Siemens 15-GMl-1000 Instruction Download Page 1

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Summary of Contents for 15-GMl-1000

Page 1: ...SIEMENS 5kVand 15kV Vacuum Circuit Breakers TypeGMI Instruction Installation Operation Maintenance SGIM 3268E Courtesy of NationalSwitchgear com ...

Page 2: ...t and the hazards involved In addition this person has the following qualifications a is trained and authorized to de energize clear ground and tag circuits and equipment in accordance with established safety practices b is trained in the proper care and use of protective equipment such as rubber gloves hard hat safety glasses or face shields flash clothing etc in accordance with established safet...

Page 3: ...ng Interlock Circuit Breaker Frame Ground Disconnect Circuit Breaker Handling Wheeis Racking Mechanism Maintenance Introduction and Maintenance Intervals Recommended Hand Toois Recommended Maintenance and Lubrication Removal from Switchgear Checks of the Primary Power Path Cleanliness Check Inspection of Primary Disconnects Checks of the Stored Energy Operator Mechanism Maintenance and Lubr cation...

Page 4: ...ng in the proper care and use of protective equipment such as rubber gloves hard hat safety glasses face shields flash clothing etc in accordance with established safety procedures Training 1n rendering first aid 2 Signal Words The signal words Danger Warning and Caution used in this manual indicate the degree of hazard that may be encoun tered by the user These words are defined as Indicates an i...

Page 5: ... days to assure prompt resolution of claims 3 Each circuit breaker should be appropriately lifted to avoid crushing the side panels of the breaker or damaging the primary disconnect subassemblies Heavy Weight Can cause death serious injury or property damage Obtain the services of a qualified rigger prior to hoisting the circuit breaker to assure adequate safety margins 1n the hoisting equipment a...

Page 6: ...g asks in the order given Thisc1eckassi res hat both the tripping and clos lg springs are fully discharged Figure 1 Co ltrol Power Disconnects in Switchgear 4 A DANGER Hazardous voltages and high speed mechanical parts Wiil cause death severe personal Injury or property damage Read ir str iction manuals observe safety 1ns ruct1ors and use c ualif1ed persor rel 1 Press red Trip pus ibutto I 2 Press...

Page 7: ...on the racking screw on the front of the breaker cell and push in This action operates the racking interlock latch Figure 3 shows racking of a circuit breaker in the upper cell the process is similar for a breaker in the lower cell Rotate the racking crank counterclockwise until the breaker is in the Test posrtion If the circuit breaker is in the Disconnect position turn the racking crank clockwis...

Page 8: ...ear Installed on a Raised Pad Because the floor level in non walk in outdoor enclosures is approximately 6 inches above grade founda tion level the lower breaker in either a one high or two high sectior of switchgear must be removed using the preceding procedure for upper breaker removal The approved breaker lifting device should be used for re moval of both lower and u per breakers frory the exte...

Page 9: ...lace The plug jumper interconnects all control power and signal leads e g remote trip and close contacts between the switch gear and the circuit breaker 4 Energize close the control power circuit disconnect Fig ure 1 Figure 8 Split Plug Jumper Connected to Switchgear 5 Use the Close and Trip controls Figure 2 to first Close and then Open the circuit breaker contacts Verify contact positions visual...

Page 10: ...operating principle of the GMI vac ium interrupter is simple Figure 11 is a cutaway view of a typical vacuum interrupter The entire assembly is sealed after a vacuum is established The interrupter stationarycontactisconnected to the upper disconnect stud of the circuit breaker The inter rupter movable contact is conrected to the lower disconnect stud and driving 1echanism of the circuit breaker Th...

Page 11: ...ers The interprase barriers are r ot provided o i all circuit breaker ratings These four plates of glass polyester lsula ing material are attached to the circuit breaker and provide suit able electrical insulation between the vacuum interrupter pri mary circuits and the housing Stored Energy Operating Mechanism The stored energy operatir g mechanism of the GMI circuit breaker is an integraled arra...

Page 12: ...e 10 on TRIP SOLENOID 266 BANANA LINK 113 DRIVE CAM 20 CAM FOLLOWER 115 JACK SHAFT PLATE 0 TRIP SOLENOID ARMATURE n _j_ I__ TRIP T ACTUATOR 152 LATCH FACE TRIP SHAFT 79 ROLLER Figure 15a Breaker Open Closing Springs Charged Figure 16a shows the ratchet wheel 15 which is free to rotate about the main cam shaft 3 The ratchet wheel is driven by either the charging motor or the manual charge handle so...

Page 13: ...9 rotates cam follower 115 is displaced by drive cam 20 without motion of the jack shaft 217 Mechanical trip free operation is provided by manual tripping electrical tripping and or the mechanical interlocks Opening Mode Opening or tripping the vacuum interrupter contacts is accomplished by rotation of the trip shaft 79 Rotation may be produced either electrically by energizing the trip solenoid 2...

Page 14: ... The ratchet wheel is driven by 12 ion Main Link 120 0 0 0 0 00 0 _ Trip Solenoid Armature Trip Hatchet 99 Figure 15b Breaker Open Closing Springs Charged either the charging motor or the manual charge handle socket 52 When the springs are charged electrically the motor eccentric 100 introduces a rocking motion into the drive plate 13 As this plate rocks back and forth the lower pawl 24 1 which is...

Page 15: ...cal tripping and or the mechanical interlocks Opening Mode Opening or tripping the vacuum interrupter contacts is accomplished by rotation of the trip shaft 79 Rotation may be produced either electrically by energizing the trip solenoid 266 Figure 15b or manually by pressing the trip button Energizing the trip solenoid causes the upper arm of the trip actuator 152 to rotate counterclockwise Pressi...

Page 16: ...rtravel and rebound of the vacuum interrupters movable contacts during the conclusion of an opening operation The damper action affects only the end of an opening operation Figure 19 Closing and Opening Springs Spring Charging Motor and Damper 14 The cylindrical body of the damper is secured to the breaker frame with a yoke The damper s piston and striker tip protrude from the opposite end of this...

Page 17: ... the springs recharged and theclosing signal removed interrupted before the close solenoid can be energized the second time Wher the trip solenoid isenergized itallows rotation ofthe jack shaft by the tripping spring This rotation pulls the insulating push rods attached to the movable contacts of the three vacuur interrupters and the circuit breaker contacts are opened Electrical connections to th...

Page 18: ...cL it breaker is racked into the appropriate position i is de the switchgear the MOC sw tch operating arm passes a w ing protective cover pla e and engages the pa 1tograph linkage show 1 1 Figure 26 Operation of the c1rcu1t breaker causes t1e pantograph linkage to rar sfer mo or to the MOC swi ches loca ed above tre pantograor Fie a ard b cor tac1s car be Jsed 1 relaying and contro logic schemes A...

Page 19: ...electrical closing of the primary contacts and 3 electrical tripping of the primary contacts Figure 27 Circuit Breaker Limit Switches Automatic spring charging by charging motor occurs when secondary control power is available and motor cutoff switch LS1 has not operated The springs are automatically re charged after each closing opP rC1tion Electrical closing occurs with closing control power app...

Page 20: ... Aux Switch Closed when Br is Open 52Y Anti Pump Relay 52T Opening Solenoid Trip 52SRC Spring Release Solenoid 52X Reclosing Control Relay L___________ _J Spring Charging Motor Secondary Disconnect Control Switch Close Control Switch Trip Typical Red Indicating Lamp Remote Green Indicating Lamp Devices White Indicating Lamp Notes on Schematic Arrangement Schematics are shown with 1 Closing Springs...

Page 21: ...fixed l on a lug of the support bracket the torsional tension of the spring will cause the cylindrical assembly 5 to be forcibly rotated relative to the support bracket The cylindrical assembly is notched at the end nearest the mechanism side sheet with the notch engaging a spring pin 6 driven into the trip latch shaft The notch has sufficient arc width to permit the trip latch shaft to rotate nor...

Page 22: ...e a transfer truck or lifting truck for Figure 30 Breaker Interlocks and Ground Disconnect 20 handling of the breaker when all circuit breakers are located in the lower cells Once the circuit breaker is racked owt of the switchgear the unit can be p illed using the handles on the front of the breaker The breaker will roll on its bottom four wreels On indoor and Shelter Clad switchgear with circuit...

Page 23: ...ossible the for such actions in time to prevent malfUnCtiOnS during nnAr 1titi n Recommended Hand Tools Type GMI breakers use both standard American and metric fasteners Metric fasteners are used for the GMI vacuum interrupters American fasteners are used in all other locations This list of hand tools describes those normally used in disas sembly and re assembly procedures Metric Vacuum Interrupte...

Page 24: ...erosion check during the manual spring charging check of the opera tor sirce charging o the springs is necessary to place the contacts in the closed position Also the vacuum integrity check is usually performed in conjunction with the High Potential tests These instr ictions follow the recorrmendation that these tests contact erosion manual sprirg charging check and vacuum integrity high potential...

Page 25: ... or sliding surfaces with a l grt coat of syntretic grease or oil Lubricants composed of diester oils ar d lithium thickeners will be compatible Sheil draw11 cup needle bearil JQS Use either Beacor Exxon 325 reference 18 658 676 422 ar d part number 15 337 131 001 or Superrnil Amoco A 72832 refere lce 18 758 676 423 or Anderol 732 Pivots slidirg ar d or rolling sur aces and gererat lubrication Use...

Page 26: ...ol Checks The electrical controls of the GMI circuit breaker should be checked during inspections to verify absence of any mechani cal damage and proper operation of the automatic spring charging and Close and Trip circuits Unless otherwise noted all of these tests are performed without any control power applied to the circuit breaker Check of the Wiring and Terminals 1 Physically check all of the...

Page 27: ...be produced when a high voltage is placed across two circuit elements in a vacuum Keep personnel more than six 6 feet away from a circuit breaker under test Potential Test Voltages The voltages for high potential tests are shown in Table 3 Table 3 High Potential Test Voltages 4 76kV 8 25kV 15 0kv Max AC RMS 14kV 27kV 27kV Max DC Avg 20kV 38kV 38kV Note Do not use DC high potential testers inc rocm...

Page 28: ...e Spring Discharge Check on the circuit breaker after all control power is removed The Spring Discharge Check consists of 1 depressing the red Trip pushbutton 2 then depressing the black Close pushbutton and 3 again depressing the red Trip pushbutton All of these controls are on the breaker front panel Visually verify the Discharge condition of the springs 2 Remove any interphase and outer phase b...

Page 29: ...s the use of a 3 4 inch socket wrench to relieve spring tension on the closing springs The top cover of the breaker has openings providing access to the tensioning bolts Turning the left and right hand support bolts counterclockwise relieves spring tension For early models of the GMI breaker once tension has been relieved retaining ring pliers are needed to remove the top and bottom retaining ring...

Page 30: ... and its key mounting components Two mounting screws hold the switch to the mounting bracket First remove the quick disconnect terminals after marking their position The screw washers and nut connecting the switch s operating lever to the operating shaft is removed and then the two mounting screws Re assemble in reverse order Figure 40 Replacement of Closing Solenoid 28 Replacement of Motor Cut Of...

Page 31: ...rip shaft actuator Confirm that the switch is vertically aligned to ensure that it will not be struck by the closing hatchet or the trip shaft actuator Replacement of LS3 Up to Mid 1991 The following paragraphs describe replacement of the trip latch reset switch for the mechanism used beginning in ap proximately mid 1991 21696 93 Figure 42 Motor Cut Off Switch LS1 and Spring Charged Switch LS2 Thi...

Page 32: ...ed security the jam nut is treated with a thread locking adhesive Loctite 271 with Loctite type T primer and then torqued to a value of 17 20 ft lbs Check all associated parts damper body and telescoping tube for wear Replace as necessary The telescoping tube and internal striker block employ slugs in variable thicknesses and quantity to control movable contact motion If the telescoping tube is re...

Page 33: ...ench is required 4 Disconnect insulating pushrod at bell cranks Remove and discard two 0 25 X washers Spread the bell crank ele ments and allow the push rod to drop down 5 Refer to Figure 51 and using the procedure shown to secure head and nut proceed to loosen the bolts which fasten the flexible shunt clamp to the movable contact of the tube 6 Remove the two X washers discard fastening the bell c...

Page 34: ...ertion and adiustment the clamp may then be tightened 14 Stationary Contact Assembly 32 14 1 VS12015 and VS25002 Interrupters Align copper spacer bar with large hole in stab support Insert long M12 bolt through lockwasher washer stab support and copper spacer Align tube stationary contact and by hand engage the M12 bolt Figure 48 Note Stationary contact is annealed copper Thread damage wi I occur ...

Page 35: ...require a spacer 15 5 Having determined the required number of washers insert hex bolt through lockwasher trunnion spacer and shim washers Engage bolt into the vacuum tube stem and tighten by hand to snugness Engage trunnion to bell crank both sides and tighten hex bolt further until lockwasher is just collapsed 15 6 Manually exercise bell cranks opening tube approxi mately 1 4 to 3 8 of an inch R...

Page 36: ...que Wrench 50 ft lbs Hex Socket Keys 5 16 0 156 socket type preferred Miscellaneous Pliers Hot Air Gun Loctite Threadlocker 262 Loctite Primer T Allen Wrenches 8mm 10mm Table 7 Critical Fasteners and Torque Limits I i I I _ __ i 46 GMI Breaker Side Elevation Typical 47 VS10006 and VS10028 1200 Amp Tube Family I Stationary Contact Movable Contact Tube Clamp Size Size Torque Size All Current Ratings...

Page 37: ...PLATE FLEXIBLE Sl l JNT Cl AMP 49 VS10028 2000 and 3000 Amp INSULATING CENTERING BLOCKS STAB SUPPORT Figure 50 VS10006 2000 Amp 51 Tube Clamp Fastening Procedure SPACER SPECIF F O FOR 8REAKEF 6mm VSl20151 Smm VSl0028 12 l Imm VS OOOt j I OPEN ADJUSTMENT CLOSE AO JUSTMEN1 i G GAGING DlM NSlQN TRUNNION CENTER 375 SHAFT RAOIUS 250 STROKE ti 52 Gaging Procedure and Stroke Adjustments 35 Courtesy of Na...

Page 38: ...eration of manual charging and manual closing and tripping Lubrication 1 Evidence of excessive wear 2 Lubrication of wear points I Electrical Controls Wiring 1 Mechanical damage or abrasion Terminals and Connectors 1 Tightness and absence of mechanical damage Close and Trip Solenoids Anti Pump 1 Automatic charging Relay Auxiliary Switches Secondary Disconnect 2 Close and trip with control power Sp...

Page 39: ...ircuit de fails to energize No sound of energized or control circuit fuses breaker closing blown Correct as indicated 2 No closing signal to secondary disconnect pin 13 Check for continuity and correct relay logic 3 Secondary disconnect contacts 13 or 15 are not engaging Check and correct as required 4 Failure of anti pump relay 52Y contacts 21 22 or 31 32 or 13 14 Check and replace as required 5 ...

Page 40: ... energized or control power fuses are blown Correct as indicated 2 Damage to wiring terminals or connectors Check and repair as necessary 3 No tripping signal to secondary disconnect contact 1 Check for continuity and correct relay logic 4 Secondary disconnect contacts 1 or 2 are not engaging Check and replace if required 5 Failure of trip coil 52T Check and replace if necessary 6 Auxiliary switch...

Page 41: ...cuit Current I Current kA rms I kA Crest i CD I i i 58 78 I 97 132 78 132 66 111 37 sa0 62 CD 58 77 97 77 130 3 K is the ratio of rated maximum voltage to the lower limit of the range of operating voltage in which the required symmetrical and asymmetrical interrupting capabilities vary in inverse proportion to the operating voltage 4 3000 ampere units available with increased fan cooled rating of ...

Page 42: ...o mid 1993 current is 23A Table A 3 Interrupting Capacity Auxiliary Switch Contacts Continuous Current Control Circuit Voltage Type Auxiliary Switch Amperes I 120VAC 240VAC 48VDC 12s voe 250VDC Non Inductive Circuit Interrupting Capacity in AMperes Breaker Auxiliary Switch 20 20 20 I 20 10 2 TOC Auxiliary Switch 15 15 10 I 0 5 0 5 0 2 MOC Auxiliary Switch 20 15 10 10 10 5 Inductive Circuit Interru...

Page 43: ...Courtesy of NationalSwitchgear com ...

Page 44: ...n U S A Siemens Power Transmission Distribution Inc 7000 Siemens Road Wendell NC 27591 P O Box 29503 Raleigh NC 27626 0503 1995 Siemens Power Transmission Distribution Inc SIEMENS is a registered trademark of Siemens AG Courtesy of NationalSwitchgear com ...

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