S D D S R E' r — .(- -|i S D D S R E GEI-88764F Supersedes GEI-88764E E-T T R TYPES AM-13.8-500-5C AM-13.8-500-5CB AM-13o8-500-5H AM-13.8-500-5HB AM-13.8-500-5HV …

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INSTRUCTIONS ANDRECOMMENDED PARTSFOR MAINTENANCE

GEI-88764FSupersedes GEI-88764E

MAGNE - BLAST CIRCUIT BREAKER

TYPESAM-13.8-500-5CAM-13.8-500-5CBAM-13o8-500-5HAM-13.8-500-5HBAM-13.8-500-5HVAM-13j,8-50Q-5HVBAM-13.8-500-6CAM-13.8-500-6CBAM-13.8-500-6HAM-13.8-500-6HB

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CONTENTSIntroduction . . . .Receiving, Handlingand Storage . .Installation . .Description ofOperation „ .Adjustments . . .General Maintenance .Renewal Parts. . .

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SWITCHGEAR PRODUCTS DEPARTMENT|M

G E N E R A L $r E L E C T R I CP H I L A D E L P H I A , P A.

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www.nationalswitchgear.com

Courtesy of NationalSwitchgear.com

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MAGNE-BLAST CIRCUIT BREAKERAM-13.8-500-5(^) AM-13.8-500-6

Z\ Letter Designation B, C, H, and V, used immedi-ately following the model number indicates basicdesign features.

INTRODUCTIONage, current, and interrupting ratings are neverexceeded*all ratings of the breaker as well as several designvariations, the instructions will be of a generalcharacter and all illustrations will be typicalunlessotherwise specified.

The magneblast breaker is the removable andr % interchangeable interrupting elementused in metal-

clad switchgear to provide reliable control andpro-tection of electrical apparatus and power systems*

The AM-13.8-500 Magneblast Breaker is avail-able with continuous current ratings of 1200 amperesand 2000 amperes in accordance with applicableindustry standards* Refer to the breaker name-plate for complete rating information of any par-ticular breaker. The nameplate also describes thecontrol power requirements for that breaker. Theapplication of a breaker must be such that its volt-

iSince this book is written to include I

PROPER INSTALLATION AND MAINTENANCEARE NECESSARY TO INSURE CONTINUED SAT-ISFACTORY OPERATION OF THE BREAKER. Thefollowing instructions will provide complete infor-mation for placing magne-blastbreakers in serviceand for maintaining satisfactory operation.

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RECEIVING, HANDLING AND STORAGEagainst condensation, preferably by storingit in a warm dry room, since water absorp-tion has an adverse effect on the in-sulation parts. Circuit breakers for out-door metal-clad switchgear shouldbe storedin the equipment only when power is avail-able and the heaters are in operation toprevent condensation.

2. The breaker should be stored in a cleanlocation, free from corrosive gases orfumes; particular care should be taken toprotect the equipment from moisture andcement dust, as this combination has averycorrosive effect on many parts.

30 Unfinished surfaces of rollers, latches etc.,of the operating mechanism should be coatedwith grease to prevent rusting.

If the breaker is stored for any length of time,it should be inspected periodically to see thatrusting has not started and to insure good mechan-ical condition. Should the breaker be stored underunfavorable atmospheric conditions, it should becleaned and driedoutbeforebeingplaced in service.

Receiving and Handling

Each breaker is carefully inspected and packedfor shipment. Immediately upon receipt of thecircuit breaker, an examination should be madefor any damage sustained in transit. If injury orrough handling is evident, a damage claim shouldbe filed immediately with the transportation com-pany and the nearest General Electric Sales Officeshould be notified. i

It is expected that due care will be exercisedduring the unpacking and installation of the breakerso that no damage will occur from careless orrough handling, or from exposure to moisture ordirt. Check all parts against the packing list to besure that no parts have been overlooked.Storage

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IIt is recommended that the breaker be put intoservice immediately in its permanent location. Ifthis is not possible, the following precautions mustbe taken to insure the proper storage of the breaker:

1. The breaker should be carefully protected

These instructions do not purport to cover all details or variations in equipment nor to provide forevery possible contingency to be met in connection with installation, operation or maintenance .further information be desired or should particular problems arise which are not covered sufficiently forthe purchaser’s purposes, the matter should be referred to the General Electric Company.

Should

To the extent required the products described herein meet applicable ANSI, IEEE and NEMA standards;but no such assurance is given with respect to local codes and ordinances because they vary greatly.

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GEI-88764 Magne Blast Circuit Breaker

INSTALLATIONOR MECHANISM UNLESS THE CLOSINGSPRINGS ARE BLOCKED AND THE OPEN-ING SPRINGS HAVE BEEN TRIPPED OPENOR MECHANICALLY BLOCKED.PRECAUTION IS REQUIRED TO PREVENTACCIDENTAL CLOSING OR TRIPPINGo

1. Remove the box barrier and mechanismcover and make a visual inspection to as-certain that the breaker and mechanism isin satisfactory condition,, Check all bearingsurfaces of the mechanism for lubrication.Refer to section on lubrication page 16 andFigure 170

2. Charge the breaker closing springs man-ually using a 5/8" ratchet wrench to turnthe driving eccentric (6) Figure 1. Turningthe eccentric counter clockwise will advancethe ratchet wheel and compress the springs.When the springs have reached the fullycharged position the indicator (1) will read"CHARGED", and the driving pawl will beraised from the ratchet wheel teeth. Ad-ditional turning of the eccentric will notadvance the ratchet wheel.Insert the spring blocking device (10) andmanually discharge the springs against thepins by pushing the manual release button(4) 0 The springs are now blocked and slowclosing of the breaker contacts can beaccomplished by again turning the drivingeccentric with a 5/8" ratchet wrench.During the slow closing operation check toinsure that the mechanism does not stickor bind during the entire stroke, that itlatches securely in the closed position, andthat it trips freely when the manual triplever is operated. At this time, also checkthe following adjustments:

a. Arcing contact wipe (Refer to page 10)b. Primary contact wipe (Refer to page11)c. Primary contact gap (Refer to page11)

DO NOT WORK ON EITHER THE BREAKER

THIS

The closing springs should now be un-blockedo Rotate the driving eccentric untilthe indicator reads "CHARGED" and theratchet wheel does not advance. The springblocking device can now be removed.Connect the test coupler to the circuitbreaker and operate itt electrically severaltimes. Check the control voltage as de-scribed under "CONTROL POWER CHECK"(Page 14).Disconnect the test coupler and replace boxbarrier0

3.

4.i

If the breaker has been stored for a longperiod of time, it is recommended thatthe insulation be checked with a standard60 cycle high potential test.Insulation Test (Page 16).NOTE:is to be given a hi-potential test at 1500volts, remove both the motor leads fromthe terminal connection. Failure to dis-connect the motor from the circuit maycause damage to the winding insulation.Lubricate the silver portion of the ballcontact at the top of the breaker bushingby applying a thin film of contact lubricantD50H47.

5.Refer to

If the breaker secondary wiring

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7. Refer to metal-clad instruction book GEH-1802 for instructions on inserting the break-er into the metal-clad unit 0

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DESCRIPTION OF OPERATION

stored energy type designed to give high speedclosing and opening. The mechanism will operateon a-c or d-c voltage as indicated on the breakernameplate* Closing and opening operations arecontrolled either electrically from the metal-cladunit and remote location, or mechanically by themanual close and trip levers on the breaker. Allsecondary connections from the breaker to the metalclad unit are made through the coupler (1) Fig. 2 .

The Magneblast Breaker has two principal com-ponents; the breaker element and the operatingmechanism:

The breaker element is three similar pole units,each of which includes the current carrying parts,main and arcing contacts, interrupter, and anenclosing barrier system that provides insulationbetween poles, or phases and to ground. The pri-mary connections to the associated metal-cladswitchgear are made through the ball contacts atthe top of the breaker bushings. A spring release interlock, Fig 3 , is provided

to discharge both the closing and opening springswhen the breaker is withdrawn , from or insertedinto the Metal Clad unit. in

The operating mechanism type ML-13 is of the

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Magne Blast Circuit Breaker GEI-88764

23

456

igure 1. (8034475) Spring Blocking Device1. Charge-Discharge Indicator2. Support Bolts3. Driving Pawl4. Manual Close Lever5. Motor6. Eccentric7. Closing Spring

Manual Charging Wrench

8J4I~9

-10mmm-nFuseftSpring Blocking Device

iSSF 12

1Figure 2. (8034473) Left Side View ML-13

Operating Mechanism2 1. Secondary Coupler2. Interlock Switches3. Auxiliary Switch4. Latch Checking Switch5. Switch Cam6. Charge-Discharge Indicator7. Closing Latch Roller8. Power Switches9. Closing Latch

10. Closing Springs11. Motor12. Fuses

3456

Figure 3. (8038805) Spring Discharge Linkage1. Link2. Adjusting Bolt3. Trip Latch Crank4. Discharge Crank5. Adjusting Clevis6. Spring Release Crank

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When the breaker is used interchangeably withtype MS-13 solenoid operated breakers in M-36metal-clad units, fuses (12 ) Figure 2, are mountedon the breaker for protection of the motor andclosing circuit. These breakers are identified by"CTT suffix in the breaker nomenclature.

In cases where breakers with type ML-13mechanisms must match and line up with breakershaving type ML-11 mechanisms the spring chargingcircuit for both mechanisms should be fused withBuss Company Fusetrons as follows:

A positive interlock (3) Figure 4 and interlockswitch (2 ) Figure 2, are provided between thebreaker and metal-clad unit to prevent raisingor lowering of the breaker in the unit while in aclosed position and to prevent a closing operationwhen the breaker is not in either the fully raisedor lowered position. To insure that this interlockwill function during manual, as well as duringelectrical operation of the equipment, both mechan-ical and electrical blocking is provided. If forany reason the closing springs should be dis-charged against the positive interlock the mechan-ism will be jammed and be inoperable. Themechanism can be released and returned to thereset position by pushing in on the trip lever (8)Figure 5. It may require more than normalforce to release the interlock.

A plunger interlock, Figure 14 can be providedwhen required to operate a stationary auxiliaryswitch and/or a rod interlock mounted in themetal clad unit.

:

Cat. No.Cont. Volt. Fuse SizeI:

48v d-cllOv d-c125v d-c115v a-c220v d-c250v d-c230v a-c

FRN 10FRN 4FRN 4FRN 4FRN 2.5FRN 2.5FRN 2.5

10A4A4A

! 4A2.5A2.5A2.5A

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Spring Charging

The mechanism has a high speed gear motor(10) Figure 5, that compresses a set of closingsprings through the action of an eccentric, ratchet,and pawl assembly. The rotary action of the motoris converted to a straight stroke through the eccen-tric (11) Figure 4, and a lever that carries a springloaded driving pawl (3) Figure 1.

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Figure 4. (8038804) Right Side View ML-13Operating Mechanism

Figure 5. (8038803) Front View ML-13Operating Mechanism1. Upper Spring Pin

Latching PawlsPositive Interlock RollerOpening SpringCam ShaftRatchet WheelBearing BlockDriving PawlLower Spring PinDriving Pawl LeverEccentricClosing Spring

2.Auxiliary SwitchOpen - Close IndicatorTrip CoilProp SpringOperation CounterTrip LatchCharge-Discharge IndicatorManual Trip LeverManual Close LeverMotor

1.3.2.4.3.5.4.6.

7. 5.6.8.7.9.

10. 8.11. 9.12. 10.

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The pawl advances the ratchet wheel (6) Figure 4a few degrees each stroke where it is held in pos-ition by the latching pawls (2). When the ratchetwheel has been rotated approximately 180 degreesthe closing springs (12 ) will be fully compressed.As the ratchet wheel continues to rotate, the springload will shift over center and attempt to discharge.After a few degrees of rotation, the closing roller(7) Figure 2, will engage the closing latch (9) andthe compressed springs will be held by the latchuntil a closing operation is required. During thelast few degrees of the ratchet wheel rotation thepower switches (8) are opened and the driving pawlis raised from the ratchet wheel surface. Thisallows the motor and driving mechanism to coastto a natural stop expending all residual energy.

During the time the springs are being com-pressed a relay (17) Figure 6, is energized to hold+he closing circuit open. The relay remainsenergized until the springs are fully charged andthe control switch contacts are re-set.

edTT and the driving pawl is raised from theratchet wheel. The use of the ratchet wrenchprovides for maximum safety in the event thatcontrol power is suddenly restored without warning.In this event, the motor drive will override theratchet wrench and continues to charge the springs.Closing Operation

The breaker can be closed electrically byenergizing the spring release solenoid (15) Figure6, or . manually by pushing the close button (9)Figure 5. In either method the closing latch isrotated from under the closing roller to releasethe closing springs (10) Figure 2. The energyin the springs is used to rotate a cam (16) Figure7 and close the breaker through the operatingmechanism linkage. During the closing operationthe mechanism is trip-free at all times. The break-er is held closed by the closing prop (14) movinginto position under the prop pin (13). During theclosing operation the opening springs (4) Figure 4,are compressed and held ready for an openingoperation with the trip latch (8) Figure 7 bearingagainst the trip latch roller (9).

When the closing operation of the breaker iscompleted and the closing latch is fully reset,

The closing springs may be charged manuallyif control voltage is lost. A 5/8" ratchet wrenchcan be used to rotate the eccentric in a counterclockwise direction until the indicator reads "Charg-

2345

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89101112131415im1617

Figure 60 (8034467) Control Mechanism

7o Power Switches8. Closing Latch9. Closing Latch Shaft

10a Latch Adjusting Screw 16011. Release Coil Bolts12 o Closing Latch Spring

l a Latch Checking SwitchSwitch CamSwitch StrikerSwitch Support BoltsSwitch SupportClosing Latch Roller

13o Latch Monitoring Switch14o Switch Mounting Bracket15o Spring Release Solenoid

Release Coil Support17. Control Relay

203„405a

6a

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by energizing the trip coil (3) Figure 5,or manuallyby pushing the trip lever (8). In each method thetrip latch is rotated off the trip latch roller, per-mitting theoperating mechanismlinkage to collapse. ^The energy stored in the opening springs is’released to provide the required opening speed forsuccessful interruption of the circuit.

the contacts of the latch monitoring switch closesto permit the spring charging motor to be energizedand recharge the closing springs.Opening Operation

The breaker can be opened either electrically

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Fig. 7 (0114C5320) Sectional Side View of Mechanism

18. Stop Plate19. Spring Rod20. Spring21. Spring22. Spring Guide23. Stop Pin24. Main Shaft Bearing25. Cam Shaft Bearing

10. Trip Latch Roller Support11. Crank Shaft12. Cranks13. Prop Pin14. Prop15. Drive Shaft16. Cam17. Check Nut

1. Handle2. Trip Coil Support3. Trip Coil4. Trip Armature5. Prop Reset Spring6. Cam Follower Roller7. Trip Shaft8. Trip Latch9. Trip Latch Roller

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the booster tube (25) across the arc. This airflow assists the arc transfer and interruption byblowing the arc away from the contacts and intothe arc chute. As the magnetic field forces thearc deeper into the interrupter along the divergingarc runners, the field is progressively increasedby the insertion of each additional blow-out coilinto the circuit.

As the breaker opens to interrupt a current, thefirst starts at the arcing contacts (7 & 20)

8, transfers to the arc runner (4 & 8) andthe blow-out coils (5 & 9). This action

arcFigureenergizesintroduces a magnetic field between the pole pieces(11) of the interrupter that forces the arc deeperinto the arc chute (3). At the time the arcing con-tacts part a discharge of air is expelled through

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1 2

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z z 18L Z YAs \194 20Z

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268^ 279 28l10-— 29II ft -t

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1 zIII1 Fig. 8 (0634D0372) Cross Section of Breaker Pole Unit

1. Box Barrier Catch2. Box Barrier3. Arc Chute Side4. Upper Arc Runner5. Upper Blow Out Coil6. Upper Blow Out Core7. Movable Arcing Contact8. Lower Arc Runner9. Lower Blow Out Coil

Lower Blow Out Core

11. Pole Pieces12. Front Bushing13„ Rear Bushing14. Upper Horizontal Barrier15. Main Operating C rank16. Upper Interrupter Support17. Spring Retainer18. Lower Horizontal Barrier19. Operating Rod

20. Stationary Arcing ContactStationary Primary ContactMovable Primary ContactMovable Contact Arm AssemblyCup BearingBooster Tube and PistonFront Vertical BarrierCheck NutConnection BarBooster Cylinder

21.s22.23.24.25.26.27.28.10. 29.

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1GEl-88764 Magne Blast Circuit Breaker

Trip Free OperationThe arc chute has a series of interleaving cer-amic fins, Figure 19. As the arc is forced into theinterrupter it is lengthened in the gradually deep-ening serpentine path between the fins so that theelectrical resistance of the arc is rapidly increasedand its heat is absorbed by the ceramic material.The increased resistance reduces the magnitudeand phase angle of the current and at an earlycurrent zero the arc cannot re-establish itselfand interruption occurs.

If the trip coil circuit is energized while thebreaker is closing, the trip armature will forcethe trip latch (8) Figure 7 away from the triproller (9)and the breaker to re-open. The closing cam (16)will complete its closing stroke and the springswill re-charge as in a normal closing operation.

causing the mechanism linkage to collapse

ADJUSTMENTSAll adjustments should be checked during per-

iodic inspections and whenever it becomes nec-essary to repair or replace parts that have becomeworn or defective while in service. The followingadjustments are listed in the order in which theyare to be checked after removing the box barriersand front cover from the breaker,.

MECHANISM UNLESS THE CLOSING SPRINGS AREBLOCKED AND THE OPENING SPRINGS HAVEBEEN TRIPPEDBLOCKED.PREVENT ACCIDENTAL CLOSING OR TRIPPING.

'•AOPEN OR MECHANICALLYTHIS MEASURE IS REQUIRED TO

Arcing Contact WineDO NpT WORK ON EITHER THE BREAKER OR Refer to Figure 9. Close the breaker until

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-2 2 I2 13\ 3\ \I

4 ( 4\ <b 65 5Primary Contact Wipe

Figure 9A„ "-5" Contact Structure (0114C5320)

i Arcing Contact Wipe

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7

Primary Contact Wipe Arcing Contact WipeFigure 9B0 "-6" Contact Structure (0132C2709)i

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Figure 9 Contact Adjustments10 Stationary Primary Contacts 50 Movable Arcing Contacts20 Movable Primary Contacts 60 Contact Arm30 Buffer Block 70 Throat Baffle40 Stationary Arcing Contacts

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the arcing contacts just touch,determined with the use of a circuit continuitytester such as a light indicator or bell set. Inthis position, the gap between the stationary primarycontacts (1) and the movable primary contact (2)should be 5/16" or greater. This setting has beenmade in the factory and no adjustment is provided.A wipe of less than 5/16" is an indication that thearcing contacts need to be replaced. When makingthis check, see that the movable arcing contact (5)passes between the probes on the upper arc runnerwithout touching. On the "-6” design, also checkfor clearance between the arcing contact (5) andthe slot in the throat baffle (7) during entire strokeof the moving contact assembly.Primary Contact Wipe

This can be Primary Contact Gap

Refer to Figure 10. With the breaker closed,press the manual trip button allowing the breakerto trip open normally. Do not force the contactsopen wider by hand. The gap between the stationaryprimary contacts (5) and the movable primary con-tact (8) measured between the closestpoints, shouldbe 5 1/8" to 5 9/16”. To change this gap, loosenthe check nut (17), Figure 7, and turn the adjustingnut (18) on stud (19). Screwing the adjusting nutdown will decrease the primary contact gap. Tightenthe check nut and re-measure the contact gap(close and trip the breaker before checking themeasurement). Whenever the primary contact gapis changed, the primary contact wipe should berechecked and, if necessary, readjusted.

WHEN WORKING ON THE MECHANISM IN THECLOSED POSITION, KEEP FINGERS CLEAR OFTHE LINKAGE, AS ACCIDENTAL TRIPPING CANCAUSE SEVERE INJURY.

Refer to Figure 9, when the breaker is closedthe stationary primary contacts (1) should risefrom 1/4" to 5/l6". Before checking this dimen-sion be sure the mechanism is re-set so thatthe prop pin (13) Figure 7 is resting on the prop.To obtain the proper contact adjustment, openthe breaker and, referring to Figure 10, loosen thecheck nut (4) and turn the adjusting nut (3). Screw-ing up on the adjusting nut will decrease the primarycontact wipe, down will increase it. Tighten thecheck nut, close the breaker and recheck the wipe.With the primary contact wipe correctly adjusted,the clearance between the contact arm (6) Fig-ure 9 and the buffer block (3) should be 1/16”greater when the breaker is fully closed.

Trip Latch Wipe

Refer to Figure 7. The wipe of the trip latch(8) on the trip roller (9) should be from 3/16"to 1/4". This can be measured by putting a filmof grease on the latch (8), closing the breakerpart way, and tripping. The mechanism has theproper trip latch wipe when the latch rests againstthe stop pin (23). No adjustment is provided anda visual inspection is usually all that is required.If this setting is not correct, look for insufficienttravel of the trip shaft (7).Trip Armature Travel

or

• '1 Refer to Figure 7. The trip armature (4)should have 7/32" to 9/32" travel before the triplatch (8) starts to move. This can be adjusted bymoving the trip coil support (2) and /or by adjustingthe trip armature screw (13), Figure 110 A lockingscrew located behind the trip armature screw mustfirst be loosened. Retighten locking screw aftermaking adjustment.Release Latch Wipe

1 £'

‘! 1,/V,.ySill II Imi2 : 5-6

3II :m4

78

-V ] ssRefer to Figure 6. The wipe between the release

latch (8) and roller (6) should be 3/16" to 1/4".If re-setting is required, loosen, set, and re-tighten adjustment nut and screw (10).Release Latch Monitoring Switch

m f i tiIw

Refer to Figure 6.fully re-set and the latch monitoring switch (13)operated before the motor will start. When the latchis funy reset the clearance between the switchstriker arm and the switch mounting bracket (14)is 1/32" or less, this can be adjusted by bendingthe striker arm.Motor and Relay Switches

The release latch must beFigure 10. (8038802) Adjustable Coupling ForMaking Primary ContactWipe Adjustments

1. Operating Rod2. Operating Rod Pin3. Adjusting Nut4. Check Nut5. Stationary Primary Contacts6. Yoke7. Contact Arm8. Movable Primary Contacts

Refer to Figure 6. With the closing springsblocked rotate the switch cam (2) until the switch

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1 1121314

Figure 11. (8038803) Auxiliary Switch andTrip Coil

Open - Close IndicatorAuxiliary SwitchProp SpringTrip Latch SpringSpring Discharge CrankSwitch ArmCotter PinTrip Coil SupportTrip CoilMounting BoltsTrip LatchLatch Set ScrewTrip Arm ScrewManual Trip Lever

striker (3) has traveled the maximum amount(about 180 degrees rotation of cam). At this pointthe clearance between the striker and the switchsupport (5) should be 1/32” or less. This can beadjusted by loosening the switch support mountingbolts (4) and rotating the support.Interlock Switch Wipe

1.2.f 3.I!4. Figure 12. (8034474) Positive Interlock Switch

1. Positive Interlock Shaft2. Switch Arm3. Switch Support4. Interlock Switch5. Auxiliary Switch6. Switch Support7. Latch Checking Switch8. Switch Arm9. Trip Shaft

1*i 5.ill6.

I I 7.8.9.

10.11.12.13.14.

Ito its maximum travel. Now check the clearancebetween the ratchet tooth and the latching pawl. Theclearance should be approximately equal for boththe driving and latching pawls and not less than.015” in either case.

If adjustment is required for either pawl thesprings must first be fully charged and blocked.Loosen seven motor support bolts (2 ) Figure 1and move entire motor assembly to the rear ifthe clearance is under the minimum at the latchingpawls, and to the front if the clearance is underthe minimum at the driving pawl. Move the motorassembly approximately twice the dimensional in- 0crease required at the pawl. Be certain the

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Refer to Figure 12. With the positive interlockin the reset, or normal position the clearancebetween the interlock switch arm (2) and the switchmounting plate (3) should be 1/32” or less. Thiscan be adjusted by bending the switch arm.Driving Pawl Adjustment

I1 motor assembly is moved straight forward or

rearward and tighten the one bolt on the right sideof the mounting frame first to assure properalignment. After tightening the remaining boltsthe springs should be released and the clearanceagain checked as described above.

Refer to Figure 4. The driving pawl (8) mustadvance the ratchet wheel (6) sufficiently on eachstroke to allow the latching pawls (2 ) to fallinto the ratchet teeth. This should be checked withthe closing spring loadagainst the driving members.With the mechanism unblocked, hand charge theclosing springs with the manual charging wrenchuntil they are slightly more than half charged.Slowly rotate the charging wrench until the drivingpawl has traveled through its return stroke andcheck the maximum clearance between the pawland the ratchet toothc Rotate the charging wrenchuntil the driving pawl has advanced the ratchet tooth

AUXELBARY DEVICES:1'1li %Latch Checking Switch4ill1 Refer to Figure 13. Charge the closing springs

sufficiently to reset the mechanism linkage. Rotatethe trip latch (4) by pressing the manual trip lever

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to open the latch checking switch (2), Allow thetrip latch to reset slowly and determine the pointat which the contacts are made by using a circuitcontinuity tester (light indicator, bell set, etc).The contacts of the latch checking switch shouldjust make when the gap between the trip latch(4) and the stop pin (5) located on the latch rollerlink (7) is 1/16". There should be a minimum of1/64" between the switch arm (3) and the switchsupport (1). To obtain adjustment of the latch check-ing switch, bend the latch checking switch arm

following are recapitulated:a. Primary contact wipe: 1/4" to 5/16".b0 Arcing contact wipe: 5/16" or greater

gap at primary contacts.c. Primary contact gap: 5-1/8" to 5-9/16”.d. Trip latch wipe: 3/16" to1/4”latch resting against stop pin.e. Trip armature travel 7/32" to 9/32".f. Release latch wipe: 3/16" to 1/4".g. Release latch monitoring switch: Max-imum clearance 1/32".

with trip

(3).Plunger Interlock

Refer to Figure 14. With the breaker in theclosed position, the vertical distance "A" from thetop of the plunger bolt (1) to the bottom of thebreaker lifting rail (3) should be 11-7/32" to11- 11/32". To change this adjustment, add orremove washers (2 ).Auxiliary Fuses

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Refer to Figure 15. On breakers with "C"suffix, a set of protecting fuses (10) are mountedon the front of the breaker. These fuses are theprimary protective devices for the closing controlcircuit on those breakers that are used in metal-clad units designed for solenoid operated breakers.!

Inspection and Test

Figure 14. (8034464) Plunger Interlock1. Plunger Bolt2. Washer

i. For ease in reviewing the adjustments, the

12:345678910

Figure 15. (8034471) Driving Elements1. Mounting Bolts2 „ Manual Close Button3„ Eccentric40 Retaining Ring5. Hex Charging Stud6» Driving Link7. Motor Support8„ Retaining Ring90 Motor

10. Fuse

Figure 13„ (0114C5320) Latch Checking Switch1. Switch Support2. Latch Checking Switch3„ Switch Arm4o Trip Latch5o Reset Pin Stop60 Latch Roller7„ Latch Roller Link8. Latch Roller Pin

13

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tangent to the lower surface of the probes on theupper runner0 Proper servicing and lubricationof the breaker and its operating mechanism shouldmaintain thesespeeds and no adjustment isprovided,,

h. Motor and relay switch: maximumclearance 1/32”.

i. Interlock switch: maximum clearance1/32”.

j. Driving and Latching Pawl: minimumclearance to ratchet teeth .015”.

k. Latch checking switch contacts makewhen the gap between the trip latchand the stop pin is 1/16”.

l. Plunger interlock: 11-7/32” to 11- 11/32”2. Check all nuts, washers, bolts, cotter pins,

and terminal connections for tightness.3. Inspect all wiring to make sure that no

damage has resulted during installation, andtest for possible grounds or short circuits.

4. See that all bearing surfaces of the mech-anism have been lubricatedo Refer to thesection on LUBRICATIONo (Page 16 andFigure 17) 0 '

5. Operate the breaker slowly with the manualcharging wrench and note that there is noexcessive binding or friction and that thebreaker can be moved to thefully opened andfully closed positions.

6. See that any place where the surface of thepaint has been damaged is repainted immed-iately.

7. Check the trip coil plunger and the releasecoil plunger to see that they move freely.

Opening and Closing Speeds

The closing speed of the arcing contact of thebreaker should be a minimum of 11feet per second.This represents the average speed of the movablearcing contact from a point 3” before the tip istangent to the lower surface of the probes on theupper arc runner to the tangent position.

The opening speed of the arcing contact shouldbe a minimum of 15 feet per second. This repre-sents the average speed over 3” from the pointwhen the tip on the movable arcing contact is

Control Power Check;

After the breaker has been operated severaltimes with the manual charging wrench and themechanism adjustments are checked as described,the operating voltages should be checked at therelease coil, trip coil, and motor terminals.Control Power for electrical operation of thebreaker may be from either an alternating ordirect current source. The operating ranges forthe closing and tripping voltages as given on thebreaker nameplate, are as follows:

!

i!!!I1IIIIIJ50

| ClosingRange

TrippingRange

NominalVoltageIs

1 30v d-c60v d-c

125v d-c140v d-c250v d-c280v d-c125v a-c250v a-c

1424v d-c48v d-c

llOv d-c125v d-c22Ov d-c250v d-c115v a-c230v a-c

si 2-834 - 50v d-c

80 - 115v d-c90 - 130v d-c

160 - 230v d-c180 - 260v d-c

95 - 125v a-c190 - 250v a-c

11i 60« 701201 14011 951901

If the closed circuit voltage at the terminalsof the coil or motor does not fall in the specifiedrange, check the voltage at the source of power andline drop between the power source and breaker.

When two or more breakers operating from thesame control power source are required to closesimultaneously, the closed circuit voltage at theclosing coil or motor of each breaker must fallwithin the specified limits.

Electrical closing or opening is accomplished byenergizing the closing or trip coil circuit. Controlswitches are provided for this purpose on themetal-clad unit. It is also possible to trip or closethe breaker manually by pressing the manual triplever (8) Figure 5 or the manual close button (9).

i

1•i

111?

I!

GENERAL MAINTENANCESilli l l ievery 2000 operations, or once per year, whichever

comes first. If the breaker is also required tointerrupt fault currents during this period of timeadditional maintenance and replacement of partsmay be necessary.

f j i General

Safe and dependable service from electrical ap-paratus and power systems is contingent upon re-liable performance of power circuit breakers. Toobtain maximum reliability the breaker should beinspected and maintained on a regular schedule.The breakers are designed in accordance with ap-plicable standards which require that they becapable of performing up to 5000 operations for1200 ampere breakers and 3000 operationsfor 2000ampere breakers switching rated continuous cur-rent before any replacement of parts should benecessary*, This requirement is based on thebreakers being serviced, or maintained, at least

BEFORE ANY MAINTENANCE WORK IS PER-FORMED, MAKE CERTAIN THAT ALL CONTROLCIRCUITS ARE DE-ENERGIZED AND THAT THEBREAKER IS REMOVED FROM THE METAL-CLADUNIT.MECHANISM WHILE IN THE CLOSED POSITIONUNLESS THE PROP AND TRIP LATCH HAVEBEEN SECURELY WIRED OR BLOCKED TO PRE-VENT ACCIDENTAL TRIPPING. DO NOT WORKON THE BREAKER OR MECHANISM WHILE THE

i DO NOT WORK ON THE BREAKER OR

Wll

iI fii

14II0- 0 =




for breaks in the insulation.' If there areholes or breaks in the insulation they shouldbe repaired or the part replaced.

Interrupter Removal And Replacement

SPRINGS ARE CHARGED UNLESS THEY ARESECURED IN THAT POSITION BY THE MAIN-TENANCE SPRING BLOCKING DEVICE.Periodic Inspection-

Refer to Figure 16. An arc chute lifter isnormally furnished with the metalclad switchgearfor use in removing and replacing the interruptersof the AM-13.8-500 breakers. When the lifter isnot available an overhead crane or portable hoistmay be used. The arc chute lifter is assembledto the top plate of the breaker as shown in thereference figure using the bolt (5) located betweenthe front and rear bushings. Before assemblingthe lifter on the breaker it is necessary to removethe box barrier.

The frequency of the inspection and maintenanceoperations required should be determined by eachoperating company and will depend on the applica-tion of the breakers and the operating conditions.Factors which should be considered are: Importanceof the breaker to overall plant or system operation;number of operations and magnitude of currentsswitched by breaker; frequency of fault interrup-tions; and the atmospheric conditions in which thebreaker normally operates. Extreme conditionsof dust, moisture, corrosive gases etc., can indi-cate that inspection and maintenance will be re-quired more frequently than every 2000 operations.Very clean dry operating conditions with low currentswitching duty can justify a longer period of timebetween inspections. Any time a breaker is knownto have interrupted a fault at or near its rating it isrecommended that the breaker be inspected andnecessary maintenance be performed as soon afterthe interruption as is practical. The followinginstructions give the items that should be includedin an inspection and general recommendations onthe maintenance of breakers.

3

Interrupters

Since there are no moving parts, the interruptersof a magneblast breaker will normally requirelittle or no inspection unless there is evidenceof damage to the arc chutes sides or contaminationin the throat area. If either of these conditions arepresent the interrupters shouldbe removedfrom thebreaker and the following points noted:

The throat area of the interrupter shouldbe cleaned with sandpaper ‘(Do Not useemery cloth or other metallic abrasives).All flat areas on either side of the movablearcing contact travel should be sanded.Do not sand or otherwise attempt to cleanthe ceramic fins of the arc chute sides orthroat pieces. Heavily contaminated partsshould be replaced.

1.

Figure 160 (8034809) Interrupter PartiallyRemoved Showing Accessibility of Arcing Contacts

1. Handle2. Rear Bushing3. Trolley4. Arc Chute Lifter5. Arc Chute Lifter Bolt6. Grappling Hooks7. Upper Horizontal Barriers8. Upper Interrupter Support9. Lifting Bolt

10. Lower Horizontal Barriers11. Supporting Bolt12. Stationary Arcing Contacts13. Mounting Bolts14. Movable Arcing Contact15. Arc Chute Brace16. Lower Supporting Bolt17. Support Bracket18. Lower Interrupter Support19. Interrupter

2. Cracks which have formed in the fins of thearc chute are to be expected in ceramicmaterials of this type when subjected tothe severe heat of an arc. These cracksdo not interfere with the operation of thedevice in any way and shouldbe disregarded.If the arc chute has suffered any mechanicalinjury due to dropping or accidental striking,resulting in the actual breaking off of fins,replacement will be necessary,broken corners on the exhaust end of thearc chute sides will not interfere with itsperformance and can be disregarded.The plastisol flexible covering for the polepieces (3 & 8) Figure 18 and the uppermounting support (12) should be inspected

3.

Small

4.

15t.



:

JSr


and if dampness is apparent, heaters should beinstalled in the metal clad switchgear to insuredryness.Insulation Test

To remove the interrupter, loosen the two uppersupporting bolts (11) and the one lower supportbolt (16) using a standard 3/4" wrench. Raisethe assembly approximately 3/8" and slide ittoward the rear of the breaker.

To reassemble the interrupter to the breaker,rest the lower interrupter support (18) on thesupport bracket (17). Slide the arc chute forward,lifting it slightly to engage the supporting bolts (11)in the slots of the upper interrupter support (8).On the "-5H" and "-5C" designs check the springbaffle (11), Figure 22, to assure that it closes thegap between the upper insulation (17), Figure 18a,and the back surface of the contact support (4), Fig-ure 22. On the "-6H" and "-6C" design check toassure that the upper insulation (17) Figure 18B,is properly positioned within the barrier suspendedfrom the stationary contact support (9), Figure 23.

Tighten the supporting bolts (11 and 16), Figure16. These bolts serve as both the electrical andmechanical connections between the bushings andthe arc runners within the interrupter. Checkthat the movable arcing contact (14) passesbetween the probes on the upper arc runner (5)Figure 19 without touching.Breaker Contacts

«When insulation has been repaired or replaced,

or when breaker has been operating in adversemoisture conditions, it is recommended that theinsulation be checked before the breaker is placedback in service. A standard 60 cycle high potentialtest at 27,000 volts RMS for one minute will nor-mally indicate whether the breaker is satisfactoryfor service. With the breaker contacts in the fullyopened position, apply the test potential to eachterminal of the breaker individually with all otherterminals and the breaker frame grounded. Afterhigh potential tests are made on organic insulatingmaterials, these materials should be inspected forvisible leakage current paths, and necessary actionmust be taken to repair or replace insulation thatmay have been affected by moisture absorption.

If the breaker secondary wiring is to be givena hi-potential test at 1500 volts, remove both ofthe motor leads from the terminal board. Failureto disconnect the motor from the circuit may causedamage to the winding insulation.Lubrication

Si

•j

IIIII

Hi :!

By removing the box barrier the movable andstationary primary contacts and the movable arcingcontacts can be inspected. The stationary arcingcontacts can be inspected only after removing theinterrupter. If the contacts are burned or pitted,they can be made smooth with a fine file.

After completing inspection of the contacts,check the contact adjustments as specified underADJUSTMENTS.

f In order to maintain reliable operation, it isimportant that all circuit breakers be properlylubricated at all times. Most of the bearings androlling surfaces utilize a new type of dry lubricationthat will require no maintenance and will last thelife of the equipment. Only few bearings and sur-faces listed in the chart, Figure 17, requirelubrication. These have been properly lubricatedduring assembly at the factory, using the finestgrades of lubricants available. However, even thefinest oils and greases have a tendency to oxidizewith age, as evidence by hardening and darkeningin color. Elimination of the hardened lubricantis essential for the proper operation of circuitbreakers. Also frequent operation of the breakercauses the lubricant to be forced out from betweenthe bearing surfaces. A simple lubrication willoften clear up minor disturbances which mightbe mistaken for more serious trouble.

A definite lubrication schedule should be set uptaking into consideration the frequency of operationof the breaker and local conditions.

It is recommended that lubrication of the breakerand its operating mechanism be a part of the per-iodic inspection and maintenance program, with notmore than a two year period between lubrications.It is also recommended that all circuit breakers beoperated at regular intervals, at least once a year,to insure the lubrication is in good condition andthe breaker is operable.

The lubrication chart, Figure 17, is divided intotwo methods of lubrication. The first method out-lines the maintenance lubrication which should beperformed at the time of periodic maintenance, and

!I Mechanism

A careful inspection should be made to checkfor loose nuts or bolts and broken retaining rings.All cam, roller, and latch surfaces should beinspected for any evidence of damage or excessivewear. Lubricate the mechanism as outlined below,then, using the manual charging wrench, open andclose the breaker several times to make certainthat the mechanism operates freely throughout itsentire stroke. Check the mechanism adjustmentsas specified under ADJUSTMENTS,control wiring for tightness of connections anddamaged insulation.Bushings and Insulation

||!

1!In|IIl

111!

tII!f Check the

The surface of the bushings should be kept cleanand unmarred to prevent moisture absorption.If the insulation surface should become damaged,it should be sanded and cleaned, and should berefinished with either clear varnish or clearresin. Allow to dry smooth and hard.

All other insulation parts on the breaker shouldbe kept clean and dry. Smoke or dust collectedbetween inspection periods should be wiped off,

l!

1ftHi 16

m




requires no disassembly. The second method out-lines a lubrication procedure similar to that per-formed on the breaker at the factory, and should beused when a general overhaul of the breaker isnecessary.

General Electric Lubricants D50H15 and D50H47are available in l/41b collapsible tubes,packaged to insure cleanliness and to preventoxidation.

It is so

ALTERNATE LUBRICATION(REQUIRES DISASSEMBLY)

LUBRICATION ATMAINTENANCEPERIOD

PART

No lubricationrequired.

No lubrication required.Sleeve Bearings - links,trip shaft, etc. (Tefloncoated bearings)

Remove bearings orlinks, clean per in-structions and applyD50H15 lubricant liber-ally.

Light applica-tion of machineoil SAE 20 orSAE 30.

Sleeve Bearings - main crankshaft, driving pawl lever.(Bronze or cast iron)

Wipe clean and applyD50H47.

No lubricationrequired.

Contact Arm Hinge AssemblyCup BearingLoose rings between bushingand contact arm.

Light applica-tion of machineoil SAE 20 orSAE 30.

Clean per instructionsand repack with D50H15

lubricant.Roller and Needle Bearings

No lubrication required.No lubricationrequired.

Ground surfaces such ascams, ratchet teeth, etc.(Surfaces coated with MoS2)

Wipe clean andapply D50H15

lubricant.Wipe clean and applyD50H15 lubricant.

Ground surfaces such aslatches, rollers, prop, etc.

Wipe clean and applyD50H47.

Silver plated contacts andprimary disconnect studs.

Wipe clean andapply D50H47.

Do not lubricate.Do notlubricate.

Booster Cylindert

Do not lubricate.Do notlubricate.

Arcing Contacts

Figure 17. Lubrication Chart

17



nGEI-88764 Magne Blast Circuit Breaker

II

i ! exposure to the fumes is sometimes unpleasantto personnel. Washing the bearings in the lightoil, draining and repacking with lubricant D50H15should follow immediately.

METHOD OF CLEANINGBEARINGS

Whenever cleaning of bearings is required, asindicated in the lubrication chart, the followingprocedures are recommended.Sleeve Bearings

The sleeve bearings used throughout the linkageutilize Teflon surfaces and do not require lu-brication. After a number of operations, the sur-face will acquire a thin black film. Do not removethis film unless there is evidence of outside con-taminates, such as dry or hardened grease. Ifcontaminants are present they should be removedby immersing the link and bearing in clean petro-leum solvent, or similar cleaner, and using astiff brush. Do not remove the bearings from thelinks. DO NOT USE CARBON TETRACHLORIDE.

The hinge of the primary contact arm (24)< Figure 8, should be disassembled, cleaned, and

^lubricated with G-E D50H47 lubricant at generaloverhaul periods.

The main shaft bearings (24 ) figure 7 and thebearings in driving pawl lever (10) Figure 4,should be removed, cleaned, and lubricated withG-E D50H15 lubricant at general overhaul periods.Roller and Needle Bearings

Bearings that are pressed into the frame or othermembers such as the motor support (7) Figure 15,should not be removed, After removing the shaftand inner race the bearing can be cleaned satis-factorily with petroleum solvent or a similarcleaner and a stiff brush. Follow the procedureoutlined above using a light machine oil and G-Elubricant D50H15 before reassembling the innerrace and shaft.Rolling Surfaces3

A number of rolling and rubbing surfaces in themechanism have been lubricated with a baked-ondry, molybdenum disulfide coating. This lubrication,which can be recognized by its dark, almost blackcolor (e.g. Face of switch cam (5) Figure 2) re-quires no maintenance and should last the life ofthe breaker.

Other rolling or rubbing surfaces that are notlubricated with molybdenum disulfide should havethe dried, dirty grease removed and a thin filmof fresh lubricant D50H15 applied.

n1

i

I

MAINTENANCERefer to Figure 7. The cam follower bearings

(6),latch roller bearing (9), and cam shaft bearings(25) should be removed from the mechanism andthe inner race disassembled. They should then beplaced in a container of clean petroleum solventor similar cleaner.TETROCHLORIDEohas become badly oxidized, it may be necessary touse alcohol (type used for thinning shellac) toremove it. Ordinarily, by agitating the bearings inthe cleaning solution, and using a stiff brush toremove the solid particles, the bearings can besatisfactorily cleaned. Do not handle the bearingswith bare hands as deposits from the skin onto thebearings are inductive to corrosion. If the bear-ings are touched, the contamination can be removedby washing in alcohol. After the bearings have beenthoroughly cleaned, spin them in clean new lightmachine oil until the cleaner or solvent is entirelyremoved. Allow this oil to drain off and the repackthem immediately with G-E lubricantD50H15 beingsure all metal parts are greased. The inner racesshould then be assembled.

# •>Magne-Blast breakers used for switching arcfurnaces or capacitors will require more frequentand more detailed inspection and maintenancebecause of the repetitive nature of the applications.The following schedule is recommended for suchbreakers:

DO NOT USE CARBONIf the grease in the bearings

Every 500 Operations, or Every Six Months-Whichever Comes First:

A.;! 1. Remove the box barriers.1 1If

2. Wipe all insulating parts clean of smokedeposit and dust with a clean dry cloth,including the bushings, and the insideof the box barriers.

3. All flat parts in the throat area of theinterrupters should be thoroughly clean-ed by using sandpaper. This cleaningshould be performed any time the inter-rupter is removed, The arc chute sidesand throat cooler fins should not becleaned. Whenever the interrupter isremoved, loose dust and dirt shouldbe blown out before replacing arcchutes.heavily contaminated should be replaced.

B. Every 2000 Operations, or Every Six MonthsWhichever Comes First:

NOTE: If it becomes necessary to clean thebearings in alcohol (shellac thinner), be surethe alcohol is perfectly clean, and do not allow thebearings to remain in the alcohol more than a fewhours. If it is desirable to leave the bearings inthe alcohol for a longer time, an inhibited alcoholsuch as is used for anti-freeze should be used.Even then the bearings should be removedfromthealcohol within twenty-four hours. Precautionsagainst the toxic effects of the alcohol must beexercised by wearing rubber gloves and by usingthe alcohol in a well ventilated room; excessive

Throat coolers which areI

In addition to the servicing done each500 operations, the following inspection

1.Hi

18n

i




should be made and work done whenrequired.

2. Primary Contacts (3 and 10 Figure 23).Inspect the condition of the stationarycontact fingers and movable contactblocks. Badly pitted or burned contactsshould be replaced. (Note: Burnedprimary contacts indicate the probableneed for arcing contact replacement.)If the contact surfaces are only rough-ened or galled, they should be smoothedwith crocus cloth or draw filed. Aftercontact dressing the primary contactsshould be greased lightly with D50H47.

3. Arcing Contacts ( 7 and 20 Figure 8).When the arcing contact wipe is lessthan the minimum specified under AD-JUSTMENTS, the contacts should bereplaced.inspected for uneven wear and/or dam-age using a mirror to inspect thestationary contacts. Normally it willnot be necessary to remove the inter-rupters for this 2000 operation ser-vicing unless inadequate wipe or con-tact condition indicate a need for re-placement. If the interrupters are re-moved, the contact braids, and otherparts subject to arcing should be check-ed for possible cleaning or replacement.Do not grease the arcing contacts underany circumstances/

to the fully opened and fully closedpositions,should then be checked using either thetest cabinet or the test couplers.

C. After Every 10,000 Operations:In addition to the servicing done each2000 operations, the interrupters shouldbe removed from the breaker and dis-assembled to permit a detailed inspec-tion of insulation, blow-out coils, arcrunners and assemblies which canbecome contaminated by arc products0

The blow-out coils should be carefullyexamined and if the insulation has beencracked, shrunk or eroded from arcaction and heat so that the turns of thecoils are not fully insulated from eachother, the coils should be replaced. Allconnections should be checked fortightness.The arc runners should be inspectedand replaced when any part of theirarea has been reduced to 25% of theoriginal metal thickness as a resultof arc erosion. On arc runners witharc resistant surface coating, replacerunner when surface coating has beenpenetrated.

Its electrical operation

1.

2 .

The contacts should be

3 «

4. Check the stationary arc contacts toassure that the arcing contacts are ingood condition and that their connectionsare tight.Insulating *. material that is carbonizedand cannot be satisfactorily cleanedshould be replaced.Any parts damaged or severely burnedand/or eroded from arc action shouldbe replaced.

4. Check the breaker and mechanism ad-justments as summarized under IN-SPECTION AND TEST. The necessaryreadjustments should be made as de-scribed under ADJUSTMENTS. 5.

5. The breaker and operating mechanismshould be carefully inspected for loosenuts, bolts, retaining rings, etc., allcam, latch and roller surfaces shouldbe inspected for damage or excessivewear. The buffer blocks and theirretainers on the bottom of the stationarycontact support should be inspectedforpossible need of replacement.

6. The contacts of the control relay (17)Figure 6, should be inspected for wearand cleaned if necessary.

7. Lubricate the breaker operating mech-anism in accordance with instructionsunder LUBRICATION,page (16) and thelubrication chart Figure 170

8. Inspect all wiring for tightness of con-nections and possible damage of in-sulation.

6.

NOTE: Fine cracks may develop in thefins of the arc chute sides. This is tobe expected with ceramic materialswhen subjected to the high heat of anarc and may be disregarded unlessthey are long and present a possibilityof fin sections breaking completely off.Small brpken corners on the exhaustend of the arc chute will not interferewith its performance and can alsobe disregarded.The cup bearing and the contact ringat the hinge point of the contact bladeshould be disassembled , inspectedcleaned, and relubricated with G^Econtact lubricant D50H47. The contactring should be inspected for wear andreplaced when reduced in thickness toless than1/32”. When reassembling thecup bearing, be sure the cotter pin isproperly assembled in the castle nut

7.

9. After the breaker has been serviced,it should be operated manually to besure there is no binding or frictionand that the breaker contacts can move

19

j




on the hinge pin (7) Figure 23. Thisassures proper contact pressure at thehinge.

Every 20,000 operations or ApproximatelyEvery Five Years - Which ever comesfirst:

1. Remove the assembly bolts (2,6,9,11,13,16and 19), Figure 18.

Remove the side brace (7), and rear brace(5), the upper pole pieces (3), the lower polepieces (8), and the rear muffler assembly

D. 2. -The breaker should be given a generalinspection and overhaul as required.All excessively worn parts in both themechanism and breaker should be re-placed. Such wear will usually beindicated when the breaker cannot beadjusted to indicated tolerances^, Thisoverhaul and inspection is more detail-ed andwill require disassembly of mech-anism and breaker operating parts.All roller and needle bearings in theoperating mechanism should be dis-assembled, cleaned, and repacked withG. E. lubricant D50H15 as describedunder LUBRICATION.

1. (4).!

To remove the upper supports (12), andupper interrupter support (15) remove theassembly bolts (1 and 14), and the boltedconnection between the upper interruptersupport and the blowout coil.Remove the assembly bolt (22) to remove thelower brace (10).Remove the lower interrupter support (20)by removing the assembly bolts (21) Figure18 and the connection nut (7), Figure 20.At this point, the side shields (4), Figure 20,and the upper arc runner assembly (2) canbe removed. On the "-6" design the throatcoolers (8) Figure 19b, are permanentlyaffixed to the side shields„

Further disassembly of both the upper andlower arc runner assemblies can be done byremoving the various screws and assemblybolts (not illustrated) as shown in Figure 19.The arc chute sides (6) Figure 19, can alsobe separated for inspection.On the "-6" design, do not disassemble themuffler assembly (4) Figure 18.

3.

4.2. 5.

i

6.j

3. The stationary primary contactfingers(3) Figure 23, should be disassembledand the silver-plated pivot area of thecontact and contact support cleanedand lubricated with G-E lubricantD50H47. 7.

4. The breaker and operating mechanismshould be serviced as described forevery 2,000 operations and properlyadjusted before being put back intoservice.

8.

9.REPAIR AND REPLACEMENT

This section covers the proper method ofremoving and replacing those parts of the breakersubject to damage and wear that may require repairor replacement at the installation. IMPORTANT:UPON COMPLETION OF ANY REPAIR WORK, ALLBREAKER AND MECHANISM ADJUSTMENTS MUSTBE CHECKED.STALLATION, paying particular attention to AD-JUSTMENTS and FINAL INSPECTION.

Reassemble the interrupter in the reverseorder.The following items should be noted during re-assembly:

1. The fins of the arc chute sides should beequally spaced and aligned before boltingtogether. The front edge (along the runner)of the two arc chute sides shouldbe parallel

and inline.The gap between the fins at the rear of thearc chute sides measuredat least1"in fromthe back end of the arc chute (See Figure21) shouldbe 3/64" to 3/32"on the"-5" de-sign and 0 to 1/16" on the "-6" designinterrupter.Check to insure that electrical connectionsto the blowout coils' are tight.When reassembling the arc runner as-semblies, check that the spacers (1and 11),Figure 19, are correctly installed.Before bolting the upper supports in place,make certain that the upper arc runnerassembly is tight against the arc chuteside so that the gap between the upperinsulation (7), Figure 19, and the arc chute

Refer to the section on IN-!i

ARC CHUTE (To inspect or replace blow-out coilsand arc runners):

With the breaker open and the closing springsin the blocked position, remove the box barriers(2 ), Figure 8.assembled to the breaker and the interrupterremoved as describedunder ARC CHUTE REMOVALAND REPLACEMENTpage 15.

To disassemble the arc chute after it has beenremoved from the breaker, proceed as follows:

NOTE: When disassembling the arc chute andits components some smaL washers, spacers, etc.,will be found that cannot be identified in theseinstructions. Care should be taken to collect andidentify these items so they can be reassembledcorrectly.

2.

*The arc chute lifter can now be

3.i

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l l5.

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v 20

i




1 122Assembly BoltsAssembly BoltUpper Pole PiecesMuffler AssemblyRear BraceAssembly BoltSide BraceLower Pole PiecesAssembly BoltLower BraceAssembly BoltsUpper SupportAssembly BoltsAssembly BoltUpper Interrupter SupportAssembly BoltsUpper InsulationSide ShieldAssembly BoltsLower Interrupter SupportAssembly BoltsAssembly Bolt

1. 13I| 142 . 15

3.I 16£1 4.m 135.I 36. 177.

/ % /58.9.

10. 18

11.|; jyBii12.13.

814.15.16.17.

%18.1 2119. 229 &20. 1021. n22.

Fig. 18A (8036083) ”-5TT DesignFig. 18 Interrupter Assembly

Fig. 18C (8039512) LATER "6" DesignFig. 18B (8038702) EARLY "-6" Design



]I

GEI-88764 Magne Blast Circuit Breakert

w:

Upper Arc Runner SpacersUpper Arc Runner AssemblyBlowout CoreBlowout CoilUpper Arc RunnerArc Chute SideUpper InsulationThroat CoolerLower Arc RunnerLower InsulationLower Arc Runner SpacersLower Arc Runner AssemblyLower Coil Connection

1.s

2.t 3.4.5.6. R.

7.8.9.

10.11.12.i13.

Fig. 19A (8021965)Fig. 19 Interrupter Assembly with Side Removed

itIJ

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1«3

2B

3©

vym45

— 678

1II n w:- 1 9

ft 10§am &

11ISIII! ac 12©fill111 13

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Fig. 19B (8038701) "-6" Design Fig. 19C (8039510) LATER"-6" Design

III ) 22I



IS

IMagne Blast Circuit Breaker GEI-88764

IIi

sides (6) is a minimum,design the throat coolers should fee as-sembled tightly against the arc chutesides.Make certain that the electrical connectionsare tight.

On the "-6"cof-cco

6.a.CL3CO

Reassemble the arc chute on the breaker asdescribed under ARC CHUTE REMOVAL ANDREPLACEMENT, page 15,

o2

Q ro CONTACTSI

cr ^ Open the breaker and remove the box barriersand interrupters as previously described. Toremove the contacts, proceed as follows:

A. Stationary Arcing Contacts (10), Figure 22.1. Disconnect the contact braids (7) from

the contact fingers by removing twobolts and locking plates (8).

2. Grasp the lower end of the contactfingers with pliers and pull contactassembly downward to remove fromstud assembly.

3. To disassemble braids from stud plateremove one bolt (5).

4. To disassemble stud platefrom contactsupport, remove two bolts (6).

5. Reassemble in the reverseorder, makesure locking plates are properly re-assembled with bolts (8) .

B. Movable Arcing Contact (14) Figure 23e

1. Remove the assembly bolts (12) makingnote of quantity and location of shimsand spacers used between contacts andcontact arms.

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Figure 20. (8029831) Interrupter Assembly1. Upper Support2. Upper Arc Runner Assembly3„ Upper Arc Runner4. Side Shield5. Lower Arc Runner Assembly6. Lower Coil Connection7. Connection Nut

2. Reassemble in reverseorder, re-usingthe shims and spacers.Close the breaker slowly to checkthat the movable arcing contact isapproximately centered on the station-ary arcing contact and that it doesnot rub on either side of the throatbarrier (9).

NOTE: Whenever it is found necessaryto replace arcing contacts on any poleof a breaker it is recommended thatboth the stationary and movable con-tacts on that pole be replaced at thesame time.

3.

Figure 21. (8029373) Arc Chute Fin Spacing

23




Open spring compressor (3) and as-semble spring guide, spring and springcompressor (Figure 24A)e

Turn nut (2 ) in clockwise direction tocompress contact spring (Figure 24B).Hold spring firmly in yoke on springcompressor to prevent spring fromslipping out of the compressor.Place washer (not shown) on guide ontop of spring, place top of guide intohole in spring retainer (4) and theround end of spring guide in cutout inprimary finger (Figure 24C)c

Hold spring assembly firmly in placeand remove spring compressor.

2.J •:

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I3.

2

34.

4

5 wI 6 5.1'

I8 m W- -

9101

11

212 3456Figure 22. (8025170) Rear Bushing Assembly

Rear Bushing2. Guide and Support for Interrupter30 Bolts for Contact Support4. Contact Support5. Bolt For Flexible Braid

Mounting Bolt7. Flexible Braid

Connection Bolt9. Stud for Mounting Arcing Fingers

Stationary Arcing Contact AssemblySpring BaffleInsulating Plate

7! 1,

8 )!

9'

. 1

106. 11128.

1310.li.

1412.

15i

C. Stationary Primary Contacts (9), Figure 24.1. Compress the contact spring (6) by

use of the spring compressor.2. Remove spring and spring guide (1).30 Raise the contact finger to clear the

primary contact stop plate (8) and liftthe finger out of contact support (7) .Remove one contact finger at a time.

To replace theStationary Primary Contacts:1. Apply a thin coating of D50H47 grease

on the hinged edge of the finger (9) thenplace it on the contact support (7) sothat it is retained by stop plate (8).

SI Figure 23. (8038805) Contact Assembly1. Front Bushing2. Contact Springs3. Stationary Primary Contacts4o Operating Rod Pin5o Buffer6. Cup Bearing7. Hinge Pin8. Contact Arm9. Throat Barrier

10. Movable Primary Contacts11. Assembly Bolts12. Assembly Bolts13. Piston Assembly

, 14. Movable Arcing Contact15. Connection Bar

1?

w

24I

M



•

Figure 24B (8034465)Figure 24A (8034466)

Figure 24C (8034469) Figure 24D (8034468)

Figure 24. Method of Installing Primary ContactSprings Using a Spring Compressor

6. Spring2. Compressor Nut 7. Contact Support3. Spring Compressor 8. Stop Plate4. Spring Retainer 9. Stationary Primary

Finger

1. Spring Guide

5. Assembly Bolts

25

_i




D. Movable Primary Contacts (10), Figure 23.To replace the movable primary con-tacts on a 1200 ampere breaker proceed as

follows:

this alignment be maintained to insure interchange-ability of the breakers in the metal-clad units. Itis, therefore, recommended that the bushings beremoved and reassembled one at a time. Also,before removing any one bushing, measure the dis-tance from that particular bushing to adjacentbushings in both directions, so that it may bereinstalled in the same location.

I

Disassemble nuts from assembly bolts(11) and remove the movable primarycontacts (10).Reassemble in reverse order.

1.

However, it is possible to remove and re-assemble three bushings at one time. If this ispreferred, alignment of the bushings may beaccomplished by placing the breaker in a de-energized spare metal-clad unit before tighteningthe bushing mounting bolts. This must be donebefore the interrupters are reinstalled.To replace the bushing, proceed as follows:

Rear Bushing

2.To replace the movable primary con-tacts on a 2000 ampere breaker it is first

necessary to disassemble the movable arc-ing contacts, then proceed as follows:

Disassemble operating rodpin (4), firstnoting quantity and location of washersin the assembly.Pry contact arms (8) apart enough todisengage pivot pins of piston assembly(13) allowing piston to drop down intoits booster cylinder.Rotate the two parts of the contact armassembly away from each other so as-sembly bolts (11) are accessible andmovable primary contacts (10) can beremoved.

1.

Open the breaker and remove the boxbarriers and interrupters as already de-scribed.

1.2.

2. Remove the upper and lower horizontalbarriers (14 and 18), Figure 8.Remove the four bolts at the mountingflange of the rear bushing being removedand lower the bushing assembly.

3.3.

I?NOTE: Shims may be found between thebreaker mounting plate and the bushing ^mounting flange on some, or all bolts. AThese shims are for squaring up the bushingand may be required when new bushings areassembled.

4. Reassemble in reverse order.E. Contact Arm Assembly (8, 10, 13, 14,

Figure 23).1. Remove connection bar (15)

2. Disassemble hinge pin (7) cup bearing(6), and operating rod pin (4)quantity and location of any washersand spacers used in assemblies.

3. The contact arm assembly including thepiston assembly (13) can now be re-moved.

4. Referring to Figure 24, disassemble theprimary contact springs (6) as previouslydescribed.Disassemble the spring retainer (4) byremoving mounting bolts (5).Referring to Figure 22, disassemble thecontact support (4) and interrupter mountingbracket (2 ) removing two bolts (3).Reassemble in the reverse order. Theinterrupter mounting bracket (2) is not ^symmetrical and must be assembled cor- flj;rectly to orient the interrupter properlyon the breaker. The longest projection ofthe bracket should be toward the lower endof the bushing.

noting

5.5

6.i.I

When reassembling, first insert pistontube assembly (13) into the boostercylinder and reassemble the cup bear-ing, making sure the silvered contactwashers between the bushing and con-tact arms (both sides) are in place.Reassemble operating rod pin (4) andconnection bar (15).

After disassembly and reassembly of anycontacts, check all contact adjustments asdescribed under ADJUSTMENTS.

4.7.

;

5.5

Front Bushing

1. Open the breaker and remove the boxbarriers and interrupters as already de-scribed.

2. Remove the upper and lower horizontalbarriers (14 and 18) Figure 8.

3. Remove the connection bar (15), Figure

F.

BUSHINGS

IMPORTANT:BUSHINGS AT ONCE,carefully aligned with the breaker frame, duringassembly at the factory, and it is important that

DO NOT REMOVE ALL SIXThe bushings have been

M!i 26!it i

d




23, cup bearing (6) and hinge pin (7).Remove the four bolts at the mountingflange of the front bushing being removed,and lower the bushingo (See note underrear bushings concerning use of shims).When reassembling, first mount the bushingand assemble the cup bearing (6) contact arm(8) and replace pin (7) being sure thesilvered contact washers between the bush-ing and contact arms are in place. Thecontact surfaces at the hinge point of thecontact blade and bushing should have a thincoating of D50H47 grease.Check all contact adjustments as outlinedunder ADJUSTMENTS.

2. Disengage trip latch spring (4).3. Remove three (3) cotter pinsfrom tripshaft.4. Remove trip arm screw (13) and trip latch

set screw (12).5. Place a block between the trip latch (11)

and the left side of the mechanism frame.Drive the trip shaft to the left until thelatch is free of the key, then remove the key.

6. Check for and remove any burrs raisedaround the keyway on the shaft to avoiddamaging the trip shaft bearings.

7. Shaft, latch, etc., may now be removed bydriving it to the left. Note quantity andlocation of washers used as spacers in theassembly.

8. Reassemble parts in reverseorder. Be suretrip latch is aligned in center of trip latchroller and that the latch spring is properlyinstalled. Check latch adjustment as de-scribed under ADJUSTMENTS.

TRIP LATCH ROLLER BEARING

4.

5.

6.

INTERLOCK SWITCH

To remove the interlock switch (4), Figure 12,remove the two mounting screws and disconnectthe lead wires. Reassemble in the reverse orderand check the switch adjustments as explainedunder ADJUSTMENTS.LATCH CHECKING SWITCH

To remove the latch checking switch (7), Figure12, (when furnished), remove the two mountingscrews and disconnect the lead wires. Reassemblein the reverse order and check the switch adjust-ments as explained under ADJUSTMENTS.MOTOR, RELAY AND LIGHT SWITCHES

1. Remove (2) cotter pins at ends of trip latchroller shaft (8) Figure 13.

2. Partially remove shaft out right side offrame until latch roller (6) is free.

3. Reassemble in reverse order with properspacing of washers. Be sure latch rollerrotates freely.

CLOSING LATCH

Two or three switches (7) Figure 6, are mountedin tandem as required by the application.

Remove the opening spring per instructionsbelow.Remove (2) mounting bolts (4) from switchbracket (5).Remove the (2) mountingscrews of the lowerswitch.Remove the (2) mounting screws of the centerswitch.Remove the (2) mounting screws of the upperswitch.

1.1. Remove cotter pins at both ends of closing

latch shaft (9) Figure 6.Remove spring and paddle (12).Remove set screws from latch (8).Move shaft (9) to left (away from frame) bytapping lightly on the inside end of shaft.Rotate shaft and continue tapping until shaftis free. Shaft will push outside needle bear-ing from housing.Reassemble in reverse order puttingbearinginto frame last. Use asmallpiece of tubingor pipe when inserting bearing to assureproper alighment.Check closing latch adjustments asscribed under ADJUSTMENTS.

2.2.

3. 3.4.

4.5.

5.6. Disconnect the lead wires of switch to be

replaced.7. Reassemble in the reverse order and check

switch adjustment as explained under AD-JUSTMENTS. 6. de-

TRIP SHAFT AND LATCH (See Figure 11) MOTOR SUPPORT

1. To remove motor support (7) Figure 15.first remove the closing latch spring (12)Figure 6.

Remove spring discharge crank (5), manualtrip lever (14) and if furnished, the latchchecking switch operating arm (6) from thetrip shaft.

1.

27



r!

GEI-887d4 Magne Blast Circuit Breaker

Remove the retaining ring (4) Figure 15,and driving link (6).Remove motor leads from the terminalboard.Remove six 3/8" bolts (1) Figure 15, onbottom and one 3/8" bolt on the right side(not shown).Remove four mounting bolts from motor(not shown).Remove the retaining ring (8) from theeccentric (3).Reassemble all parts of the motor supportin the reverse order and re-align it properlyas described under DRIVING PAWL AD-JUSTMENTS.

bolting support (8).Adjust coil location to allow approximately1/4" of armature travel before latch startsto move.

2.5.

30

4. 6„ Butt connect wires and check operation ofsolenoid electrically and mechanically.

SPRING RELEASE COIL5.To remove the spring release coil (15) Figure

6, proceed as follows:

Block the closing springs as described inINSTALLATION.

6.1.

7.2. Remove the left hand closing spring as

described in CLOSING SPRINGS below.3. Remove two mounting bolts (11), coil support

(16), and spacers.Cut wires at the butt connectors and removecoil.

CAM

1. Remove 2 set screws from ratchet wheel(6) Figure 4 and remove wheel from mainshaft (5).

2. Remove 2 set screws from switch cam (5)Figure 2.

3. Remove prop reset spring (4) Fig. 5.4. Remove 2 set screws from cam (16), Figure

7, and move cam to the right on the shaftas far as it will go. Slide the shaft to theleft until key is fully exposed. Remove keyand check shaft for burrs.

5. Remove shaft out left side of frame.

4.5. Replace the coil and the correct number of

fiber spacers before bolting support.6. Butt connect wires and check that the arm-ature is not binding,

electrical operation. Check coil for

CLOSING SPRINGS f>The closing springs (12) Figure 4, can beremoved as follows:

1. Charge the springs with the manual charg-ing wrench and apply the spring blockingdevice as described in INSTALLATION.Discharge springs by pushing manual closebutton (9) Figure 5.Rotate cam shaft (5) Figure 4, by using themanual charging wrench until the gap be-tween the spring (12) and the bearing block(7) is 2 inches or more.Lift both springs until they clear the: lowersupports, then pull forward and down untilthe top supports are free.Either discharge the opening springs bypushing the manual trip lever or blockthe opening springs with a suitable blockingdevice.

6„ Reassemble in reverse order using the cor-rect number of washers and spacers to pro-perly locate the parts.7. Rotate the mechanism through a closing

operation using the manual charging wrench.Check the location of the cam follower (6),Figure 7, on the cam (16). If necessary,move the cam to correct the alignment.Complete the closing operation and check thelocation of the prop pin (13) ontheprop (14).It should be approximately centered.

2.

3.

4.I TRIP COILI ;

5.I I . : To replace the potential trip coil (9), Figure 11,proceed as follows:

With the breaker in the openposition, removethe two mounting bolts (10).Remove trip coil support (8) and spacers.

hi1.

OPENING SPRINGS.

2. , To remove the opening springs (4) Figure 4,proceed as follows:

1. Charge and block the closing springs asdescribed under INSTALLATION.

2. Push manual trip lever (8) Figure 5, to be

||30 Cut wires at the butt connectors and remove

coil. aw4. When replacing the coil be sure to assemble

the correct fiber spacers at the ends before

28Ii

i




4. After reassembling springs check the opengap at the primary contacts as describedunder PRIMARY CONTACT GAP.

sure the opening springs are fully dis-charged.Remove upper pin (1) Figure 4, and lowerpin (9).

I

RENEWAL PARTSIt is recommended that sufficient renewal parts

be carried in stock to enable the prompt replace-ment of any worn, broken, or damaged parts. Astock of such parts minimize service interruptionscaused by breakdowns, and saves time and expense.When continuous operation is a primary consider-ation, more renewal parts should be carried, theamount depending upon the severity of the serviceand the time required to secure replacements.

Renewal parts whiclj are furnished may not beidentical to the original parts since improvementsare made from time to time. The parts which arefurnished, however, will be interchangeable.

NOTE: The listed terms "Right" and "Left"apply when facing the mechanism end of the breaker.

ORDERING INSTRUCTIONSi

1. Always specify the complete nameplate dataof both the breaker and the mechanism.

2. Specify the quantity, catalog number (iflisted), reference number (if listed), anddescription of each part ordered, and thisbulletin number.

3. Standard hardware, such as screws, bolts,nuts, washers, etc., are not listedshouldbepurchased locally.

4. For prices, refer to the nearest office ofthe General Electric Company.

1

PARTS RECOMMENDED FOR NORMAL MAINTENANCE

In the following tabulations are listed those parts of the breaker and operating mechanismwhich are usually recommended for stock for normal maintenance. Other parts are list-ed in Renewal Parts Bulletin GEF-4429.

1

1Ii

1

29



i GEI-88764 Magne-Blast Circuit Breaker

RECOMMEND RENEWAL PARTS FORTYPE ML-13 STORED ENERGY MECHANISM

USED FOR AM-13.8-500-5 (*) & -6 (*), 1200 & 2000 AMPERE(*) SUFFIX LETTERS - H, C, B, R, V)

ii :

?!

No.i ; ! Ref.Fig Catalog No.DescriptionReq'dNo.No.10 15 Spring Charging Motor - **

48 V-DC110 & 125 V-DC & 115 V-AC, 60 Hz220 & 250 V-DC & 230 V-AC, 60 Hz

0105C9393P0010105C9393P0020105C9393P003

Relay - ** ,48 V-DC110 & 125 V-DC220 & 250 V-DC115 V-AC, 60 Hz230 V-AC, 60 Hz

17 160137A7575P0040137A7575P0010108B1978G0010137A7575P0050137A7575P002

3 1 Potential Trip Coil - **110 & 125 V-DC220 V-DC250 V-DC115 V-AC, 60 Hz230 V-AC, 60 Hz

24 V-DC48 V-DC

5006174582G001006174582G015006174582G002006174582G013006174582G032006275070G001006275070G002

Spring Release Coil - **110 & 125 V-DC220 V-DC250 V-DC115 V-AC, 60 Hz230 V-AC, 60 Hz

48 V-DC

6 15 1006174582G001006174582G015006174582G002006174582G010006174582G014006275070G002

0456A0866P0050456A0866P006

Switch, Normally OpenSwitch, Normally ClosedAuxiliary SwitchClosing Latch SpringProp SpringDriving Pawl SpringLatching Pawl Spring - (p

6 576 17

1 150161A4231P0010137A9252P0010161A4241P0010161A5909P001

6 12 14 1584 1

24 2

** Refer to breaker nameplate or summary for proper voltage rating.# Quantity Two (2) relays required on special control circuits. Check

breaker and connection diagram.(j) Furnish 0161A4241P001 for breakers without closing spring discharge

mechanism.Relays on Early "-5" design.0137A7575P043 - 48V-DC0137A7575P042 - 110V-DC & 125 V-DC0137A7575P041 - 220V-DC & 250 V-DC0137A7575P045 - 230V-AC, 60 Hz0137A7575P047 _

115V-AC, 60 Hz

Sfoi , r

ill!

i i

111'

it ^ Refer to breaker auxiliary switch for proper modelType SBM - 0137A9192G003Type SB-12- 0137A9192G011

|

30

L




RECOMMENDED RENEWAL PARTS FOR MAGNEBLAST BREAKERSTYPE AM-13.8-500-5 (*) AND -6 (*), 1200 & 2000 AMPERE

(*SUFFIX LETTERS H, C, B, R, V )

NOTE: On Breakers with suffix "-6 (*) two (2 ) different Design Interrupter Assemblies have beenfurnished. Refer to Figures 18 and 19 to determine correct Renewal Part References.

Catalog No. For Type AM-13.$-500-" No,Ref, TypeFig. AmpereRating

DescriptionReq-6No*No. -5

0281B0708G0010263B0292P0020236C0791G0010236C0791G0040414A0116P0040108B1937P0050236C0790G0090414A0180P0010121A5964P001

3 Operating Rod AssemblyBooster CylinderFlexible ConnectorFlexible ConnectorInsulating PlateInsulating PlateArcing Contact AssemblyPrimary Contact Finger SpringPrimary Contact Finger SpringPrimary Contact Finger SpringPrimary Contact Finger SpringPrimary Contact Finger SpringPrimary Contact FingerPrimary Contact FingerPrimary Contact FingerPrimary Contact FingerPrimary Contact FingerThroat Barrier AssemblyMovable Primary ContactMovable Primary ContactMovable Primary ContactMovable Primary ContactMovable Primary ContactMovable Primary ContactMovable Primary ContactMovable Primary ContactMovable Arcing ContactTube & Piston AssemblyTube & Piston AssemblyUpper ShieldUpper Shield (Right)Upper Shield (Left)Upper Shield Assembly (Right)Upper Shield Assembly (Left)

(Right)(Left)

0281B0708G0010263B0292P0020236C0791G0010236C0791G004

All All8 19329 All All8 (Right)

(Left)37 All All2237 All All22312 All A A223All22 12 V3All 0236C0790G009

0414A0K50P00110 All22

1223 12002 A12120023 2 B

0121A5964P001 1823 2 1200 B24006509787P00123 20002 All

0121A5964P001 18All23 2 200023 0114C5382P002 121200 All3

A 0114C5382P0020114C5382P002

12120023 318B23 3 1200243 2000 0114C5382P00223 All

0114C5382P0020195A7388G002

18323 2000 All323 All All930137A9164P003

0137A9164P0041200 All23 10

31200 All23 100137A9164P0030137A9164P0040U4C5382P0040114C5382P004

3120023 10 A3120023 10 A623 120010 B62000 All23 1060137A9164P003

0137A9164P0040802B0742G0030236 C0792G031Q23.6C0792G0150414A0194P0020108B1937G0010108B1937G002

23 2000 All10623 2000 All1030227A5306G004

0213X0343G0940213X0343G094

All23 14 All' 31323 1200 All

3.200023 13 AllA A 6719A All

3V719A All37 All V19A30195A7349G001

. 0195A7349G0020114C5442G0010114C5442G0020132.C2737G0010132C2737G002

719B AllAll319B 7 AllAll

Throat Cooler AssemblyThroat Cooler AssemblyShield & Cooler Assembly(Rigbt)Shield & Cooler Assembly(Left )'Lower Runner BarrierLower Runner BarrierLower Runner BarrierInsulating PlateLower Runner ShieldUpper Runner InsulationLower Runner Insulation

319B 8 All All319B All8 All

19C 3f 8 AH All&8 All 319C All

All 0456A0336P001 610 All19AAll 0456A0336P001

0132C2735P0070108B5520P0010421A0201P0010265C0163P0090802B0735P001

610 All19BAll 61019C All

0414A0116P0020421A0201P0010265C0163P0090802B0735P001

All 3220 All6AllAll* All 6AU 6AUAll

A All Except Breakers With "B" in SuffixA A All Except Breakers With "V" in Suffix

* Not Illustrated

31



W- "

-fpf *>m

/

GENERAL ELECTRIC INSTALLATION AND SERVICE ENGINEERING OFFICESFOR YOUR LASTING SATISFACTION . . . with th« performonce and ovallabJlity of your G»n-•rol fltctrte oquipmont, GE provides this nationwide network of fiold service offices, servingutility, industrial, transportation and marine users. Qualified field engineers provide inital-lotion, start-up, employee training, engineering maintenance and other services, throughoutthe productive fife of the equipment. For full information, call your nearest Installation A Ser-vice Engineering offke.

FIELD SERVICE OFFICE CODE KEY* Mechanical & Nuclear Servicet Electrical & Electronic Servicej Marine ServiceX Transportation

LOUISIANA OKLAHOMAALABAMA8312 Florida Blvd.Birmingham 35205 . . . . 2151 Highland Ave.

* f J Mobile 36609t Baton Rouge 70806

New Orleans 70125 . . . . 4747 EarhartBlvd.Shreveport 71104 . . . 2620 Centenary Blvd.

1028 North 6th St.

t * t Oklahoma City 73106. . . 2000 Classen Blvd.Tulsa 74105 . . P.O. Box 7646,Southside Sta.UllS.Beltline Highway * t X t

* tt Monroe 71201ALASKA

t Anchorage 99501! : OREGON

t Eugene 97401.* t t Portland 97210

115 Whitney Rd. . . . 1170 Pearl St.2929 NW 29th Ave.

i • :. MARYLAND* tt Baltimore 21201 1 N. Charles St.ARIZONA

Phoenix 85012Tucson 85716.* t 3550 N.Central Ave..151 S.Tucson Blvd. PENNSYLVANIAMASSACHUSETTS• t t Wellesley 02181

+Allentown 18102 1444 Hamilton St.Philadelphia 19102 . .. 3 Penn Center PlazaPittsburgh 15222 . . . .300 6th Avenue Bldg.

*1 Washington St. * t tARKANSAS* tt North Little Rock 72119 120 Main St. MICHIGAN

* t X Detroit 48202t Jackson 49201t Saginaw 48607

. 700 Antoinette St.210 W. Franklin St.CALIFORNIA

* t I Los Angeles 90054t Palo Alto 94303f Sacramento 95808 .t San Diego 92103 . .

t San Francisco 94119 . . . . 55 Hawthorne St.Vernon 90058

SOUTH CAROLINA *

t t Columbia 29204 2700 Middleburg Dr.Greenville 29607. . 41 No.Pleasantburg Dr.. .212 N. Vignes St.

960 San Antonio Rd.2407 J St.. . 2560 First Ave.

+1008 Second National Bank Bldg.TENNESSEEMINNESOTA

t X Duluth 55802* t X

* t Chattanooga 37411* 300 W.Superior St.Minneapolis 55416 . . . 1500 Lilac Drive So. 5800 Bldg, Eastgate Center

3385 Airways Blvd.3035 E. 46th St.*t Memphis 38130.

COLORADO MISSOURI* t Denver 80206 201 University Blvd. TEXAS* t . . . 911 Main St.. .1015 Locust St.Kansas City 64199

St. Louis 63101 * t Amarillo 79101Beaumont 77704

. 303 Polk St.1385 Calder Ave

Corpus Christ! 78401. . 205 N. Chaparral St.Dallas 75222 . . . . 8101 Stemmons Freeway

. . . . 215 N.Stanton. .408 W. Seventh St.4219 Richmond Ave... . . . 434 S. Main St.

* tCONNECTICUT • t XMeriden 06450 1 Prestige Dr.* t X+MONTANA* tt Butte 59701 103 N.Wyoming St.FLORIDA

t J Jacksonville 32203 . . . . 4040 Woodcock Dr.t X Miami 33134 . ,

* t t Tampa 33609 . .GEORGIA* t t Atlanta 30309 . .

t t Savannah 31405

El Paso 79945 . .Fort Worth 76102Houston 77027 . .San Antonio 78204

* t| NEBRASKA t4100 W. Flagler St.. 2106 S. Lois Ave. * t 409 S. 17th St .Omaha 68102 * t Xt

NEW JERSEY25 E. Willow St.* t Millburn 07041 UTAH1860 Peachtree Rd. , NW

5002 Paulsen St..

Salt Lake City 84111 . . 431 S.Third East St.rNEW YORKt X Albany 12205. . . . 15 Computer Drive, West

625 Delaware Ave,

641 Lexington Ave.. . . . 89 East Ave.. . . 3532 James St.

HAWAII* t t Honolulu 96813 VIRGINIA

* I Newport News 23601* t X* t X X New York 10022

Rochester 14604Syracuse 13206

Buffalo 14205440 Coral St. 311 Main St.t t Richmond 23230 . . . . 1508 Willow Lawn Dr.t Roanoke 24015

ILLINOIS* t t X Chicago 60680

INDIANA

*2018 Colonial Ave.840 S. Canal St. * t X

WASHINGTON•ft Seattle 98188

NORTH CAROLINA* t X Charlotte 28207

WilmingtonReigelwood 28456 P.O. Box 186

Evansville 47705 . , . 2709 Washington Ave.Fort Wayne 46807 . . . . 3606 S.Calhoun St.Indianapolis 46207 . . . 3750 N.Meridian St.

t 141 Providence Rd.112 Andover Park East, Tukwlla

E.1805 Trent Ave.t *: «• • t Spokane 99202* tOHIOIOWA WEST VIRGINIA

Davenport 52805. . . P.O. Box 630, 1039 State St. , Bettendorf* t Charleston 25328 . .306 MacCorkle Ave. ,SECincinnati 45206.

Cleveland 44104 .Columbus 43226 .Toledo 43606 . . .Youngstown 44507

2621 Victory Pkwy.1000 Lakeside Ave.. . 1110 Morse Rd.. 3125 Douglas Rd.

272 Indianola Ave.

* tt • t It WISCONSIN

Appleton 54911. . . . 3003 West College Dr.815 E. Michigan St.

t tKENTUCKYLouisville 40218 2300 Meadow Dr. t t t Milwaukee 53202t

GENERAL ELECTRIC SERVICE SHOPSWHEN YOU NEED SERVICE . .. These GE Service Shops will repair, re-condition, and rebuild your electric apparatus. The facilities are availableday and night, seven days a week, for work in the shops or on your prem-

ises. Latest factory methods and genuine GE renewal parts are used tomaintain performance of your equipment. For full information about theseservices, contact your nearest service shop or sales office.

ALABAMA•* Birmingham 35211 . . 1500 Mims Ave. , S. W.• Mobihe 36609

LOUISIANA OKLAHOMA• Baton Rouge 70814 . . . 10955 North Dual St.•* New Orleans 70114• Tulsa 74145 5220 S. 100th East Ave.

721 Lakeside Dr. 1115 DeArmas St..i : OREGON; •

MARYLAND• * Baltimore 21230. . . 570 Wilson St.2727 NW 29th Ave.

ARIZONA • Eugene 97402•* Portland 97210920 E. Fort Ave.• (Phoenix) Glendale 85019.4911 W.Colter St.• Phoenix 85019© Tucson 85713. . . . 2942 So.Palo Verde Ave.

• : i3840 W.Clarendon St.

MASSACHUSETTS•* A (Boston ) Medford 02155

PENNSYLVANIA• Allentown 18103• (Delaware Valley ) Cherry Hill, N. J.. 08034

1790 £.Marlton Pike841 Oak St.

• Philadelphia 19124 , , . 1040 East Erie Ave.• * (Pittsburgh) West Mifflin 151224930 Buttermilk Hollow Rd.

54 N. Harrison St.

668 E. Highland St.3960 Mystic Valley Pkwy.f : : CALIFORNIA

Los Angeles 90301 . . . . 6900 Stanford Ave.• (Los Angeles) Anaheim 92805 MICHIGAN•* A (Detroit) R ive rv iew . . . . 18075 Krause Ave.

* Flint 48505• Johnstown 15802

3601 E. LaPalma Ave. 1506 E. Carpenter Rd.* (Los Angeles) Inglewood 90301228 W. Florence Ave. MINNESOTA

• Duluth 55807 . . . 50th Ave. W & StJ^ouis Bay•* Minneapolis 55430 . . . . 2025 49th Ave., N.MISSOURI•* Kansas City 64120•* St. Louis 63110 .

• York 17403• Sacramento 95814•* (San Francisco) Oakland 9460899 North 17th St.

SOUTH CAROLINA• (Charleston) No. Charleston 29401

1650 34 th St.2490 Debonair St.COLORADO•* Denver 80205

3525 Gardner Ave.. . . 1115 East Rd.3353 Larimer St. TENNESSEE

• Knoxville 37914[

NEW JERSEY• New Brunswick 08902

CONNECTICUT•* (Southington) Plantsville 06479 2621 Governor John Sevier Hwy.708 North Main St.3 Lawrence St. * Memphis 38107370 Atwater St.

NEW MEXICO• Albuquerque 87109 . . . 4420 McLeod Rd. NE TEXAS

FLORIDA•* Jacksonville 32203 . . . . 2020 W.Beaver St.• (Miami) Hialeah 33010. . . 1062 East 28th St.•* Tampa 33601

• Beaumont 77705 . . . ,

• Corpus Christi 78401•* Dallas 75235

1490 W.Cardinal Dr.115 Waco St.. . . 3202 Manor Way

• Houston 77036 . . . . 5534 Harvey Wilson Dr.• Houston 77036• Midland 79701

NEW YORK• Albany 12205 1097 Central Ave.•* (Buffalo) Tonawanda 14150 . . 175 Milens Rd.• (Long Island) Old Bethpage 11804

183 Bethpage-Sweet Hollow Rd.• (New York City) North Bergen, N. J. 070126001 Tonnelle Ave.• (New York City ) Clifton, N. J. 07012

19th 6 Grant Sts.. 6916 Harwin Dr.704 S. Johnston St.GEORGIA• (Atlanta) Chamblee 30341

5035 Peachtree Induatrial-Blvd.2379 John Glenn Dr. UTAH! h * Atlanta •* Salt Lake City 84110 . . . 301 S. 7th West St.

9 Brighton Rd.. . 1 River Rd.ILLINOIS VIRGINIA•* Richmond 23224• Roanoke 24013 .

* A Schenectady 12305• Syracuse 13208. . . . 1015 E. Hiawatha Blvd.Chicago 60638 . . . . 6045 S.Nottingham Ave.• * , . 1403 Ingram Ave.1004 River Ave. , 8E1- :

INDIANA NORTH CAROLINA•* Charlotte 28208• Evansville 47711 . . . 401 N.Congress Ave.1731 Edsall Ave.1138 164th Place

Indianapolis 48222 . . . 1740 W. Vermont St.WASHINGTON• * Seattle 98134• Spokane 99211

2328 Thrift Rd.• Ft. Wayne 46803• Hammond 46320

3422 First Ave. , South. . E.4323 Mission St.OHIO•* • Akron (Canton) 447207900 Whipple Ave. N. W.•* Cincinnati 45202 444 West 3rd St.

4477 East 49th St.. 6660 Huntley Rd.405 Dearborn Ave.• Youngstown 44507 . . . . 2^2 E. Ir.dtanola Ave.

WEST VIRGINIA•* Charleston 25328 . .306 MacCorkle Ave.,SEIOWA• (Davenport) Bettendorf 52722 . 1025 State St. « • A Cleveland 44125• Columbus 43229•• Toledo 43605 . .

WISCONSIN; ENTUCKY• Louisville 40209 . . . . 3900 Crittenden Drive • (Appleton) Menasha 54910 . . 1725 Racine St.

• Milwaukee 53207 . . . 235 W. Oklahoma Ave.• Electrical/Mechanical Service Shop * Instrumentation Shop A Special Manufacturing Shop

GENERAL ELECTRIC COMPANY, PHILADELPHIA , PA .12-70 7-69



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S D D S R E' r — .(- -|i S D D S R E GEI-88764F Supersedes GEI-88764E E-T T R TYPES AM-13.8-500-5C AM-13.8-500-5CB AM-13o8-500-5H AM-13.8-500-5HB AM-13.8-500-5HV …