Siemens-Allis LA-4000A Instructions Manual Download | Manualshive

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Summary of Contents for LA-4000A

Page 1: ...r SIEMENS ALLIS INSTRUCTIONS TYPES LA3000A LA4000A UNFUSED AIR CIRCUIT BREAKERS WITH MANUAL OR ELECTRICAL OPERATORS 18X5689 MAY 1977 ...

Page 2: ...LLUSTRATIONS Fig 1 Fig 2 F g 3 Tyoical LA 30aDA Breaker Outline T ical LA 3000A 4000A Operator Typical Wiring Diagram Electrically Operated Breakers _ Fig 4 Typical RaCking Mechanism and Drawout Interlock Fig 5 Maintenance Closing 13 14 15 16 18 Fig 6 Fig 7 Fig 8 Fig 9 Typical Panel Assembly Secondary Disconnect Auxiliary Switch Shunt Trip Fig 10 Undervoltage Trip Fig 11 Bell Alarm 19 19 19 19 20 ...

Page 3: ...operation but not more 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 Typical Shipping Methods Used With LA Breakers ...

Page 4: ...n a clean dry well ventilated area in which the atmosphere is free from destructive acid or alkali fumes Before installing make certain that the breaker contacts are in the open position and primary disconnect fingers are lubricated with Allis Chalmers electrical contact lubri cant supplied with accessories 1 After the breaker is installed in position close it manually by the maintenance closing m...

Page 5: ...tment without using the guide rail extensions supplied See page 17 2 Read the Instruction Book before installing or making any changes or adjustments on the breaker 3 As the closing springs on stored energy breakers may be charged with the breaker contacts in either the open or closed position extreme care should be taken to discharge the springs before working on the breaker 4 When charging manua...

Page 6: ...sing springs thru link 163 and spring hanger 157 Rotation of cam 159 allows roller 181 in toggle linkage to be moved into position shown in Detail 8 Kickoff springs 199 move rollers away from stop block 171 then the toggle linkage is moved by torsion spring until latch 175 clears trip latch 153A Spring 155 causes trip latch 153A to reset under latch 175 Trip flap 1538 should normally stop against ...

Page 7: ...otor cut off switch MCO Trip free operation of the mechanism discharging the springs on a closed breaker is pre vented by completing the close coil circuit through auxiliary contact of the breaker TABLE 2 OPERATING PROCEDURE ELECTRICALLY OPERATED BREAKERS Operation Charging Springs Closing Tripping Procedure Energize control circuit Move motor control switch on front of breaker to ON position Afte...

Page 8: ... with reference 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 0 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 ...

Page 9: ...aintenance closing see Maintenance Closing belQw to check latch and linkage movement Rotate racking screw to the approximate test position to clear spring dump interlock before attempting to change closing springs 11 Check breaker adjustments see Adjustments Page 7 LUBRICATION Lubrication should be a part of the servicing procedure Old grease should be removed from bearing pins and other non curre...

Page 10: ...g items should be checked to ensure that the original settings are maintained Trip Latch Engagement Figure 2 Toggle latch 175 should engage the full width of trip latch 153A when the breaker is closed in the nor mal manner The tension on spring 155 can be increased if required by bending spring tab on trip flap to wards the front of the breaker Too much tension will interfere with the capability o...

Page 11: ... case screws 60 must be removed Hinge 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 ...

Page 12: ...lationship The black lead of coil must be connected to terminal 7 negative and the red lead of coil connected to terminal 8 positive of the static trip device When the tripping actuator has been replaced the circuit breaker should be given a FUNCTION TEST to ensure proper operation of all components Refer to Allis Chalmers Instruction Book 18X4827 02 for the procedures of the FUNCTION TEST Motor C...

Page 13: ...3 The motor cutoff switch 3 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 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 f...

Page 14: ...g 956 are removed to permit reo 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 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 9 Since the shunt trip coil is ...

Page 15: ... 3000A 3200 Amps 1600 2000 2400 2800 3200 3600 3000 LA 4000A 4000 Amps 2000 2500 3000 3500 4000 4500 4000 Static Trip Option The optional tripping devices are covered in detail under their own instruction books which are referenced on the last page Several types are available that provide a range of tripping functions The Static Trip II device mounts onto a slide type bracket on the circuit breake...

Page 16: ...02 DETAIL 0 l i I l I I I I I 1 J I I I I ir J to f t 0 0 I 1 t LH SIDE VIEW B I 901 12 1 ______ r 4 Jj _902 o o o 0 o RH SIDE VIEW C Fig 1 LA 3000A Circliit Brenl er 240 241 FRONT VIEW A SECTION AA k 241 240 0 ...

Page 17: ... 11 171 1538 VIEWCC 231 168 VIEWAA VIEW EE 199 o LH SIDE VIEW 149 I 48 204 J l rr 1 1T l l1lt1 DETAIL G 157 f i h J 188 FRONT VIEW 223 ij VIEW FF kllf 233 rr fl V I 224 g m 1Ilr VIEWHH Fig 2 Operator 111 1 181 t VIEWDD 175 r ommm 113 ...

Page 18: ...T BREAKER TRIP COIL Y AUX CLOSING RELAY ANTI PUMP MCO MOTOR CUTOFF SWITCH 88 SPRING CHARGING MOTOR CSC CONTROL SWITCH CLOSE CONTACT CST CONTROL SWITCH TR IP CONTACT R RED INDICATING LAMP G GREEN INDICATING LAMP AUX SWITCH OPEN WHEN 8R KR IS OPEN b AUX SWITCH CLOSED WHEN BR KR IS OPEN MI MECHANICAL INTERLOCK CT CURRENT TRANSFORMER STD STATIC TRIP DEVICE AL ALARM DEVICE RC ALARM DEVICE ELECT RESET C...

Page 19: ...er In parti cular watch that the secondary disconnects clear the rail extension References Lifting bar assembly 18 727 837 501 Extension rail 18 193 732 502 See Page 4 1 1 LIFTING BAR __I LIFT HERE MECHANICAL INTERLOCK SIDE VIEWS FRONT VIEW A 266 SECTION BB DETAIL A Fig 4 Typical Racking Mechanism and Drawout Illterloc 16 ...

Page 20: ...revents accidental removal of breaker from cell 4 Use crank to rack breaker into cell 5 Check panel shutters 0 for free movement before closing panel REMOVING CIRCUIT BREAKER 1 Mount extension rails to unit as described under in serting Circuit Breaker 2 With circuit breaker in disconnect position release breaker interlock and pull breaker out 3 Pull on safety lock handle to fully release breaker ...

Page 21: ...ANOLE SEE PAGE 6 RELEASE LATCH HOOO ____ MAINTENANCE CLOSI NG HANDLE ELECTRICALLY OPERATED BREAKERS SEE TABLE 3 STEP 1 __ STEP 2 MANUAL TRIP ROD _____ TYPICAL MAINTENANCE CLOSING HANDLE PROCEDURE Fig 5 Maintenance Closing L ...

Page 22: ... 75 82 70 67 6 0 62 CONTACTS Fig 6 956 Q c J t J P t J 957 t J t I t I Detail C Auxiliary Switch Fig 8 c J t I t I c J c J lO I 808 E3 I L p r Detail Au Secondary Disconnect Assembly a Oetail B Shunt Trip Fig 7 Fig 9 ...

Page 23: ... SEALED ACTUATOR Detail uAu Sen Alarm Fig 11 1310 TIME DELAY ADJUSTMENT VOLTAGE ADJUSTMENT Dmil s Undervoltav Trip with or without Time O laV Fig 10 L ...

Page 24: ...th beacon P 325 grease Caution Needle bearings should not be removed from the retaining part The sleeve bearings should be removed washed in clean solvent drained and dried thoroughly before lubricating with beacon P 290 LUBRICATION CHART LUBRICATION REQUIRES LUBRI SUGGESTED LUBRICATION DISASSEMBLY RECOMMENDED CATION AT EVERY OPERATIONS EVERY 5 YEARS OR ANY KEY PART DESCRIPTION OR EVERY SIX MONTHS...

Page 25: ...A and LA 4000A 18X5690 Static Trip II Instructions 18X4827 Description of Operation Static Trip II 18X4814 Types LA 600A LA 1600A unfused M O or E O Circuit Breaker and Types LAF 600A LAF 1600A fused M O or E O Circuit Breaker 18X5214 Renewal Parts for LA 600A LA 1600A LAF 600A and LAF 1600A 18X5215 Portable Test Set Type PTS l For Static Trip II 18X5322 Portable Test Set Type PTS 2 For Static Tri...

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