SF6 decompositon products and moisture residue 22 23 2 23 1 1001360a 22 Interrupter unit 23 Grading capacitor 23 1 Inner bracket 23 2 Outer bracket Fig 4 Arrangement of grading capacitor ...

Page 18: ...t carrier 22 32 Base 22 35 Cover 22 4 Tandem gear 22 41 Heat cylinder 22 45 Electrode 22 5 Guide rail 22 52 Pin 22 9 Pin Fig 5 Interrupter unit The main circuit of an interrupter unit consists of the high voltage terminal 22 22 the socket 22 32 the contact carrier 22 31 the contact laminations 22 3 arranged in rings in the contact carrier the heat cylinder 22 41 the inner socket 22 23 and the gear...

Page 19: ... interrupter unit A guide rail 22 5 is mounted at the nozzle 22 11 1 This engages with the control lever 22 46 via the pin 22 52 As a result the control lever is subjected to rotary movement causing linear movement of the pin against the direction of movement of the nozzle The electrode 22 45 is connected to the nozzle via the gears using two connecting rods and provides the pin with dielectric sh...

Page 20: ...9 KV 22 11 18 22 41 22 11 22 5 22 52 19 a 22 11 17 HV 22 11 2 22 3 22 11 1 22 9 22 51 22 46 22 56 b C d a CLOSED position b Opening main contact in OPEN position c Opening arcing contact in OPEN position d OPEN position HV Heating volume KV Compression volume 22 11 Tube contact 22 11 1 Nozzle 22 11 17 Piston 22 11 18 Valve plate 22 11 19 Valve group 22 11 2 Auxiliary nozzle 22 3 Contact lamination...

Page 21: ... the quenching gas to be forced in the direction opposite to the movement of the moving contact components through the non return valve consisting of piston 22 11 17 and valve plate 22 11 18 into the heat cylinder and through the gap between the tube contact 22 11 and the arc quenching nozzle thus quenching the arc With large short circuit currents the quenching gas surrounding pin 22 9 in the arc...

Page 22: ...s released by actuation of the trip coil 18 16 The energy of the discharging closing spring 18 4 is transmitted via the cam plate 18 6 to the lever 18 7 and the operating shaft 18 22 connected to it In the process the opening spring 18 11 is charged by means of the rotation of the operating shaft 18 22 the operating lever 18 24 and the connecting rod 18 27 The movement of the connecting rod 18 27 ...

Page 23: ...ever 15 9 torque shaft 15 8 3 and operating rod 16 9 The kinetic energy at the end of the opening cycle will thereby be absorbed by opening damper 18 15 Opening damper 18 15 simultaneously serves as an end stop for the opening cycle 3 6 4 Operating Sequence In the closed position of the circuit breaker the opening and closing spring are in charged state This means the circuit breaker is in a posit...

Page 24: ...8 1 and gears 18 2 The free wheel 18 3 engages in the cam of the charging shaft 18 14 Fig 8 and rotates it as far as the upper dead centre point The charging shaft 18 14 is then turned as far as the closing latch 18 17 more quickly by the effect of the partly relaxed closing spring 18 4 than by the freewheel i e the form fit between the free wheel of the charging gear and the charging shaft is can...

Page 25: ... Operating lever 18 27 Connecting rod for opening spring 18 27 1 Driving rod 18 31 Mechanical closing interlock 18 4 Closing spring 18 4 1 Spring washer 18 41 Damper for closing 18 41 1 Roller 18 6 Cam disc 18 7 Lever 18 7 1 Roller 18 8 Release OPEN 18 9 Opening latch 18 9 1 Supporting latch 18 9 2 Support lever 22 Interrupter unit Fig 7 Function diagram of closing and opening latching OPEN positi...

Page 26: ...Cam 18 3 Free wheel Fig 8 Function of the free wheel Charging of the closing spring 18 4 1000810a 18 14 Charging shaft 18 17 Closing latch 18 23 Roller 18 31 Mechanical closing interlock 18 4 Closing spring 18 6 Cam disc Fig 9 Function diagram of closing and opening latching OPEN position closing spring charged ...

Page 27: ... 7 2 Closing Actuating CLOSE tripping coil 18 16 releases cam disk 18 6 via CLOSE latch 18 17 and supporting lever 18 17 1 Fig 11 18 16 18 17 1 18 23 18 17 18 6 1000813a 18 16 Release CLOSE 18 17 Closing latch 18 17 1 Support lever 18 23 Roller 18 6 Cam disc Fig 11 Function diagram of closing and opening latching Disenagement of the closing latch ...

Page 28: ...to the operating shaft 18 22 and the operating mechanism rod 18 27 1 to the interrupter unit 22 The contacts of the interrupter unit 22 are closed 18 11 Opening spring 18 14 Charging shaft 18 22 Operating shaft 18 24 Operating lever 18 27 Connecting rod for opening spring 18 27 1 Driving rod 18 6 Cam disc 18 7 Lever 18 7 1 Roller 18 9 Opening latch 18 9 1 Supporting latch 22 Interrupter unit Fig 1...

Page 29: ...atch lever 18 9 1 Fig 12 At the end of the curve the lever 18 7 overtravels with the result that the opening latch 18 9 can drop behind the roller of the latch lever 18 9 1 Fig 13 18 19 Cam 18 41 Damper for closing 18 41 1 Roller 18 6 Cam disc 18 7 Lever 18 7 1 Roller 18 9 Opening latch 18 9 1 Supporting latch Fig 13 Function diagram of closing and opening latching Overtravel of the lever ...

Page 30: ...ng of charging shaft 18 14 Fig 15 After leaving the cam disc 18 6 the lever 18 7 turns back a little towards OPEN until the opening latch 18 9 is resting on the roller of the supporting latch 18 9 1 Fig 14 The circuit breaker is now latched in the CLOSED position 18 19 Cam 18 41 1 Roller 18 6 Cam disc 18 7 Lever 18 9 Opening latch 18 9 1 Supporting latch Fig 14 Function diagram of closing and open...

Page 31: ...s switched on The charging of the closing spring is repeated according to paragraph 3 7 1 Charging the Closing Spring Subsequently the charging shaft must be latched to top dead centre with the charged closing spring Fig 15 Mechanical closing lock out 18 31 prevents unintentional starting of the operating mechanism before the opening cycle by blocking supporting lever 18 17 1 see Fig 15 The closin...

Page 32: ...ted to the OPEN position over operating mechanism rod 18 27 1 At the end of the opening movement the kinetic energy is absorbed by the damper for opening 18 15 The damper serves also as end stop 18 11 Opening spring 18 15 Damper for opening 18 24 Operating lever 18 27 Connecting rod for opening spring 18 27 1 Driving rod 18 7 Lever 18 8 Release OPEN 18 9 Opening latch 18 9 1 Supporting latch 18 9 ...

Page 33: ...rol system This diagram contains the following documents Location diagram Schematic diagram Extended equipment diagram with technical data and list of equipment Terminal diagram Connector diagram Fig 17 shows the inside of the control cubicle R 1001369a K Contactors time relays P Operating cycle counter R Heating preventing condensation formation S4 Confirmation X1 Terminal blocks 12 1 1 Equipment...

Page 34: ...r 3 6 Spring Drive Mechanism of the Circuit Breaker a Spring is charged b Spring is not charged 18 1 Motor 18 11 Opening spring 18 16 Release CLOSE 18 20 Motor limit switch 18 4 Closing spring 18 8 Release OPEN Fig 18 Spring drive mechanism 3 8 2 Gas Monitoring Each pole column is a closed gas compartment Fig 19 and is gas monitored individually The gas compartment of a pole column to be monitored...

Page 35: ...ensity monitor B4 Fig 21 The SF6 filling and response values for the density monitor can be found in section 3 1 6 Arc Quenching Medium SF6 The connection W1 Fig 20 for filling the pole column with SF6 gas is in the relevant operating mechanism unit next to the pressure gauge The test connection W2 is located in the base at the side of the operating mechanism cubicle Fig 21 34 1001304a W1 Filling ...

Page 36: ...osed inside the monitor Both gases are exposed to the same ambient temperature The density comparison is replaced by a pressure comparison in both systems gas compartment reference compartment The density monitor responds to a change in pressure as a result of a leak between circuit breaker gas compartment and atmosphere Pressure changes as a result of temperature changes are not taken into accoun...

Page 37: ...umping device of the circuit breaker pole ensures that it is not repeatedly opened and closed in the event of simultaneous CLOSE and OPEN commands The swich S4 is for acknowledgement of enforced triple pole operation 3 8 4 Motor Control The motor charges the closing spring and is controlled by a limit switch 3 8 5 Anti Condensation Heaters To protect sensitive components in the operating mechanism...

Page 38: ...Additional free auxiliary switch contacts at the terminal fixture X1 are available for customer s purposes 3 8 8 Operating Cycle Counter The circuit breaker is equipped with one counter per pole Fig 17 It counts the number of switching operations performed ...

Page 39: ...unit of a high voltage circuit breaker and serves for indirect determination of the switching time inherent switching time The reference contact is tripped by the operating mechanism of the circuit breaker The difference in time between switching the interrupter unit and the output signal of the reference contact is recorded in the test document There is no direct mechanical connection with the ci...

Page 40: ... The IK 3 is designed as a two wire system in which the output signal is transmitted by a current loop 3 1 Sensor electronics 2 Sensor HE 6103 3 Magnet HE 6104 4 Fastening plate Fig 25 Reference contact The reference contact is set at the factory The air gap between the sensor and the magnet must be 2 4 mm 39 ...

Page 41: ...chgear the user must ensure that a responsible person if necessary authorized to supervise is put in charge of performance of commissioning only qualified and instructed personnel are assigned the regulations and instructions for work safety e g in the use of equipment together with instructions on action to be taken in the event of accidents and fire are available at all times and if necessary di...

Page 42: ...equences if the rules specified are not complied with They are expressed more exactly in the operating instructions WARNING Hazardous voltage Electric shock and burning as a result of arcing are possible if live parts are approached If high voltage is present in the vicinity at the place where work is to be done a responsible person from the power supply utility must before work starts Switch off ...

Page 43: ...uffocation Use a service unit for all work with SF6 gas Extract the SF6 filling do not let it escape into the air WARNING Improperly performed installation and maintenance can result in danger and malfunctions In the context of installation and commissioning the commissioning report must be filled out ...

Page 44: ...2 Checking on Arrival When a shipment arrives it should be checked immediately against the dispatch notes and check list If it shows signs of damage determine the extent of the damage and its probable cause without delay Should the damage have been caused in transport call in a representative of the forwarding agent in order to record the facts This is an essential requirement if a claim for damag...

Page 45: ...l surfaces treated with Tectyl 506 should be given a thick second coating Before storing the accessory items check their plastic wrapping for signs of damage If the plastic foil has sus tained damage unpack the parts and store them in a dry ventilated room ...

Page 46: ...d with anticorrosion agent Tectyl 506 sealing rings Cleaning liquids Cold application cleaning agent hydrocarbon basis free from halogenated hydrocarbons flash point 55 C e g Shellsol D60 Shell Es sovarsol 60 Esso Aral 4005 Aral Haku 1025 920 Kluthe Instructions Wipe off with a damp lint free paper or cloth Avoid drips Wipe clean with a dry lint free paper or cloth Immerse small parts if necessary...

Page 47: ...rand of lubricant is specified Isoflex Topas L32 for radial sealing rings and rolling contact bearings of the SF6 shaft seal on the corner gear and on the operating mechanism Shell Vaseline 8420 for sealing rings and terminal faces for high voltage cables WD40 or Trost Multifunction Fluid for flange faces inside the sealing rings including the slots Tectyl 506 for flange faces outside the sealing ...

Page 48: ...anized bolts with Molykote Longterm 2 plus Attention Unchecked tightening can result in damage to or loosening of bolt joints Use torque wrench for assembly Tightening torque see Table 11 Bolts are of 8 8 grade or higher i e Minimum tensile strength 800 N mm2 Minimum yield strength ReH 640 N mm2 Screwed joint Tightening torque M6 8 1 Nm M8 20 2 Nm M10 40 4 Nm M12 70 7 Nm M16 170 20 Nm M20 340 30 N...

Page 49: ...in the assembly of the circuit breaker A crane with suitable suspension tackle Evacuating equipment P 20 mbar SF6 filling device W423 SF6 leak detector A conventional standard toolbox 4 5 2 Assembly on Supporting Pillars at the Place of Installation The circuit breaker must be assembled at the point of installation The following sequence of steps must thereby be observed WARNING Failure to observe...

Page 50: ...isassembling the Insulator Column Kit Loosen the M16 nuts at the fixing point between the bracket 1 3 and the wooden beams 1 6 Lift the three insulator columns in the kit with the crane and put them down onto the brackets 1 3 on a solid base but do not disconnect the suspension tackle fom the insulator column kit 49 ...

Page 51: ...he connecting plates or a wooden base rest on the metal flange not on the porcelain parts Fig 28 Separating the insulator columns 4 5 4 1 Fixing the Reinforcing Sheets To fit the reinforcing sheets 1 and 2 in the breaker base replace the four M 16x80 screws shown in Fig 29 and the three M16x55 screws on all three pole columns with the seven M16x10 screws supplied in the accessory pack Note When re...

Page 52: ...4 Installation BM 16x55 BM 16x55 BM 16x55 B The M16x55 screw is not replaced Fig 29 Screw distribution for insulator column assembly The screws are then tightened to 170 Nm 51 ...

Page 53: ...e hook into the lifting eye bolts of the control cubicle and undo screw joints to the other components of the transport unit Move control cubicle with a crane and bolt in front to the centre pillar pole B 4 bolts M 16x60 4 nuts 8 washers from the accessories pack The length of the bolts from the accessories pack is suitable for a pillar wall thickness of up to 35 mm Fig 31 ...

Page 54: ...o poles must be strictly observed because of the coded pole connecting cables To assemble the drive cabinet insert the crane hooks into the lifting eye bolts of the drive cabinet and undo the screwed connections to the other components of the transport unit Place the operating mechanism cabinet with base 11 onto flange plate F of the corresponding pillar and secure with screws 4 screws M 16x80 4 n...

Page 55: ...e sure the double interrupter heads and insulator columns are assigned correctly to the circuit breaker poles and check the last four digits in the serial number on the lower part of the circuit breaker when you install the circuit breaker The insulator columns consisting of corner gears insulators and operating rods are fully assembled at the factory The top openings on the insulator columns are ...

Page 56: ...he open insulator column should be protected against atmospheric influences using suitable covers Remove the bolt 10 9 Fig 49 from the corner gear 15 and the lever 15 9 and keep them ready for linking the operating rod Remove the transport fastenings cable ties for the operating rod 18 27 1 Fig 49 Installing the insulator columns The insulator columns for the circuit breaker are identical Use the ...

Page 57: ... under the corner gear This will prevent damage when turning Now lift the insulator column carefully by the 2 angled lifting eye bolts 1 8 Make sure that the crane hook and the insulator column head are always vertical to prevent the insulating columns slipping when lifted The connecting plate 1 4 can then be loosened and removed You can remove the lower connecting plate once the insulator column ...

Page 58: ...m Tighten the four M8x40 screws and nuts with a torque of20Nm 16 7 15 16 3 1002226a Fl Humidity indicator N Groove for teflon strip 16 6 1 VD Packaging cap 1 Transport protection device 15 16 3 Desiccant agent 16 Post insulator 16 7 Sealing ring 16 9 Operating rod 1 8 Lifting eye bolt 2 Cable fastener Fig 38 Packaging cap for insulator column 57 ...

Page 59: ...tor on the inside of the cover immediately Handling the humidity indicator The effectiveness of the drying agent can be determined using the humidity indicator In its initial state dry the indicator display is blue If the relative humidity increases the indicator display changes from blue to pink When taking the reading check which semicircle is the most pink or is already lighter than the area ar...

Page 60: ...mage may lead to leaking joints 59 A Grease with corrosion protection agent WD 40 or Trost multifunction oil B Grease with Tectyl 506 C Grease sealing rings with Vaseline 8420 Fig 40 Treatment of the sealing flanges and the guide The flange for the insulator column should also be cleaned and treated with Tectyl Take two new O rings from the accessory kit clean with lint free cloth lubricate with V...

Page 61: ...e same time the guide 16 6 can be pushed over the slide ring with the other hand see Fig 46 Note When inserting the guide ensure that the longer section of the guide is at the bottom By turning it slightly in all directions ensure that the lower O ring is positioned centrically in the groove 16 3 16 9 1 1002573a 16 3 Post insulator 16 6 Centering guide 16 6 1 Teflon strip 16 7 Sealing ring 16 9 Op...

Page 62: ...ling ring 16 9 1 Yoke head Fig 42 Install spacer Lift double interrupter head to eye level with crane on the lifting plates Fig 47 1 Lifting plate Fig 43 Lifting plate arrangement Attention The double interupter head must be suspended horizontally for assembly ...

Page 63: ...ch a way that the grading capacitors are situated on the side of the operating mechanism cabinet The holes in the fork head of the drive rod and in the two coupling levers should be aligned to enable the coupling bolt to be inserted To do this the two coupling levers are held in a V shape with one hand while the coupling bolt is inserted into the aligned holes with the other hand after positioning...

Page 64: ...4 Installation W350 Spacer 16 6 Centering guide 16 7 Sealing ring 21 11 SL Safety clip 21 7 Coupling lever 21 7 3 Coupling bolt Fig 45 Erecting the double break assembly 63 ...

Page 65: ...o this unscrew the nuts and unscrew the threaded bolt downwards out of the hexagonal socket Remove the hexagonal socket to the side Before the double interrupter head is lowered release the reversing lever 15 9 from its locked position remove the rubber retaining ring and bolt 10 9 Carefully lower the double interrupter head onto the insulator and screw it onto the insulator column to 170 Nm with ...

Page 66: ... Coupling the Operating Mechanism Using the manual actuator supplied the lever 15 9 is moved in such a way that it can be connected to the bolt 10 9 The bolt remains in operating position W387 Manual operating device W387 15 9 Lever 18 27 1 Driving rod Fig 48 Manual operating device W387 65 ...

Page 67: ...al screws after removal of the lifting eye bolts Next pull the bolt 10 9 out at all three poles Fig 49 so that it can be secured in the ring groove with the locking plate 10 1 and two M6 screws Bend the locking plate after tightening the two M6 screws 4 5 11 Connecting the Gas Pipes During assembly of the tube connections ensure that the sealing surfaces are clean and the O ring gasket is in perfe...

Page 68: ... locking nuts 51 1 1 by hand and tighten with a wrench Screw on the locking nuts 15 40 4 to a tightening torque of 40 Nm Vaseline and a new O ring are to be found in the accessory pack Keep the locking screws of the gas pipes and the union nuts with sealing caps of the flanges on the pole columns in a safe place for future transportation and repairs 15 Corner gear 15 40 Flange 15 40 1 Union nut 15...

Page 69: ...ety reasons work on high voltage terminals should be carried out before the circuit breaker is filled with SF6 gas up to nominal pressure The connection of the high voltage conductors is allowed at nominal SF6 pressure provided that the warnings are followed WARNING High gas pressure Danger of bursting The porcelain insulators should not be exposed to any stress e g from vibration etc Great care s...

Page 70: ...nnections and tighten the screws Before commissioning retighten once again In the case of connecting parts made of copper copper aluminium spacers must be used 4 6 3 Connecting the Leads WARNING To avoid damaging the circuit breaker by inadvertent operation switch on the power to the motor only when the circuit breaker has been filled with SF6 gas Pressure must at least be at the level of general ...

Page 71: ...e required filling pressure and response values are temperature dependent and must be taken from the diagram SF6 filling curve and response values of the density monitor see 3 1 6 Arc Quenching Medium SF6 4 7 2 Filling the Breaker from the Gas Cylinder Siemens offers a complete filling device of type W423 for filling the circuit breaker with SF6 gas from a gas cylinder Fig 53 Attention The circuit...

Page 72: ...n impermissibly high pressure Fig 53 Gas filling device W423 To pour in gas connect the hose of the filling device to the filling flange W1 of the pole Fig 54 and Fig 55 Using the handwheel on the control valve regulate the gas flow to prevent possible freezing of the cylinder Monitor the filling process on the precision pressure gauge Care must be taken that the filling pressure which depends on ...

Page 73: ...the hose of the filling device and close the filling flange Screw on the union nut by hand 4 Nm Ensure that all parts are clean 4 7 3 Leakage Test after Installation After successful assembly of the circuit breaker and filling with SF6 gas the tube connections should be checked for leakages A leak detector must be used If a leak is detected WARNING Release the SF6 pressure before working on the sc...

Page 74: ...n charged and latched The operating mechanism is now ready for a closing operation WARNING Blocking of the circuit breaker is possible Before the start of a test run it is essential to check that the bolts 10 9 are inserted in the breaker position 2 and secured Fig 56 A Operation position B Marking position 10 9 Bolt 15 9 Lever Fig 56 Coupling point on corner gear WARNING Danger of bursting if por...

Page 75: ...st be at the level of general lockout SF6 see Table 4 When installation work is finished 5 test switching operations should be carried out per circuit breaker pole With regard to the possibility of the porcelain components having suffered transport damage these mechanical switching operations must be performed by remote control as safety switching operations 74 ...

Page 76: ...trol cubicle are working and also the function of any monitoring equipment fitted 4 9 2 Test of Wiring between Substation and Circuit Breaker Check all command and signalling paths 4 9 3 Commissioning Report It should be checked that the commissioning report enclosed with the circuit breaker has been completed in full and signed Please return it to the manufacturer at the following address Siemens...

Page 77: ...F6 Pressure The pressure of the SF6 gas in the pole columns is monitored by a density monitor and shown on the respective pressure gauge The response values of the density monitor are shown see 3 1 6 Arc Quenching Medium SF6 If the SF6 pressure drops unduly low a signal Loss of SF6 is initiated The circuit breaker must then be topped up as soon as possible with SF6 from a gas cylinder or using the...

Page 78: ...uld be notified 5 1 3 General Lockout If the SF6 pressure in the circuit breaker drops so low that perfect arc quenching can no longer be ensured a general lockout becomes effective and blocks all further operation 5 1 4 Mechanical Reclosing Lockout If the circuit breaker pole is in the CLOSED position a mechanical reclosing lock out in the operating mechanism comes into effect It prevents the ope...

Page 79: ...nterruptions as a function of the breaking current The chart Fig 57 relates to one pole of a triple pole circuit breaker Three times the number of the permissible single pole opening operations may thus result in a triple pole circuit breaker e g 18 single pole opening operations with 50 kA Weighting factor k simplifies calculation of the max permissible number of interruptions at different breaki...

Page 80: ...ill permissible with a given number of operations with consequent wear already carried out can be calculated using the above equation For example The circuit breaker with a rated short circuit breaking current of 50 kA has performed 250 interruptions with breaking currents of 3 15 kA and 2 interruptions 20 kA How many interruptions at 40 kA are still permissible n40 10 7 6000 250 200 520 6000 n3 1...

Page 81: ...se please telephone during business hours Tel 91 240 2565 142 or by fax 91 240 2554 701 WARNING To avoid any hazard only qualified personnel may do the work described below WARNING Work may only be done on the operating mechanism when the opening and closing spring are relaxed WARNING The circuit breaker must be switched off and earthed for SF6 filling work The circuit breaker can be switched back...

Page 82: ...slow SF6 leak Locate fault and seal leak Top up SF6 to nominal pressure General SF6 lock out No switching possible SF6 leak See Loss of SF6 Reclosing lockout longer than 15s Closing spring not charged no closing possible No motor power supply Motor defective Provide motor supply replace motor Table 12 Disturbances ...

Page 83: ...ed This should be done in accordance with current official regulations at the time of disposal No oils used in the circuit breaker contain PCB In as supplied by Siemens state the device incorporates no hazardous substances in the sense of the pertinent regulations in Germany If the device ist to be operated outside Germany the locally applicable laws and regulations must be followed The insulating...

Page 84: ...t it be necessary to bring forward the corresponding service because the permissible number of mechanical operations and or load or fault switching operations have already been exceeded see section 5 1 5 Max Permissible Number of Interruptions 6 1 2 Assignment of Personnel The inspection and maintenance service may only be carried out by or under the supervision of qualified per sonnel This person...

Page 85: ...sturbance as accurately as possible Please name any that are showing signs of damage To simplify identification state the designations given in the operating instructions designations and part numbers together with the order number of the operating instructions 927 00966 174 A page number number of the illustration and state the serial number of the circuit breaker concerned 6 1 6 Points to be Not...

Page 86: ...r work safety e g in the use of equipment together with instructions on action to be taken in the event of accidents and fire are available at all times and if necessary displayed in the place of work the tools equipment and apparatus required for work safety and the personal protective equipment required for certain tasks are available only those materials lubricants and auxiliary equipment appro...

Page 87: ...will be automatically recharged after a closing operation The spring state indicator shows only the position of the closing spring unintentional switching operations can lead to severe personal injury Before beginning maintenance work relax the opening and closing springs as follows Disconnect motor power supply open the circuit breaker if the circuit breaker is in the CLOSED position close the ci...

Page 88: ...bination with moisture switching dust is caustic and forms a coating that sticks fast Small quantities of gaseous decomposition products already initiate alarm signals e g pungent disagreeable smell similar to rotten eggs hydrogen sulphide before there is danger of suffocation If emptied housings are opened after correct pressure relief there is the possibility of contact with switching dust Do no...

Page 89: ...nd its decomposition products falling and or toppling parts and or moving parts The Safety rules listed in section 6 2 should be followed Check and maintenance service Due to time interval Due to wear Remarks Checks After 12 years after 3000 operating cycles I Inom Circuit breaker must be taken out of service and must be isolated Gas compartments need not be opened Maintenance After 25 years after...

Page 90: ...Lockout X X 6 4 11 3 Functional Check Anti Pumping Feature X X 6 4 11 4 Function Check of Enforced Triple Pole Operation Feature X X 6 4 12 Check of Motor Control X 6 4 13 Measuring the SF6 Gas Humidity Content X 6 4 14 Measuring the SF6 Air Content X X 6 4 15 Anti Corrosion Protection Table 14 Maintenance Schedule A Checks B Maintenance 6 Maintenance 6 4 Work to be Carried Out in Accordance with ...

Page 91: ... gas loss refill with SF6 If the measured value is more than 0 30 bar below the filling curve specified a leak test must be carried out and the leak must be repaired Then the filling must be corrected 6 4 2 Drawing Off the SF6 Gas It is recommended to draw off the SF6 gas with a service unit so that it can again be used almost completely for the subsequent filling The service unit has all the faci...

Page 92: ...ed in closed tins Check the closed tins for damage Filter material from leaky tins must not be used The filter material is accommodated in the filter cowl see 3 4 Interrupter Unit Remove cover 15 16 11 with O seal ring Fig 61 4xM10 screws Remove the old filter bags from the filter cowls Lay the new filter bags in the filter cowls Grease cover 15 16 11 Fig 62 with seal ring at the sealing surfaces ...

Page 93: ...e sealing rings with Vaseline 8420 15 Corner gear 15 16 11 Cover with O seal ring Fig 61 Treatment of the sealing flanges 15 11 Filter cowl 15 16 1 Sealing ring 15 16 11 Cover with O seal ring 15 16 3 Filter bag Fig 62 Inserting the filter 6 4 4 Evacuating and Filling the Circuit Breaker with Gas The circuit breaker may be filled only by or under the supervision of qualified personnel and in accor...

Page 94: ... gas is then taken directly from a gas cylinder via the SF6 filling device W423 Filling by using a service unit Connect the service unit at the filling connection W1 Fig 63 Evacuate the circuit breaker down to a pressure of 0 02 bar then switch the service unit for fill The required filling pressure and response values are temperature dependent and must be taken from the diagram SF6 filling curve ...

Page 95: ...W1 Fig 63 Slowly open the regulating valve Fig 65 at the pressure reducer with the vent valve closed to avoid any ice formation at the fitting Monitor the filling process at the precision pressure gauge 3 Care must be taken that the filling pressure which depends on the ambient temperature is correct For nominal filling pressure see diagram in section 3 1 Technical Data At an ambient temperature o...

Page 96: ...r A divergence greater than 0 30 bar must be noted at the circuit breaker pressure gauge handwritten on adhesive tape 6 4 6 Testing the Density Monitor 6 4 6 1 Check Function of Gas Density Monitor Undo sealing cap on test connection W2 the gas compartment and density monitor are separated by a nonreturn valve and check whether the density monitor contacts respond 6 4 6 2 Check of the Operating Va...

Page 97: ...1 6 Arc Quenching Medium SF6 6 4 7 Check for Leaks on Operational Circuit Breaker The rated pressure of the SF6 gas can be found in the table in the section 3 1 6 Arc Quenching Medium SF6 When the filling of the circuit breaker is completed all new connections must be checked for leaks This can occur with a leak detector or leak detecting spray e g from Wobst If neither is available leaks can also...

Page 98: ...18 10 18 22 18 10 Coupling rod for auxiliary switch 18 22 Auxiliary switch Fig 67 Auxiliary switch Should leads be disconnected from the auxiliary switch contact press the spring shackle at the AMP connector to release With AMP connectors with insulation casing release is automatic when the sleeves are pulled Fig 68 1 Insulation sleeve 2 Spring shackle 3 Direction of pull Fig 68 AMP connector ...

Page 99: ...ind any reddish oil traces at the specified positions Fig 69 inform the Siemens representative responsible and ask for expert assistence 18 15 Damper for opening 18 41 Damper for closing Fig 69 Check the dampers 6 4 8 3 Check Trip Coil and Latching Blocks Check firm connection of the trip plate cheese head screws M6x40 tightening torque 8 1 Nm and the latching blocks cheese head screws M 10x70 tig...

Page 100: ...al Check Trip Circuits Check the tripping action of the circuit breaker via all the existing tripping paths 6 4 11 2 Functional Check Lock Out 6 4 11 2 1 Functional Check Reclosing Lock Out During the process of charging the closing spring the effectiveness of the reclosing lock out must be checked by means of an electrical CLOSE command The tripping coil must not operate Perform this check at all...

Page 101: ... charging process of the closing spring the motor is deactivated via a limit switch Perform this check at all poles 6 4 13 Measuring the SF6 Gas Humidity Content Before putting the breaker into operation the humidity of the SF6 gas must be checked For this a commercially available dew point measuring instrument with C scale can be used The maximum permissible dew point temperatures at operating pr...

Page 102: ...ker for damage Defective parts must be derusted provided with a priming coat and varnished 6 4 16 Special Occurrences Check whether since the last instance of maintenance any special occurrences e g incorrect opening and closing of the circuit breaker loss of SF6 gas etc have been documented ...

Page 103: ...rating plate Bar Rated voltage KV Rated normal current A Rated short circuit breaking current KA Rated control voltage V Rated signalling voltage V Rated voltage circuit breaker charging motor V Rated current Charging motor of the circuit breaker A Circuit diagram no lndex Circuit breaker Order number of the operating instruction index Switching duty Overhead line Transformer Generator Cable Coupl...

Page 104: ...ng mechanism Control Transport damage notified Check SF6 transport filling only 3AP1 Installation OK In accordance with operating instructions in chapter Installation If commissioning is not performed immediately the items listed below must be checked Pole A Pole B Pole C OK Electrical circuit for charging motor is interrupted at a suitable point Anti condensation heaters connected Evacuation min ...

Page 105: ...ure bar C 5 CLOSED OPEN safety switching operations by remote control 60 m safety distance Attention On three phase A C motors the rotary field direction must be taken into account when connecting the motor voltage Function tests ace to breaker circuit diagrams OPEN CLOSE switching operations lockouts signals anti pumping etc All details checked against circuit breaker circuit diagram and system c...

Page 106: ...105 Monitoring SF6 Pole A Pole B Pole C Unit Control Density monitor serial number Loss of SF6 bar C 1 General lockout SF6 bar C 2 General lockout SF6 bar C bar C bar C bar C ...

Page 107: ...of signal s Auto reclose interlocking 1 Auto reclose interlocking II Enforced triple pole operation feature 1 Signal Time delay of signal s Closing lockout 1 Enforced triple pole operation feature 2 Signal Time delay of signal s Closing lockout 2 Anti pumping device 1 Anti pumping device 2 Circuit breaker tripping Indication of circuit breaker position Relays contactors in local control panel for ...

Page 108: ...tch Damping Automatic TRIP Synchronization of the circuit breaker poles Motor run time monitoring Signal Time delay of signal min Operating hours counter Socket and lighting Switch remote local control The stated functional tests were performed up to the control panel in the circuit breaker control cabinet local control cabinet or control room ...

Page 109: ...onnected to main terminal Operations counter reading after completion of work Damage to paintwork repaired and newly fitted screws painted 1 Maximum permissible dew point during commissioning 10 C 14 F 2 Measurements not required if gas filled from a new cylinder Remarks Remarks Please complete and return to Siemens Ltd PTD H 3 Circuit Breaker E 76 Waluj MIDC Aurangabad 431136 India Fax 91 240 255...

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Siemens 3AP2-FI, Operation & Maintenance Manual

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