Allis-Chalmers FB-500A-FC-750A Instruction Book Download Page 1 | Manualshive

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Summary of Contents for FB-500A-FC-750A

Page 1: ...AND AUXILIARY EQUIPMENT STORED ENERGY OPERATOR Book No BWX 6732 or BWX 6632 5 November 1 1968 V V 1 r t K i n i i l WM t i A v I i v V v Courtesy of NationalSwitchgear com ...

Page 2: ...T ALIGNMENT CONTACT LEAD CONTACT STROKE P A R T S ARC CHUTE ASSEMBLY ARC CHUTE ASSEMBLY PHASE BARRIERS TILTING ARC CHUTES BARRIER STACKS 1 1 1 2 2 1 3 1 3 2 3 3 I 3 4 3 5 3 6 3 7 3 8 3 9 3 10 3 11 4 1 4 2 4 2A 4 3 4 4 4 5 4 6 4 7 4 8 5 1 5 2 5 3 5 4 LIST OF ILLUSTRATIONS TYPICAL MAGNETIC BREAKER TYPICAL ARC CHUTE TYPICAL STUD SUPPORT TYPICAL OPERATOR ASSEMBLY TYPICAL AUXILIARY SWITCH TYPICAL OPERA...

Page 3: ...1 FIGURE 5 OPERATOR ADJUSTMENTS 71 209 564 401 FIGURE 8 TYPICAL CONTROL SWITCH 72 320 033 401 FIGURE II TYPICAL AUXILIARY SWITCH 71 301 758 FIGURE 13 TYPICAL OPERATOR LINKAGE DIAGRAM 71 116 481 14 15 VIEW SHOWS APPLICATION OF FIFTH WHEEL ON TYPE F AIR MAGNETIC CIRCUIT BREAKER 205391 LEFT FRONT VIEW OF TYPE F AIR MAGNETIC CIRCUIT BREAKER WITH TYPE SE 3 STORED ENERGY OPERATOR 205399 VIEW SHOWS APPLI...

Page 4: ...nt 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 movabl...

Page 5: ...ing device of breaker should 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 ad...

Page 6: ...mpression will be realized by an audible snap as roll 4 54 13 H drops back on latch 4 18 13 11 when cam 4 34 13 10 clears follower roll 4 35 13 J Continue to rotate handle until motor coupling rotates freely without load 3 3 CLOSING THE BREAKER Energizing the spring release coil 5 50 rotates arm 4 20 and latch 4 18 13 11 clockwise thereby releasing the closing springs The closing springs rotate ar...

Page 7: ...d thus rotating trip latch 14 12 in a clockwise direction Temporarily fixed center 14 E is thereby released enabling link 14 6 to rotate clockwise about fixed center 14 F Since the restraining force on the breaker opening springs is now released they act to rotate crank arms 14 2 and 14 3 clockwise about fixed center 14 B and open the breaker Toggle linkages 14 4 and 14 5 collapse to their posi ti...

Page 8: ...ould clear its latch roll 5 56 by 1 64 to 3 64 Adjustment is made by screw 4 7 I 3 11 CLOSING LATCH Fig 4 5 The closing latch 5 18 should engage its roll 5 54 1 8 to 3 16 above the lower edge of the latch face Adjustment is made by screw 4 42 Note that this adjustment affects the clearance between the trip pin 5 50A and the arm 5 20 See Section 3 12 TRIPPING AND CLOSING SOLENOID Fig 5 3 12 The tri...

Page 9: ... and raises plunger 1 18 sufficiently to release th6 breaker allowing it to be moved in the cubicle The interlock is in proper adjustment when the plunger 1 18 is positioned to 1 11 16 to 1 13 16 above the floor line and causes tripping of breaker contacts when it is raised to a level not more than 2 1 16 above the floor line The latch tripping rod associated with the foot lever should be clear of...

Page 10: ...he 88 1 and 88 2 switch shutting off the motor When the closing springs are discharged the cam is freed and the reset spring 5 32 rotates the cam shaft releasing the switch which closes the motor circuit and starts the spring charge The 88 switch assembly is factory adjusted and pinned in position If readjustment is required remove roll pin 2 loosen nut 3 and rotate the switch assembly clockwise a...

Page 11: ...he standard circuit breaker control limits The time delay error caused by temperature is minor being less than 3 from 20 C to f 80 C and not over 5 to 40 C The voltage regulator and timing circuits are mounted on a printed circuit board and incapsulated in a resilient material for shock resistance The controlled supply voltage charges the capacitor C through the time rate determining resistor R to...

Page 12: ...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 i t takes the capacitor C to charge t o the f i r i n g voltage Vp of the UJT is ...

Page 13: ...nducts even after the pulse is removed The relay contacts R close allowing current t o flow through the spring release coil circuit The gate terminal of the SCR is protected fr om random high frequency pulse by capacitor C2 which provides a short circuit to ground for these pulses capacitor C2 is negligible at high frequencies and the capacitor allows current t o flow through i t In other words th...

Page 14: ...ng main and arcing c o n t a c t s c o n t a c t s should be replaced A Hinge j o i n t s Remove t h e disconnect arms as a u n i t by removing screw 3 24 n u t 3 14 and spring washers 3 23 C a r e f u l l y jjispect a l l c o n t a c t surfaces Silver washers 3 25 and adjacent surfaces should be clean and f r e e o f roughness o r g a l l i n g Lubricate washers 3 25 and mating surfaces by rubbin...

Page 15: ...adjustment should normally be necessary The horizontal pairs of main contact fingers in each phase should make with the moving contact simu1 taneousIy Note Contacts on different phases should not necessarily make simultaneously they can vary as much as 1 32 inches I f not already detached remove pin 1 46 and detach link 1 47 from disconnect arms 3 18 and 0 19 On MA 75 150B and FC 150 250 500 Break...

Page 16: ... contact fingers 3 1 I 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 made by opening or closing the gap with nut 3 1 Adjustment is Reconnect link 1 47 to disconnect arms 3 18 and 3 19 using pin 1 46 4 8 CONTACT STROKE Fig 3 Contact stroke should be checked and adjusted only when the contacts are in proper alignment see Sectio...

Page 17: ...e barrier stack The barrier stack 2 23 consisting of a number of refractory plates with Vee Shaped11 slots cemented together The barrier stack cools squeezes and stretches the arc to force a quick interruption d 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 normal...

Page 18: ...fer After 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 d i Courtesy of NationalSwitchgear com ...

Page 19: ...s are 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 crack...

Page 20: ...O O 13 SCREW CONNECTOR I SCREW T BARRIER I9 _ PIN n Or INK z mi SPRING 39 SCREW r 4 SECONDARf FINGER ASSEMBLY SCREW 3 PIN m NUT PISTON STEM 73 R00 END GUlOE Ti RELAY 21 SHUTTER LANYARO SPRING RELEASE TRIP ROO cn AUXILIARY SWITCH l5 n FOOT LEVER INTERLOCK RELEASE 3l OPENING SPRINGS FIG I TYPICAL MAGNETIC BREAKER PUFFER pLUNGER GROUNOtNG fi LINGERS STOP 3Q GUIOETII JUNE 27 1966 71 401 531 401 ...

Page 21: ...OLER iiJl U 1 BARRIER STACK RUNNER 5 HAIRPIN POLE PIECE 22 i i CHANNEL i J r i c ARC ARC A 4 RUNNER RUNNER I n COIL x COIL REAR r J I 5 2 i i i i WASHER m A 7 ty A 1 FIG 2 TYPICAL ARC CHUTE 71 401 532 401 JUNE 27 1962 ...

Page 22: ...OKE T NUT b I I y i 1 f WASHER WASHERW V S d NUT g SCREW PLATE 6y TUBE l f V VIEW A A ARCING CONTACTS ENGAGING 4 NUT SCREW 3 1 r WASHER Q7 SPRING WASHER 3 O Bj in i SCREW i 24 I n sI y i z 4 J i SILVER WASHER TH in y Z L 25 i NOZZLE B i r VIEW A A BREAKER LATCHED y VIEW B B 2 I I I m i i 73 in i i FIG 3 BREAKER OPF N VIEW A A MAIN CONTACTS ENGAGING TYPICAL STUD a SUPPORT 71 401 524 401 JUNE 13 196...

Page 23: ... Ty CAM SHIMS r SCREW a LOCKWASHER ROLL 54 6 hHE X NUT l MOTOR n 49 SOLENOID TRIP BOLT 24 36 SCREW r SHIMS n25 0 SPRING LATCH s m 3 i 37I43r SCREW 8 NUT L 8 0 r Cr i j N MJ J Oil It 5 V Yr I 1 y 19 14 PIN SHIMS STOP SCREW CLOSING SPRINGS TUBE PLATE NUTS TUBE WASHER FIG 4 TYPICAL STORED ENERGY OPERATOR 71 303 129 4 01 JUNE 20J962 ...

Page 24: ... i 7 V COTTER 2 PIN 1 ROD li 4 y NUT I M II II Pl A U la rtm l it L U u j n x PADDLE i M JUL 1200 A 2000 A s STOP ANGLE f t f i t f t f f i f f r7T7777T7777 m 73 A FIG 4A TYPICAL SPRING DISCHARGE JUNE 29 1967 72 220 161 401 l ...

Page 25: ...PRING 32 8 hSHIMS r 55J ROLL r TRlp 4o A 6 HEX NUT PIN I SCREW 42 n 49 SOLENOID X STOP 3Q SPRING RELEASE 5Q SOLENOID 54 R0LL r TRIP 3 PIN m 9 HATCH 73 U 15 BLOCK HEX NUT 60 FIG 5 OPERATOR ADJUSTMENTS JUNE 27 1962 71 209 564 401 56 ROLL ARM 2 ...

Page 26: ... CONTROL SWITCH CLOSE CIRCUIT I rm j m X jB IA i m U F SWITCHES SHOWN IN THROWN POSITION olfe mu 4 B B ijo A i O ARM 4 z X r s OVERTRAVEL r I N 03 2 S W I TCH 6 88 2 88 1 I i J I 3 Qpmi m 73 ROLL T5 A m m PIN SWITCH R O L L 3 VNUT F I G 8 TYPICAL CONTROL SWITCH JULY 27 1966 72 320 033 401 ...

Page 27: ... RING STUD M A ROTOR ASSEMBLY 7 J BEARING I n 3 ROTOR ASSEMBLY z 8 J BUSHING BARRIER r 9 J SHAFT M 0 M m m M BEARING 2 m 73 10 l CRANK STATIONARY CONTACT j gH ARM U ftj u MOUNTING BRACKET II MOUNTING BRACKET FIG II TYPICAL AUXILIARY SWITCH 71 301 758 JULY 16 1958 ...

Page 28: ...H i IWVWK 12 E t 55 6 i i F BREAKER CLOSING SPRINGS I o 0 SAAAAJ BREAKER OPEN SPRINGS CHARGED z BREAKER CLOSED SPRtNGS DISCHARGED FIG 13 FIG 14 B I 2 A 2 m 3 II a LATCH C A H 4 S W 6 12 K LATCH t TYPICAL OPERATOR LINKAGE DIAGRAM E F 7I IIG 4BI JUNE 1962 S TRIP FREE FIG 15 ...

Page 29: ...NG STUD 4 M in ROTOR ASSEMBLY 7 1 BEARING I n 3 ROTOR s ASSEMBLY x 8 J BUSHING BARRIER a a s 9 I SHAFT M BEARING 3 T n m 73 10 J CRANK STATIONARY CONTACT a s ARM in C 9 L MOUNTING BRACKET II J MOUNTING 7 BRACKET FIG II TYPICAL AUXILIARY SWITCH 71 301 758 JULY 16 1958 ...

Page 30: ... 5 G 7 l LATCH 12 E 9 6 0 F BREAKER CLOSING SPRINGS I n AAAAAJ BREAKER OPEN SPRINGS CHARGED z BREAKER CLOSED SPRINGS DISCHARGED FIG 13 FIG 14 B I 2 A 2 m 3 II 73 LATCH I C U M 4 s 12 K LATCH t TYPICAL OPERATOR LINKAGE DIAGRAM C B F 71 I I6 4 BI JUNE 1962 TRIP FREE FIG 15 ...

Page 31: ...ALLIS CHALMERS 4 m t ir t f n v c X r c A J iT View shows a p p l i c a t i o n o f f i f t h wheel on Type F A i r M a g n e t i c C i r c u i t Breaker 205391 Courtesy of NationalSwitchgear com ...

Page 32: ...ALLIS CHALMERS I Left f r o n t view o f Type F A i r Magnetic C i r c u i t Breaker w i t h Type SE 3 stored energy o p e r a t o r 205399 Courtesy of NationalSwitchgear com ...

Page 33: ...ALLIS CHALMERS i A J V View shows application of manual spring charging handle on Type F Air Magnetic Circuit Breaker 205396 Courtesy of NationalSwitchgear com ...

Page 34: ...f V p 1 r VTw iV r i 205130 205129 Tilting arc chutes Position arc chute support unfasten blowout coil connections and lower end of arc chute tilt arc chutes back on supports Removing Phase Barriers Remove Channels l panel 2 and slide phase barrier assemblies 3 off front of breaker t t I V ...

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