Siemens-Allis LA-600A Instructions Manual
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Summary of Contents for Siemens-Allis LA-600A
- Page 1 SIEMENS-ALLIS Switchgear i · c INSTRUCTIONS UNFU S ED TYPE S LA-600A, LA-SOOA AND LA-1600A TYPE S LAF-600A, LAF-SOOA AND LAF-1600A FU S ED LOW- VOLTAGE AC POWER CIRCUIT BREAKER S 18X5214-02. December, 1978...
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Page 2: Table Of Contents
LA-600A, LA·800A and LA-1600A Operator ........ -
Page 3: Warranty
WARRANTY Siemens-Allis "LA" air circuit breakers are warranted to be free of defects in material and workmanship for a period of one year from date of initial 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. -
Page 4: Fused Unfused Breakers With Static Trip Ii And Limitrip Overcurrent Trip Devices
A-340143-76 A-340531-77 A-340140-76 A-340521-77 Fused & Unfused Breake rs with Static Tri p II and LimiTrip Overcu rren t Trip Devices... -
Page 5: Receiving And Inspection For Damage
The Three-Line Diagram breakers: shows the following for each circuit breaker compartment: 1. Individually skidded with protective covering for a) Circuit breaker Type (LA-600A, LAF-600A, LA- domestic shipments. 800A, etc.) 2. Within a cubicle on export orders, when part of a b) Trip "XFMR"... -
Page 6: Installation Sequence Cautions To Be Observed In Installation And Operation
DESCRIPTION the same with or without fuses. The fuses mount on a The continuous current ratings of the LA-600A, LA bracket that is bolted to the side rails and upper studs on BODA and LA-1600A circuit breakers are 600, 800 and 1600 the back of the circuit breaker. -
Page 7: Table 1. Circuit Breaker Ratings At 60 Hertz
This LA-600A, LA800A LA-1600A circuit break means that the breaker contacts are free to open at any time ers use the same basic closing mechanism or operator. -
Page 8: (A) Manually Operated Circuit Breakers
(AI Manually O perated Breakers point by operation of one of the tripping means. This will cause rotation of trip latch (13) to a position that releases latch ( 35), allowing toggle linkage to collapse to the posi tion shown in detail (A). TABLE 3 To manually open the circuit breaker, press in manual trip rod ( 48). -
Page 10: Figure 2. Typical Wiring Diagram - Electrically Operated Breakers
CLASS C WI RING NO. 14 WIRE (SIS) ..,... �1 00- 5 57-286-341 ________ _ _ _ __ _ __ __ _ L[:D-,-- ..- - ----..- - I �1 � � � (G' fA) ...,_ BR'KR. CONTACTS SUPPLY �5 STD. -
Page 12: Spring Discharge Interlock
LIFT HERE ON STANDARD BREAKER RACKING SCREW LIFT HERE ON FUSED BREAKER CONTROL SWITCH COVER SLIDE (ELECTRICALLY INTERLOCK INTERLOCK OPER. BREAKERS) SIDE VIEW FRONT VIEW Figure 3A. Typical Racking Mechanism and Drawout Interlock In the CONNECTED position, the interlock will clear CAUTION the cubicle interlock cam and reset, allowing the circuit breaker to be closed This prevents closing a circuit breaker... -
Page 13: Lifting Bar
Lifting Bar ( Figure 3A) CAUTION The lifting bar connects shown for the standard cir On manually charged breakers, the close hood cuit breaker . Additional lifting lugs IT424 Figures 9 & is interlocked to the manual charge cam, and are provided as part of the fused circuit breaker due to the must be clear before racking the circuit breaker overhand of the fuses which shifts the center of gravity. -
Page 14: Maintenance And Adjustments
MAINTENANCE AND ADJUSTMENT S Maintenance A suggested procedure to follow during maintenance inspections: Occasional checking, cleaning and exercising of the De-energize the primary and control circuits. circuit breaker will promote long and trouble-free service. A periodic inspection and servicing, normally at intervals of Rack circuit breakers to the disconnected position. - Page 15 Refer to Figure 2 , page 9, of Parts Ordering Guide 18X5215-02 legend. Figure 5. Typical LA-600A and LA-BODA Breaker Outline 5. Wipe the contacts with a clean cloth saturated with Lubrication a non-toxic cleaning fluid. Lubrication should be a part of the servicing proce...
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Page 16: Maintenance Closing
Maintenance Closing TABLE MA I NTENANCE CLOSING Operation Procedure Closing Contacts 1. Verify that racking mechanism is in TEST position. 2. Pull charging handle DOWN ALL THE WAY (approximately 120 o ). 3. Place blade of screwdriver between hood and spring release latch and hold it in DOWN position. -
Page 17: Operated
MAINTENANCE CLOSING HAN DL E E L ECTRICALLY OPER ATE D BREAKERS MAI NTENANCE CLOSING HANDLE SEE PAG E R E LEAS E LATCH HOOD 1 & 2 SEE TABLE 5, FIGU R E STEP 1 STEP MANUAL TRIP ROD TYPICAL MAI NTENANCE CLOSING HAN D PROC E D U R E Figure 6. -
Page 18: Adjustments
• Adjustments During maintenance inspections, the following items should be checked to ensure that the original settings are maintained: Trip Latch Engagement ( Figure 7) Toggle latch (35) should engage the full width of trip latch (13) when the circuit breaker is closed in the normal manner. -
Page 19: Main Contact Make
Main Contact Make ( Figure Arcing Contact Make (Figure Compression of contact fingers should be between With the movable arcing contact (27) in any one phase .093" .125" (2.4 - 3.2 mm) . This is the difference in touching the mating stationary contact when the circuit the measurement from the breaker base to the tip of the fin... -
Page 20: Contact Replacement
screws and then gradually back off the 1 screw to relieve CONTACT REPLACEMENT the loading from springs (16). The hinge contact fingers can now be removed. To provide easier access to the hinge The contact structure consists of main current carry contact fingers, pin ( 38) may removed after the loading ing contacts and arcing contacts arranged so that initial con... -
Page 21: Motor Cutoff Switch
FUNCTION TEST to ensure tuator as this may destroy the magnetic field set proper operation of all components. Refer to Siemens-Allis up by the permanent magnet and will render the Instruction Book 18X4827-02 for the procedures of the actuator latch i noperative until magnetized. -
Page 22: Fuse Functions
Position 3. Springs charged; motor stopped. The springs have reached charged position. The motor/gear lever (2) has been retracted by roll pins on the large gear as the cam follower (95, Figure 7) on the large spur gear has disengaged fro m the wind and close cam (85). The motor cutoff switch (3) has opened, stopping the motor, and the closing coil switch (4) has closed. -
Page 23: Fuse Attachment Group Laf-600A, Laf·800A Breakers
4 27 42 8 42 9 42 6 -425 4 26 4 27 SIDE VIEW 4 44,445 , 446 FRONT VIEW Figure Fuse Attachment Group LAF-600A, LAF-BOOA Breakers . 21-... - Page 24 42 8 42 9 45 1 SIDE VIEW REAR VIEW 437,438 ,439, 4 40 46 0 FRONT VIEW Figure 10. Fuse A ttachment Group LAF- 1600A Breaker -2 2-...
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Page 25: Open Fuse Trip Device
Open Fuse Trip Device (Figure circuit breaker and hold the circuit breaker in the mechani cal trip-free position. CAUTION The circuit breaker will remain trip free (cannot be closed) until the trigger fuse has been replaced and the not remove trigger fuse cover when breaker associated trip mechanism reset lever (17), has been manu... -
Page 26: Accessories
ACCE S SO RIES '"Limi7iip .. Current Sensors - Tripping Transformers - Static Trip I I The current sensors provided with the optional There are several tripping transformer ratings avail Limi Trip device are integrated units containing two cores able, each with seven calibrated pickup settings (Table 6). with four terminals. -
Page 28: Auxiliary Switch Option
F RONT V I EW COVER R EMOVED Q-11 TYPE AUXI L I A R Y SWITCH ..,...,. 2 67 ..- 258 F RONT V I EW Figure 13. LA-600A, LA-BOOA and LA- 1600A Auxiliary Switch Group - 26 -... -
Page 29: Auxiliary Switch Option Shunt Trip Option
(148) compression spring returns the armature to its normal position. Figure 15. LA-600A, LA-BOOA and LA- 1600A Shunt Trip Group Static Trip Option The optional tripping devices are covered in detail under their own instruction books which are referenced on the last page . -
Page 30: Lubrication
The Limi Trip device mounts on the same slide type bracket on the circuit breaker as Static Trip II and can be removed in a similar manner. If complete removal from the circuit breaker is required, disconnect the red and black actuator leads by separating the disconnect plugs and dis... - Page 31 To lubricate these bearings when parts are disas The sleeve bearings should be removed, washed in sembled, the following procedure is recommended: Clean clean solvent, drained and dried thoroughly before lubrica P-290. in solvent, wash in alcohol, spin in light machine oil, drain ting with Beacon P-325 and repack with beacon...
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Page 32: Figure 18. Lubrication Points On Breaker
TY P I C A L L U B R I C AT I ON C H A R T - L . V . B R E AK E R S LA-3000 B R EA K E R F U L L L E N GT H O F S L I D E BOTH S I D E S A LSO TO P O F G U I D E R A I L... - Page 33 .··...
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Page 34: Instruction Book References
LAF- 1 600A (fused ) (M.O. or E .O.) Circuit Breaker ......1 8X52 1 4-02 & & Renewal Parts for LA-600A, LA-800A LA· 1 600A,. LA F-600A, LAF-800A LAF-1 600A ..1 8X521 5·G;: Portable Test Set Type PTS-2 For Static Trip I I .
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