Siemens-Allis LA-3200A Instructions Manual Download | Manualshive

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Summary of Contents for LA-3200A

Page 1: ... SIEMENS ALLIS Switchgear INSTRUCTIONS TYPES LA 3200A LA 4000A AND LA 40008 UNFUSED AIR CIRCUIT BREAKERS WITH MANUAL OR ELECTRICAL OPERATORS 18X5689 01 September 1979 Courtesy of NationalSwitchgear com ...

Page 2: ... Motor Cu roff Swi tch Secondary D isc Opt io n Auxiliary Swi tch Option Shunt Trip Option TRIPPI N G TRANSFORMERS Current Sensors Tripping Transformer Table Bell A larm Swi tch Option Static Trip Option LimiT rip Undervol tage Trip Device Option L ubricati ng In structions Instructi on Book Ref Fig 6 T y p ical Panel Assembly Fig 7 Secondary Disconnect Fig 8 Auxiliary Swi tch Fig 9 Shunt T r ip F...

Page 3: ...ighl1 c11 11 rlLhs from date of shipml nl hy company This warranty is limited to Lhl furnish ing of any part w hich to our s l i l ldinn has h ll pro c n dPfPcti l Si tnl ns J llis will not in any casl assunw r sponsibility for al liPd 1 quiprnl nt 1if any kind S E Si1 nH ns Allis Warranty Form 20160 Typical Shipping Methods Used With LA Breakers II Courtesy of NationalSwitchgear com ...

Page 4: ...midity or tempera ture fluctuations space heaters or the equivalent should be provided_ INSTALLA TION The LA air circuit breaker is completely adjusted tested and inspected before shipment but a careful check should be made to be certain that shipment or storage has not resu lted in damage or change of ad justment Circuit breakers should be instal led in a clean dry well venti lated area in which ...

Page 5: ...akers are properly located in switch gear at installation 6 Check the alignment of the secondary disconnect fingers to ensure against misalignment due to possible distortion of fingers during shipment and handling 7 Once the breaker is energized it should not be touched except for operating since most of the com ponent parts are also energized MAINTENANCE Occasional checking and cleaning of the br...

Page 6: ...e linkage to be moved into position shown in Det ai l B Kickoff springs 199 move rollers away from stop block 1 71 then the toggle linkage is moved by torsion spring unti l latch 175 clear trip latch 153A Spring 155 causes trip latch 153A to reset under latch 175 Trip flap 1538 should normally stop against the front surface of latch 175 When the closing springs are fully charged roller 168 engages...

Page 7: ...leting the close coil circuit through an auxiliary contact of the breaker TABLE 2 OPERATING PROCEDURE ELECTRICALLY OPERATED BR EAK ERS CAUTION MAKE SURE THAT RACKING CLEVIS FI G 4 ARE IN TEST OR CONN ECT POSI T ION BEFORE CHARG IN G SPR INGS DO NOT CHARG E SPRINGS WITH CL EV IS IN DISCONNECT POSITION AS THIS COULD CAUSE DAMAGE T O BREAKER Operation Charging Springs Closing Tripping Procedure Energ...

Page 8: ... to the marking in the cubicle to be certain that it is fully connected Two stop nuts are provided on the racking screw to set the connected position These are adjusted by setting the angle of the racking clevis as shown in detail D of Figure 1 and by tightening the nuts against the L links 281 the two nuts 278 should be then locked against each other CAUTION TO AVOID DAMAGE TO THE RACK ING MECHAN...

Page 9: ...ition slot toward you Do not attempt to manually charge springs with clevis in disconnect position as shown in Figure 4 11 Charge the breaker manually for maintenance closing see Maintenance Closing below to check latch and linkage movement 12 Check breaker adjustments see Adjustments Page 7 LUBRICATION Lubrication should be a part of the servicing procedure Old grease should be removed from beari...

Page 10: ...ertical position the energy in the springs is slowly released against the closing handle assembly cam face ADJUSTMENTS During maintenance inspections the following items should be checked to ensure that the original settings are maintained Trip Latch Engagement Figure 2 Toggle latch 175 should engage the fu II width of trip latch 153A when the breaker is closed in the nor mal manner The tension on...

Page 11: ...ust be removed rlinge Contact Fingers Figure 6 Hinge contact fingers can be replaced by removing lower connector and removing fingers individually Moving Arcing and Main Contact Figure 6 Either moving arcing contact 73 or main contact 70 or both may be removed and replaced as follows Remove two screws on each side of lower connector The complete movable contact assembly may now be brought to a ben...

Page 12: ...lead of coi l must be connected to term inal 7 negative and the reel lead of coil connected to terminal 8 positive of t he stat ic trip device When the tripping actuator has been replaced the circu it breaker should be given a FUNCT ION T EST to ensure proper operation of all components Refer to Siemens Al lis Instruct ion Book 18X4827 for the procedures of the FUNCTI ON TEST Motor Cutoff Switches...

Page 13: ...has opened stopping the motor and the closing coil switch 4 has closed Upon application of power to the closing circuit the breaker will close Switches then return to No 1 position Refer to Notes 1 2 NOTE 1 In position 3 there is clearance between both levers and the switch actuating leaf Clearance may be minimal appx 1 64 or up to 1 16 inch It is important to completely remove pressure from the s...

Page 14: ...to perm it re moval of rotors 955 from shaft 954 To change rotors 955 from a to b position the rotor should be rotated 60 in the clockwise direction aher removal and replaced on the shaft in this new position Shunt Trip Option Each electrically operated breaker is equipped with a shunt trip attachment for tripping from a remote location See Figure 9 Since the shunt trip coil is designed for a mome...

Page 15: ... o0 2000 2400 2800 3200 3600 3200 LA 4000A 4000 Amps 2000 2500 3000 3500 4000 4500 4000 8 Static T rip Option The optional tripping devices are covered in detail under their own instruction books wh ich are referenced on the last page Several types are available that provide a range of tripping functions The Static Trip 11 device mounts onto a slide type bracket on the circuit breaker To remove tr...

Page 16: ...1 11 278 I I II I I I I I 1 1 1 II I ll I Ill l J J t g 1 y iff r 1 L J 4l LH SIDE VIEW B 12 901 13 0 0 RH SIDE VI EW C 240 241 0 1 J____L I 902 0 0 u SECTION AA 0 syli L 1 t 6 I 113 241 240 ill 0 v 1 J L_ _ M J I t FRONT VIEW A Fig 1 LA 3200A Circuit Breaker Courtesy of NationalSwitchgear com ...

Page 17: ...ur ll DETAIL C 231 168 VIEW AA VIEW EE 215 171 LH SIDE VIEW FRONT VIEW 155 l 3 VIEWFF cr 14 1538 Fig 2 Operator 148 VIEWD E 223 233 224 RH SIDE VIEW 1 1 224 _ LU J c 1 7 VI EW HH I I 161 I J l jj F 1155 J j t 1 L f r Courtesy of NationalSwitchgear com ...

Page 18: ...SWITCH 88 SPRING CHARGI NG MOTOR CSC CONTROL SWITCH CLOSE CONTACT CST CONT ROL SWITCH TR IP CONTACT R RED INDICATING LAMP G GREEN INDICATING LAMP a AUX SWITCH OPEN WHEN BR KR IS OPEN b AUX SWITCH CLOSED WHEN BR KR IS OPEN Ml MECHANICAL INTERLOCK CT CURRENT TRANSFORMER STD STATIC TRIP DEVICE AL A LARM DEV ICE RC ALARM DEV ICE EL ECT RESET COIL TA TRIP ACTUATOR UV UNDE RVOLTAGE TR IP COIL CLASS C WI...

Page 19: ... the secondary disconnects clear the rail extension References Lifting bar assembly 18 727 837 501 Extension rail 18 193 732 502 See Page 4 I 0 LIFTING BAR r c0 LIFT HERE RACKING CLEVIS L _ MECHANICAL INTER LOCK SIDE VIEW B FRONT VIEW A I I SECTI ON BB DETAIL A Fig 4 Typical Racking Mechanism and Drawout Interlock 16 Courtesy of NationalSwitchgear com ...

Page 20: ...moval of breaker from cell 4 Use crank to rack breaker into cell 5 Check panel shutters 0 for free movement before closing panel 17 REMOV ING CIRCUIT BREAKER 1 Mount ex tension rails to unit as described under In serting Circuit Breaker 2 With circuit breaker in disconnect positi on release breaker interlock and pull breaker out 3 Pull on safety lock handle to fully release breaker from cell 4 Rol...

Page 21: ...ING HANDLE SEE PAGE 6 MAINTENANCE CLOSING HANDLE ELECTR ICALLY OPERATED BREAKERS SEE TAB LE 3 STEP 1 STEP 2 TYPICAL MAINTENANCE CLOSING HANDLE PROCEDURE Fig 5 Maintenance Closing 18 J Courtesy of NationalSwitchgear com ...

Page 22: ...g 6 11Q L J i J i J c J 957 c J c J 955 c J Detail C Auxiliary Switch Fig 8 c J I c J c J I c J c J l CJ Detail A Secondary Disconnect Assembly Detail B Shunt Trip Fig 7 Fig 9 19 Courtesy of NationalSwitchgear com ...

Page 23: ... I SEALED ACTUATOR Detail A Bel l Alarm Fig 11 738 Detail B Undervoltage Trip with or without Time Delay Fig 10 20 Courtesy of NationalSwitchgear com ...

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