Siemens-Allis LA-1600A, Instructions Manual

Page 1: ...ALLIS INSTRUCTIONS TYPES LA 600A and LA 1600A UNFUSED AND TYPES LAF 600A and LAF 1600A FUSED AIR CIRCUIT BREAKERS WITH MANUAL OR ELECTRICAL OPERATORS 18X5214 01 September 1976 Courtesy of NationalSwitchgear com ...

Page 2: ...re than eighteen months from date of shipment by company This warranty is limited to the furnishing of any part which to our satisfaction has been proven defective Allis Chalmers will not in any case assume responsibility for allied equipment of any kind See Allis Chalmers Warranty Form 5992 23 Typical Shipping Methods Used With LA Breakers I Courtesy of NationalSwitchgear com ...

Page 3: ...II and LimiTrip Overcurrent Trip Devices 2 LA 600A LA 800A and LA 1600A Operator 7 Typical Wiring Diagram Eleclricaliy Operated Brea kers 8 Detail of Typical Racking Mechanism and Drawout Interlock 9 Typical Racking Mechanism and Dr twout Interlock 10 Typical LA 1600A Breaker Ouliine 12 Typical LA 600A and LA 800A Breaker Out ine 13 Maintenance Closing 15 Typical Operator Assembly 16 Contact ASM m...

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Page 5: ...t Limit Fuse Trigger Fuse TRIPPING TRANSFORMERS OPTIONAL DEVICES Secondary Disconnect Assem Option Auxiliary Switch Option Shunt Trip Option Undervoltage Trip Device Option Bell Alarm Switch Option Static Trip Option Fig 10 LAF 600A 1600A Anti Single Phase Device Trigger Fuse Assembly Fig 11 LA 600A 1600A Secondary Disconnect Group Fig 12 LA 600A 1600A Auxiliary Switch Group Fig 13 LA 600A 1600A S...

Page 6: ...lts and open breaker contacts before installation 11 INSTALLATION The 11 LA 11 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 resulted in damage or change of adjustment Circuit breakers should be installed in a clean dry well ventilated area in which the atmosphere is free from destru...

Page 7: ...should be included in the breaker maintenance routine If the circuit breaker is not operated during extended periods the breaker should not remain in either the closed or open position any longer than six months Maintenance opening and closing operations should be made to ensure freedom of movement of all parts CAUTIONS TO BE OBSERVED IN THE INSTALLATION AND OPERATION OF 11 LA 11 CIRCUIT BREAKERS ...

Page 8: ...LA l 600A circuit breakers use the same closing mechanism or operator l The closing springs are larger for the 1600 ampere breaker Three configurations of the operator W are available for charging the closing springs These are manual charging electrical charging and combination manual electrical charging Al I operators are identical except for the means of supplying energy to the closing springs A...

Page 9: ...r system Refer to Figures 3 and 4 and Table 2 With power available to the control circuit closing the motor control switch Ml will start the automatic charging cycle The motor gear box pinion rotates gear 86 counterclockwise cam follower 95 engages an arm of wind and close cam 85 which rotates the cams in the same manner as for the manually charged breaker When the wind and close cam 85 reaches it...

Page 10: ...cubicle while the closing springs are charged Refer to Figure 5 with the breaker resting on the cubicle rail the fol lowing sequence should be used to rack the breaker into the cubicle CAUTION ON ELECTRICALLY OPERATED BREAKERS BE SURE MOTOR CONTROL SWITCH ON THE FRONT OF THE BREAKER IS OFF 1 Push trip bar in and lower interlock slide 110 note slide interlock cannot be opened unless manual trip bar...

Page 11: ... tripped trough the interlock m breanism t Fth x I e roller interlock wil CGain clear the floor c th of the losed breaker into ore it of the CONNECTEa Osition CONNECTED positihdr the procedure is th heme only kwise kir loc breaker the position at the device should be1e iecked the cubicle to be c feiin that it is fully conrin ted Two dng screw to set the Jts lnected position the acbre he racking cl...

Page 12: ...standard breaker and the fused breaker The additional lifting lugs ore provided as part of the breaker because the additional overhang of the fuses shifts the center of gravity and lifting from the usual position causes tipping of the device 7 Courtesy of NationalSwitchgear com ...

Page 13: ...ers of the drawout type to the disconnected position 3 Remove breaker from cubicle 4 Remove arc chutes 75 Figure 1 and 2 and examine for burned cracked or broken parts To remove arc chutes proceed as follows a Move breaker to disconnect position b Turn racking screw until crank is in yertical position giving maximum clearance between screw and holding bar c Remove wing nuts from holding bar d Ti I...

Page 14: ...ese points See Contact Replacement page 11 Maintenance Closing During inspection prior to instal lotion and for routine maintenance inspections the breaker con w tacts may be closed slowly to check clearances contact adjustments and movement of links and latches The manual closing handle is used for maintenance closing the breaker Electrically operated breakers do not have a manual closing handle ...

Page 15: ...ed Trip Latch Engagement Refer to Figure 3 Toggle latch 35 should engage the full width of trip latch 13 when the breaker is closed in the normal manner To adjust the tension on spring 15 can be increased by bending spring tab on trip flap towards the front of the breaker Too much tension will interfer with the capability of the tripping actuator to move the trip flap so over bending should be avo...

Page 16: ...lieve the compression on springs 10 There ore two springs behind each finger and it is important that they be positioned properly upon reinstal lotion If difficulty is experienced in correctly positioning these springs the upper and lower primary disconnects 123 Figure 1 may be removed from each phase and the breaker in verted to rest on the ends of connectors 4 and 11 After the contact fingers ar...

Page 17: ...t that is fed to the tripping actuator This device then causes the circuit breaker contacts to open and isolate the circuit Mounted on the circuit breaker the tripping actuator is held in a charged position by a perma nent magnet It contains a coil that is energized by the output of the static trip device When energized the coil causes the magnetic flux to shift to a new path releasing the stored ...

Page 18: ...re proper operation of all components Refer to Allis Chalmers Instruction Book J 18X4827 for the procedures of the FUNCTION TEST Motor Cutoff Switches The function and adjustment of the motor cutoff switches on electrically operated breakers is described in Figure 16 13 Courtesy of NationalSwitchgear com ...

Page 19: ...uses When the C L fuse interrupts its associated trigger fuse also opens and releases a plunger which releases a precompressed spring contained in the trigger fuse hous ng The plunger operates arm 2 which moves the toggle releasing the spring loaded lever 19 which engages circuit breaker interlock thru link 20 This trips the circuit breaker and holds the circuit breaker in the mechanical trip free...

Page 20: ...mit removal of rotors 250 from shaft 249 To change rotors 250 from 11 a 11 to 11 b11 position the rotor should be rotated 60 in the clockwise direction after 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 13 Since the shunt trip coil is designed for a...

Page 21: ... 450 500 500 60 100 200 400 600 Amps 300 375 450 525 600 675 750 600 90 150 300 600 O Ground Element Breaker Tripping Long Time Element Calibrated Pick Up Type and XFMR Calibrated Pick Up Settings Max Settings Frame Rating Cont Size Primary A B c D E F G Rating 20 40 80 lOOOk LA 1600A 200 Amps 100 125 150 175 200 225 250 250 40 80 160 200 400 Amps 200 250 300 350 400 450 500 500 80 160 320 400 800...

Page 22: ...l tripping devices are covered in detail under their own instruction book 18X4827 Several types are avaHable that provide a range of tripping functions Any of the static trip devices are usab le with any of the tripping transformers The Static Trip II device mounts o nto a slide type bracket on the circuit breaker To rer nove trip device the terminal block cover located above the trip deviCe shoul...

Page 23: ...I 106 108 109 so 76 75 76 75 I 76 75 Fig 1 Typical LA 1600A Breaker Outline 74 76 75 Fig 2 Typical LA 600A Breaker Outline 18 I I 42 43 44 1 76 75 I FRONT VIEW 6 so Courtesy of NationalSwitchgear com ...

Page 24: ...15 I 47 93 DETAIL B DETAIL C Fig 3 LA 600A LA 1600A Operator 19 Courtesy of NationalSwitchgear com ...

Page 25: ...Tl PUMP MCO MOTOR CUTOFF SWITCH BB SPRING CHARGING MOTOR CSC CONTROL SWITCH CLOSE CONTACT CST CONTROL SWITCH TRIP 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 MOTOR CONTROL SWITCH CT TRIPPING TRANSFORMER STD STATIC TRIP DEVICE AL ALARM DEYICE RC ALARM DEVICE ELECT RESET COi L TA TRIP ACTUATOR UV UNDERVOLTAGE TR...

Page 26: ...OD 506 SIDE VIEW LIFT HERE ON FUSED BREAKER LIFT HERE ON STANDARD BREAKER CRANK 84STOPWASHER 1 75NUT RACKING CLEVIS DETAIL A Fig 5 Typical Racking Mechanism and Drawout Interlock 21 Courtesy of NationalSwitchgear com ...

Page 27: ... 9 RELEASE LATCH HOOD MAINTENANCE CLOSING HANDLE ELECTRICALLY OPERATED BREAKERS SEE TABLE 3 FIG 1 2 STEP 1 STEP 2 TYPICAL MAINTENANCE CLOSING HANDLE PROCEDURE Fig 6 Maintenance Closing 22 MANUAL TRIP ROD Courtesy of NationalSwitchgear com ...

Page 28: ...28 VIEW A 0 0 XX CX O 0 0 CJ CJl 11 12 Fig 7 Typical Panel Assembly I 23 Courtesy of NationalSwitchgear com ...

Page 29: ...I J 427 428 429 426 425 426 427 460 _ 425 426 427 0 d o FRONT VIEW SIDE VIEW 444 445 446 421 Fig 8 Fuse Attachment Group LAF 600A Breaker 24 Courtesy of NationalSwitchgear com ...

Page 30: ...r I SIDE VIEW 460 do FRONT VIEW 426 428 429 I I I I I 0 447 REAR VIEW 448 452 421 1 437 438 439 440 460 I I I I I I Fig 9 Fuse Attachment Group LAF 1600A Breaker 25 426 428 429 Courtesy of NationalSwitchgear com ...

Page 31: ...13 I 7 9 JO 11 17 15 I I I 14 21 24 26 27 4 20 FRONT VIEW SIDE VIEW Fig 10 LAF 600A 1600A Open Fuse Tripping Device Trigger Fuse Assembly I 26 Courtesy of NationalSwitchgear com ...

Page 32: ... 264 266 253 267 255 264 E 0 11 RY SWITCH FRONT VIEW iroup I 252 _ 267 255 264 94 A 291 290 301 288 287 86 299 288 291 I 290 2s9 SECTION AA LA 600A 1600A Secondary Disconnect Group 27 v Courtesy of NationalSwitchgear com ...

Page 33: ...4 5 6 30 18 21 22 0 0 0 22 Fig 14 LA 600A 1600A Under Voltage Trip Attachment 30 13 25 17 12 26 JOINT DETAIL I 23 16 22 Courtesy of NationalSwitchgear com ...

Page 34: ...I I 218 I PLAN VIEW 218 221 I 216 215 213 214 233 234 227 228 229 230 231 Fig 15 LA 600A 1600A Alarm Switch Group Bell Alarm 31 Courtesy of NationalSwitchgear com ...

Page 35: ...pened stop ping 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 NOTE 1 In position 3 there is clearance between both levers and the switch actuating leaf Clearance may be minimal approx 1 64 or up to 1 16 inch It is important to completely remove pressure from the switch actuating leaf ...

Page 36: ...RS SNAP OFF BRACE 17 88A AND GREASE SCREW LA 3000 BREAKER A F C B ALSO PIN ON RAIL THAT TH IS CLEVIS ENGAGES Fig 17 Lubrication Points on Breaker 33 FULL LENGTH OF SLIDE BOTH SIDES ALSO TOP OF GUIDE RAIL Courtesy of NationalSwitchgear com ...

Page 37: ...AY AS LATCHES ROLLERS WITH MOLYCOTE 557 PROPS ETC 15 171 270 001 E ARCING CONTACTS DO NOT LUBRICATE F SPRINGS_ NO LUBRICATION REQUIRED G DRY PIVOT POINTS_ NO LUBRICATION REQUIRED Lubrication should be checked and renewed as follows LA 600 operations between lubrications 1750 LA 1600 operations between lubrications 500 LA 3000 LA 4000 operations between lubrications 250 WIPE CLEAN AND APPLY MOLYCOT...

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