Allis-Chalmers MA-150B, Instruction Book

Page 1: ...HALMERS INBTRUCTIOry BOOK y j TYPE D MOVABLE PORTION MA 75 150 250B RUPTAIR MAGNETIC POWER CIRCUIT BREAKER AND AUXILIARY EQUIPMENT STOREO ENERGY OPERATOR JUNE 1967 BWX 6657 3 i Courtesy of NationalSwitchgear com ...

Page 2: ...G LATCH TRIPPING AND CLOSING SOLENOID AUXILIARY EQUIPMENT AUXILIARY SWITCH INTERLOCK PLUNGER SPRING DISCHARGE OPERATOR CONTROL RESET RELAY 3 1 a 3 1 b 31 c 32 3 3 3 4 3 5 3 6 3 7 3 8 t JK 3 9 3 10 3 11 3 1 2 3 12A 3 13 3 14 V rO i PART 4 DISCONNECT SECTION r to sS 4 1 BREAKER MECHANISM CONTACTS SERVICING CONTACTS BREAKER TIMING ARCING CONTACT HINGE JOINT CONTACT PRESSURE ON HINGE JOINT CONTACT ALI...

Page 3: ...RED ENERGY OPERATOR 72 320 047 401 FIGURE 4A 72 420 041 401 TYPICAL SPRING DISCHARGE FIGURE 8 72 420 020 401 TYPICAL CONTROL SWITCH 71 301 758 401 FIGURE 11 TYPICAL AUXILIARY SWITCH 205439 FRONT SIDE VIEW OF TYPE D 4 16 kv 1200 AMP AIR MAGNETIC CIRCUIT BREAKER 205438 VIEW SHOWS APPLICATION OF FIFTH WHEEL ON TYPE D AIR MAGNETIC CIRCUIT BREAKER SIDE VIEW OF TYPE D 4 16 kv 1200 AMP AIR MAGNETIC CIRCU...

Page 4: ...ete A i v l s t 4 i I 4 v T yi i i f r f v ife 4 v v r ipa v 1 i y i A V M f jT S rf si s v 4 jr r iS i A i f f S 4 i Tr 5 f v Vi t s r s S A t i S r i I r r 5 1 5 5 W t 4 1 V S I i r v a f i V i 4 i f v V i j i S1 y x s r rf f is i i 5 i i r S ji sT fi t vi y i v SK J v i r 4 wp K X v vi y r 4 ivi l v i s 4 vs 4 1 f Vv 1 V v V it V FRONT SIDE VIEW OF TYPE D 4 16 kv 1200 AMP AIR MAGNETIC CIRCUIT B...

Page 5: ...4 t 1 fc f A t fv 4 j A t if h H 4iit 4 1 f 1 5 V i 4 f I r t i Si fij i i 5S v I l V J L t sf 1 V h t i i i f 5 J 4 H 3 t e t r v r v i 4 t J W tar A j ly M 4 rffn 7 a f t a y i iTT T iBte i l If f 4 if 4 b 6 t N k A v4 rfSS rus t L tt fraptm v J jpS fc S Vij ijf a a 5 V jr r ft5 l 33 ii 1 v t i V 5 t 1 T c s tlv t T V i A L r via m t 205438 ssr ra i Courtesy of NationalSwitchgear com ...

Page 6: ... 14 f 2 v S s f f y 4 Is V i Pi t N ft1 j ni vr m i m m hi mt r v t V ft i ft ift A r i 4H 5 iftft ft A r v ft 4 4 i ft ift ft i ft if I ft V i fc r if t ft ft i i 4 rtV r i i ft i M V fv ft ft ih j f ft Si s v 5 ey 1 ft ii S si i f mli K IP l isw s I i f f i 4yl F jp S HU iy 4v f til V ik i P 1 r A i y V 7 Side view of Type 0 4 16 Magnetic C i r c u i t Breaker kv 1200 Amp Air Outer Phase Barrier...

Page 7: ...r I iv f l1 v4 f II S V i i m s vjf gc r 3 s if J r f i t i i f 4 217525 Arc Chute Assembly of Type D 4 16 kv 1200 Amp Air Magnetic Circuit Breaker is tilted back for easy assembly of contacts t Courtesy of NationalSwitchgear com ...

Page 8: ... ALLIS CHALMERS 205442 MANUALLY CHARGING SPRINGS v Courtesy of NationalSwitchgear com ...

Page 9: ...ent is being carried through the main contacts As the movable contact assembly separates from the stationary contact assembly the current transfers very quickly from the main contacts to the arcing contacts thus keeping the main contact erosion to a minimum For breakers equipped with tertiary contacts the current transfers from the mains to the tertiary and then to the arcing contacts As the movab...

Page 10: ...g device of breaker sifould be used for preliminary operation to see that all parts are free and work smoothly The bushings and other insulating parts should be clean and dry All contact surfaces should be inspected to see that they are clean and smooth Do not dress silver surfaces Removal of all phase barriers and removal or raising of arc chute assemblies gives access to breaker for checking adj...

Page 11: ...allowing a gap between latch 4 13 and its roll However part way through the charging operation as the springs are being charged the action of roll 4 19 coming against latch 4 13 will be heard The action of links 4 9 and 4 10 going over toggle will be heard at the end of the charging operation Releasing closing latch 4 13 will free the closing springs to drive the breaker closing 1 inkage see below...

Page 12: ...i z i n g t h e t r i p c i r c u i t T h i s r o t a t e s l a t c h 4 a l l o w i n g t h e c l o s i n g l i n k a g e t o c o l l a p s e a n d r e s e t The t r i p p i n g a c t i o n d e s c r i b e d above can t a k e p l a c e a t a n y t i m e d u r i n g a c l o s i n g o p e r a t i o n e i t h e r manual o r e l e c t r i c a l a n d r e g a r d l e s s o f w h e t h e r o r n o t t h...

Page 13: ...ose AS THE CONTACTS APPROACH THE BREAKER CLOSE EOS O S OBSERVE THE POSITION OF CRANKS 4 4 ON ROUS 4 24 CARE SHOULD BE TAKEN THAT THE CRANKS DO NOT PASS K THE ROLLS ALLOWING THE CONTACTS TO SNAP OPEN CAUTION Since the motor gears are self locking the contacts can be cranked to any position and held for adjustment checks e To prepare for normal operation Trip breaker open Remove spring charging hand...

Page 14: ...LENOID i The tripping solenoid 4 36 and the closing solenoid 4 37 action and adjustments are identical Each solenoid has been adjusted In the factory and should requi r e no further adjustment I f readjust ment is required i t should be trade only when the trip and closing latch bites are in correct adjustment see Sections 3 7 and 3 8 The armature should move freely and have no binds The travel of...

Page 15: ... 16 Adjustment is made by changing the effective length of the yoke attaching the foot lever to the interlock plunger 3 12A SPRING DISCHARGE Fig 4A During insertion and removal of the circuit breaker from the oubI c le the closing springs of the operator will automatically discharge This is accomplished when paddle 4A 6 is moved upward upon coming in contact wit cubicle stop angle 4A 5 This In tur...

Page 16: ...esistor is adjusted to limit the speed of the unloaded motor I t is factory set to operate the motor at rated and minimum voltage and limit the coast of the motor so that the pin on the gear coasts past top center but not beyond 10 o clock With too much resistance the motor w i l l s t a l l With too l i t t l e resistance the motor w i l l coast too far and the cam w i l l reclose the 88 3aa swit...

Page 17: ... the UJT are an open circuit until the voltage at E exceeds a precise level Vp In other words the UJT does not allow current to flow from point E to point B until the UJT is turned on by the firing voltage Vp The voltage drop Vc across the terminals AB charges the capacitor C through the variable resistor Rj The time that it takes the capacitor C to charge to the firing voltage Vp of the UJT is th...

Page 18: ...nducts even after the pulse is removed The relay contacts R close allowing current to flow through the spring release coil circuit The gate terminal of the SCR is protected from random high frequency pul se by capacitor C2 which provides a short circuit to ground for these pulses In other words the reactance of the capacitor C2 is negligible at high frequencies and the capacitor allows current to ...

Page 19: ...nto tension and pulling latch roll 19 back of closing latch 13 II Driving cranks 4 turning counterclockwise have gone overcenter throwing links 9 Into compression with latch roll 19 against closing latch 13 If latch 13 does not pick up the load link 9 will move forward allowing roll 24 to go around driving crank 4 to position as shown in I Courtesy of NationalSwitchgear com ...

Page 20: ... overtoggle springs are fully charged and will snap links 9 and 10 overtoggle against the stop 1 1 1 I IV y IV Driving cranks 4 have rotated free links 9 and 10 are overtoggle springs fully extended ready for close when closing latch 13 Is released 1 V v r Courtesy of NationalSwitchgear com ...

Page 21: ...nit Latch roll 19 forces toggle roll 15 forward with latch roll 14 held by t r i p latch 27 the breaker w i l l close V 1 Screw 32 The toggle roll 15 Is overtoggle against stop 59 come in contact with crank 12 forcing link 10 to rotate breaking the toggle between links 10 and 9 V I f I V Courtesy of NationalSwitchgear com ...

Page 22: ...ose operation Breaker has just been tripped Trip latch 27 has released latch roll 14 allowing i t to rotate Links 20 and 21 drop almost vertically until stop 59 forces toggle roll 15 back to break the link 20 21 toggle and allowing the 4 bar linkage to return to normal position as shown In Courtesy of NationalSwitchgear com ...

Page 23: ... replaced A Hinge joints Remove the disconnect arms as a unit by removing screw 3 24 nut 3 14 and spring washers 3 23 Carefully inspect all contact surfaces Silver washers 3 25 and adjacent surfaces should be clean and free of roughness or galling Lubricate washers 3 25 and mating surfaces by rubbing in microfine dry graphite used spar ingly Remove excess graphite Reassemble adjusting hinge joint ...

Page 24: ...t should normally be necessary The horizontal pairs of main contact fingers in each phase should make with the moving contact simultaneously Note Contacts on different phases should not necessarily make simultaneously they can vary as much as 1 32 inches If not already detached remove pin l 46 and detach link 1 47 from disconnect arms 3 18 and 0 19 On MA 75 150B and FC 150 250 500 Breakers Detach ...

Page 25: ...t fingers 3 11 and the contact on the disconnect arms 3 18 and 3 19 should be 7 32 to 1 4 inches Dimension b_ In View A A of Figure 3 Adjustment is made by opening or closing the gap with nut 3 1 Reconnect link 1 47 to disconnect arms 3 18 and 3 19 using pin Figure 3 e 4 8 CONTACT STROKE Fig 3 Contact stroke should be checked and adjusted only when the contacts are in proper alignment see Section ...

Page 26: ...fter loosening nut 1 42 increase or decrease effective length of rod end 1 40 by screwing or unscrewing it into piston stem 1 44 Adjust rod ends 1 40 on both puffers the same amount Tighten nuts 1 42 replace pin 1 33 and check dimension 6 33 i l f Courtesy of NationalSwitchgear com ...

Page 27: ...ier stack d The barrier stack 2 23 consisting of a number of refractory plates with Vee Shaped slots cemented together The barrier stack cools squeezes and stretches the arc to force a quick Interruption e The barrier 2 1 containing coolers 2 28 through which the by product gases of interruption pass The barrier completes the cooling and deionizing of the arc products Arc chutes are normally tilte...

Page 28: ...re tightened securely on all three phases 5 4 BARRIER STACKS Fig 2 The barrier stacks are fragile and should be handled carefully The barrier stacks should be inspected for erosion of the plates in the areas of the slots The stacks should be replaced when a milky glaze is observed on the full length of the edges of most of the slots They should be likewise replaced if plates are broken or cracked ...

Page 29: ...i SANUAL PANEL SPRANG ASSEMBLY 4 3 sacw 33 27 GU0E TUBE 42 TRF ROD jivGROUND CONTACTS T26 CLi 3 rPW r LANYARDv 3 1 AUX SWITCH 15 END n 4 tQrNUT PI aO i XMI i J GOJOE c U BAR 42 NUT 73 LOCKWG 28 RNHOLE PSTCN STEM HI is CRAW 301 0 FOOTLEVER WTERfiCX RELEASE 5 RELAY 25 1 i 6 PUFFER MECHANICAL FT INTERLOCK 24 i SWITCH Q INTERLOCK PUMGER OPENING SPRING SPRING DISCHARGE SEE FIG 4A i FIG i TYPICAL MAGNET...

Page 30: ...C RUNNER l i T T n lo o V J I l i I h F STATIONARY END ARC RUNNER i f 1 1 4 i i E I I I i i i HI 1 f i I i o to i 1 l i 5 i 5 i J A 1 I i I i n i l x TTSCOiL 12 FRONT r i J f J t a o o COL r 15 REAR vD V n A 1 18VCORE i Stfg 11 fl mii i e o r 1 m IlMi i 21VWASHER i i k i 7 H o m i CORE i 18 A i o f i i U 1 h t L i iii i 4 I O i i i i FIG 2 TYPICAL ARC CHUTE JUNE11 1962 71 401 520 401 i ...

Page 31: ... 26 VIEW A Aa ARCNG CONTACTS ENGAGING VVBELVLLE V WASHER HI s n 4 PLATE 6 F x TUB i2l _CHSCOW CT DSCOWECT n 19 ARM EH ARM RK i s VCW A A BREAKER LATCHED 1 24 SCREW NUTT 14i m 23VSPF5NG 55 1 WASHES a I i i SILVER 6S R 25 HI ii T FSG 3 TYPICAL STUD S SUPPORT JUNE 13 5962 V W A A MAIN CONTACTS ENGAGWG 71 401 522 401 ...

Page 32: ...1 rLINK I i34 HEX NUT ROLL 424 r SOLENOID UNK n in I7 TRIP COIL I n V V V CRANK 12 r l6 SPACER TArTRIP PIN x CLOSING V SPRINGSA PTVTRIP CV LATCH 1 SCREW 32 65HSCREW m LATCH 25HSPRING SPRING LINK MO 73 ROLL T A m 1 LATCH 26KPIN 22V AR I LINK f 9 LINKH6I ROLL FIG 4 SE 4 STORED ENERGY OPERATOR APRIL K 1967 72 320 047 40 ...

Page 33: ...INK PIN ARM PADDLE r in 1 STOP ANGLE n x a g r M Tl f t J 5 1 I t i i i 1 i ft rn 3 1 i 1 i i PI p i Li 1 P i JO r T 1200 A 2000 A I T P l HI FIG 4A1 TYPICAL SPRING DISCHARGE APRlk t 1967 I I 72 420 041 401 ...

Page 34: ...SWITCH p L i o A i n i nrr LOSE C RCU T u l U 1 i r SPR G CHARGE INDICATOR i SUPPLY 8 8 2 iii rb F n in I SWITCH z i T P i i t 2 rCAM r t 1 J A04 SCREW 3 LOCKNUT A 4 i 3 ADJ SCREW t S I I i r LOCKNUT 8 i ii 1 5 I s Li m i LEVER T 3 ADJ SCREW 4VLOCKNUT C 4 73 m i i f I F I G 8 TYPICAL CONTROL SWITCH JULY 27 1966 s 2 420 020 401 y ...

Page 35: ... RING STUD M ROTOR ASSEMBLY IH 7 BEARING I n 3 ROTOR ASSEMBLY X 8 J 8USHING P BARRIER l 2 SSI s M SHAFT BEARING 4 I B L JE m 73 10 J CRANK S ARM STATIONARY CONTACT m M M m m 4 j MOUNTING BRACKET I AMOUNTING BRACKET I FIG il TYPICAL AUXILIARY SWITCH JULY 16 1958 71 301 758 ...