Westinghouse F-122, Instruction Book

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Page 2: ... 8 Mechanical Interlock 8 Mechanical Sequence Interlock 10 16 Mounting of Auxiliaries 8 10 Overload Release 14 Panel Bracket 15 Panel Frame Mounting Bracket 15 Pipe Bracket 15 Pipe Structure 15 Signal Switch and Beii Alarm 10 Tripping Devices 10 Undervoltage Release Attachment 10 12 General Description 3 Installation 3 Insulating Oil o 6 Mounting of Circuit Breaker Units 0 6 Switchboard Breaker Pa...

Page 3: ...ection covering adjustment 5 Operate the circuit breaker by hand several times watching each pole and the operating mechanism to be sure all parts move smoothly and freely 6 When the mechanism is remote mounted adjust the connections between the breaker and operating mechanism so that full contact is obtained and the breaker rests on the bumpers when in the open position 7 Install connections to t...

Page 4: ... Toggl Lever Lmks Set toggle to this dim F Closing Lever Ooer RodEnd Assem foruu __ _ oush ordown 4 puff L_ Assem 11 for down pull operation Stationaryarc shield Tanh LiftRod t icarta il l 1 f t Terminal I I l Bushing Dash Pot IIIH Details FIG 3 BREAKER PoLE UNIT SIDE VIEW CRoss SEcTioN 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 5: ...increase as is the case with plain copper contacts carrying large currents In fitting new contacts it is unnecessary that perfect line contact be obtained With the comparatively soft material silver good contact is obtained after a few operations as the silver flows slightly under pressure If the silver contacts on the moving contacts are replaced use solder of at FIG 4 THREE POLE BREAKER UNIT FRO...

Page 6: ...s Only the highest grade such as Wemco C or other approved oil should be used in the breakers The oil should be new or at least thoroughly reconditioned by means of a filter press or centrifuge In any case before using it should be given a dielectric test which should show a minimum of 22 000 volts preferably 25 000 to 30 000 measured between l inch diameter discs spaced 1 inch apart Before fillin...

Page 7: ... two coil coverplate should be discarded The coverplate can then be mounted as shown in Fig 8 with the coils in place in the coil box The tripping cores can then FIG 6 SINGLE HANDLE 2 COIL COVERPLATE be put in place on the coverplate and tightened Here again if an under voltage release is used it may be placed on the coverplate after it is assembled to the panel by pushing the leads through the cl...

Page 8: ...k out device mounts on the side of the breaker unit and is attached to the breaker frame as shown in Fig 18 It is necessary to replace the standard pin in the breaker operating lever by the special large headed pin supplied with the device It should be observed that the armature moves freely and that with the armature closed the large headed pin has clearance to pass while wit hthe coil de energiz...

Page 9: ...2 Oil Circuit Breakers Arrangement for J pipe mtg hand oper mechanism 14 600 800Amps i I I Arrangement for lj wall mtg Mr l n I I FIG 8 REMOTE CoNTROL MouNTING DETAILS 9 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 10: ...lts clamps the undervoltage release tightly in the proper position After it is completely mounted operate it a few times by hand to see that the movement is free and that it operates properly See Fig 12 The automatic retrieve undervoltage release mounts on the right hand side of the coverplate in a similar manner It is necessary to bolt a reset pin to the trip lever of the coverplate to operate th...

Page 11: ...se Type F 122 Oil Circuit Breakers FIG DouBLE HANDLE 3 COIL COVERPLATE Stortinq ionrJ g FIG 11 DouBLE HANDL 2 CoiL CovitRPLATE FOR MoTOR STARTING EQuiPMENT 11 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 12: ...rang ents the two coil single handle coverplate is used on non automatic or automatic single throw breakers unless special requirements demand the three coil single handle coverplate The double handle coverplate is used with all automatic and non automatic motor starting combination of breakers A special assembly of this double handle coverplate can be used with motor starting combinations It is p...

Page 13: ...e careful to leave it bearing over its entire area The coils are marked with their style number the style number of the series resistor and the voltages and frequencies on which they may be used Reference to these should be made in all corre spondence regarding the device The device is made for use with or without resistor depending upon whether it is desired to trip the breaker by short circuitin...

Page 14: ...l dashpot is attached to the end of the moving core The calibration is then inscribed on the dashpot and is varied by screwing the pot into the cover The time is varied by changing the number of the holes in the bottom of the piston un covered by the cliaphragm Instanta neous tripping is possible because the check valve action of the washer at the time of tripping varies inversely with the amount ...

Page 15: ...n completely opened of angle iron provided with standard third if the running handle is not thrown pipe fittings and holes so that the breaker in within a very limited period of time unit is bolted to the angle iron and the after the starting handle is opened it angle iron is held to the pipe will be impossible to close the running Pipe Structure The pipe structure side without first throwing in t...

Page 16: ...draw it from in front of the running handle pin and allowing the running handle pin to raise as would occur if the running side of the circuit breaker had started to close Thus it is easy to see that it is impossible to close the running side of the circuit breaker until the starting side has been fully closed and has reached its full open 16 position At the opening of the circuit breaker the inte...

Page 17: ...IP COIL CO ECTIO S I I I OJ Di Bkr n co Orer ood Relay 8 lhpCoJ 01rect Tn 0 1 ii JAttachment G r Seriesljold mr Co FIG 26 B ScHE vtATic DIAGRAM oF CoNNECTIONS FOR DIRECT TRIP ATTACHMENT Mounting Surface C 0 0 II I I I 1 r I T 3 Q psol 440112201 110 I 0 I UV I UV II 241 Q l r II II II II 7 II I II 0 Transformer I 0 9 32 Dia 2 Mtg Holes For 1 4 Dia Fil Hd Mach Screws FIG 27 DRILLING PLAN AND OUTLINE...

Page 18: ...MEMORANDA w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 19: ... 3 CONN 119 Ann St HOUSTON 2 TEXAS 507 Dallas Ave HUNTINGTON I W VA 1029 Seventh Ave P O Box 1150 INDIANAPOLIS 2 IND 1560 Stadium Drive JACKSON MICH 120 W Michigan Ave JACKSONVILLE 6 FLA 1520 Prudential Bldg 841 Miami Road KANSAS CITY 6 MO 101 W Eleventh St LOS ANGELES 17 CALIF 600 St Paul Ave REV 7 56 LITTLE ROCK ARK 707 Boyle Bldg 103 W Capitol St LONG BEACH CALIF 2129 Pacific Ave LOS ANGELES 17...

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