GE AM-13.8-500-7, Instructions And Recommended Parts For Maintenance

Page 1: ... o TYPE AM 13 S 500 7 1200 2000 AMPERE WITH ML 13 MECHANISM Contents 3 INTRODUCTION RECEIVING HANDLING AND STORAGE 3 i 3 INSTALLATION 4 DESCRIPTION OF OPERATION 10 14 i i o 28 ADJUSTMENTS GENERAL MAINTENANCE RENEWAL PARTS SWITCHGEAR PRODUCTS DEPARTMENT ELECTRIC GENERAL i PHILADELPHIA PA Courtesy of NationalSwitchgear com ...

Page 2: ...i V t r i I r s D ii Courtesy of NationalSwitchgear com ...

Page 3: ... periodically to see that rusting has not started and to insure good mech anical condition Should the breaker be stored under unfavorable atmospheric conditions it should be cleaned and dried out before being placed in service Each breaker is carefully inspected and packed for shipment Immediately upon receipt of the circuit breaker an examination should be made for any damage sustained in transit...

Page 4: ...7 6 7 Refer to metal clad instruction book GEH 1802 for instructions on inserting the breaker into the metal clad unit The closing springs should now be un blocked Rotate the driving eccentric DESCRIPTION OF OPERATION The Magneblast Breaker has two principal components the breaker element and the operating mechanism The breaker element is three similar pole units each of which includes the current...

Page 5: ...re 2 8040932 Left Side View ML 13 Operating Mechanism 1 Secondary Coupler 2 Interlock Switches 3 Auxiliary Switch 4 Latch Checking Switch 5 Switch Cam 6 Closing Roller 7 Power Switches 8 Closing Latch 9 Closing Springs 10 Motor 6 8038805 Spring Discharge Linkage Link Adjusting Bolt Trip Latch Crank Discharge Crank Adjusting Clevis Spring Release Crank 1 2 3 4 5 6 5 Courtesy of NationalSwitchgear c...

Page 6: ...as been rotated approximately 180 degrees the Closing spring 12 will be fully compressed As the ratchet wheel continues to rotate the spring load will shift over center and attempt to discharge After a few degrees of rotation the closing roller 6 Figure 2 will engage the closing latch 8 and the compressed springs will be held by the latch until a closing operation is required During the last few d...

Page 7: ...ural stop expending all residual energy During the time the springs are being com pressed a relay 17 Figure 6 is energized to hold the closing circuit open The relay remains energized until the springs are fully charged and the control switch contacts are re set The closing springs may be charged manually if control voltage is lost A 5 8 ratchet wrench can be used to rotate the eccentric in a coun...

Page 8: ...ils 2 7 This action introduces a magnetic field between the pole pieces i The breaker can be opened either electrically by energizing the trip coil 3 Figure 5 or manually by pushing the trip lever 8 In each method the trip latch is rotated off the trip latch f I 1 24 II Yl o 13 14 15 25 16 w Figure 7 0114C5320 Sectional Side View of Mechanism 1 Handle 2 Trip Coil Support 3 Trip Coil Trip Armature ...

Page 9: ...nd interruption by blowing the arc away from the contacts and into the arc chute As the magnetic field forces the arc deeper into the interrupter along the diverging arc runners the field is progressively increased by the insertion of each additional blow out coil into the circuit 10 12 2 o 13 3 14 15 4 16 5 17 7 6 18 19 8 20 21 9 22 O 23 1 y j Figure 8 0152C5915 Cross Section of Breaker Pole Unit...

Page 10: ... TO PREVENT ACCIDENTAL CLOSING OR TRIPPING Refer to Figure 9 when the breaker is closed the stationary primary contacts 1 should rise from 1 4 to 5 l6 Before checking this dimen sion be sure the mechanism is re set so that the prop pin 13 Figure 7 is resting on the prop To obtain the proper contact adjustment open the breaker and referring to Figure 10 loosen the check nut 4 and turn the adjusting...

Page 11: ... required loosen set and retighten adjustment nut and screw lb 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 Closing Latch Monitoring Switch Refer to Figure 6 The closing latch must be fully re set and the latch monitoring switch 13 operated before the motor will start When the latch is fully reset the...

Page 12: ...atch checking switch arm 3 Plunger Interlock Refer to Figure 14 With the breaker in the closed position the vertical distance A from the top of the plunger bolt 1 to the bottom of the breaker lifting rail 3 should be 11 7 32 to 11 11 32 To change this adjustment add or remove washers 2 If adjustment is required for either pawl the springs must first be fully charged and blocked Loosen seven motor ...

Page 13: ...3 16 to 1 4 with trip latch resting against stop pin e Trip armature travel 7 32 to 9 32 f Closing latch wipe 3 16 to 1 4 Closing latch monitoring switch Max imum clearance 1 32 Figure 14 8034464 Plunger Interlock 1 Plunger Bolt 2 Washer 3 Breaker Lifting Rail g m anp r nr ii fe 3 I viS 1 2 y 1 5 Ihr fit 6 3 jV I 7 8 m V y 4 W 9 o m mm SSESfSs c 1 m kJ y i Kl j HI A 1 1 Ii 15 8040931 Driving Eleme...

Page 14: ... position The opening speed of the arcing contact should be a minimum of 15 feet per second This repre sents the average speed over 3 from the point The operating ranges for the Nominal Voltage Closing Range Tripping Range 30v d c 60v d c 125v d c 140v d c 250v d c 140 280v d c 95 125v a c 190 250v a c 24v d c 48v d c llOv d c 125v d c 220v d c 250v d c 115v a c 230v a c 14 I 34 50v d c 80 115v d ...

Page 15: ...own to have interrupted a fault at or near its rating it is recommended that the breaker be inspected and necessary maintenance be performed as soon after the lfi interruption as is practical It is also recom jPmended that an initial inspection be made of new breakers after the first 500 operations or six months after being put in service whichever comes first The following instructions give the i...

Page 16: ...d within the throat barrier 9 Figure 23 Tighten the supporting bolts 11 and 16 Figure 16 These bolts serve as both the elec trical and mechanical connections between the bushings and the arc runnerswithin the interrupter Check that the movable arcing contact 14 passes between the probes on the upper arc runner 4 Figure 20 without touching Breaker Contacts i Bushings and Insulation The surface of t...

Page 17: ... outlines a lubrication procedure similar to that performed on the breaker at the factory and should be used when a general overhaul of the breaker is necessary General Electric Lubricants D50H15 and D50H47 are available in 1 4 lb collapsible tubes It is so packaged to insure cleanliness and to prevent oxidation METHOD OF CLEANING BEARINGS Whenever cleaning of bearings is required as indicated in ...

Page 18: ...n the driving link 8 Figure 15 driving pawl lever 10 Figure 4 driving pawl 8 latching pawls 2 trip latch roller support 10 Figure 7 cranks 12 and the bearings in the mechanism frame and intercon necting links Bearings that are pressed into the frame or other mechanism members should not be removed 3 3 iI This The hinge of the primary contact arm 19 Figure 8 should be disassembled cleaned and lubri...

Page 19: ... coils should be replaced All connections should be checked for tightness 3 The arc runners should be inspected and replaced when the arc resistant coating on the runner surface has been penetrated as a result of arc erosion 4 Check the stationary arc contacts to assure that the arcing contacts are in good condition and that their con nections are tight 5 Insulating material that is carbonized and...

Page 20: ...wer arc runner assemblies can be done by removing the various screws and assembly bolts not illustrated as shown in Figure 19 8 The arc chute sides 6 Figure 19 can also be separated for inspection Reassemble the interrupter in the reverse order The following items should be noted during reassembly The breaker should be given ageneral inspection and overhaul as required All excessively worn parts i...

Page 21: ...16 5 6 17 7 8 j 9 10 11 1 12 13 14 i 15 16 I 17 18 19 S 20 21 22 1 Figure 18 8041414 Interrupter Assembly I jP S 7 8 re 9 vKc Q m 0 2 3 10 3 4 11 HI 12 nrfn T U SM Q 13 5 Wv g i 6 f p ii IB m 3 I MM Figure 19 8041415 Interrupter Assembly With Side Removed 1 Upper Arc Runner 2 Upper Arc Runner Assembly 7 3 Blow out Coil 8 Blow out Core 5 Upper Arc Runner Spacers 6 Arc Chute Side Throat Cooler Assem...

Page 22: ...ntact fingers by removing two bolts and locking plates 8 2 Grasp the lower end of the contact fingers with pliers and pull contact assembly downward to remove from stud assembly 3 To disassemble braids from stud plate remove one bolt 5 4 To disassemble stud plate from con tact support remove two bolts 6 5 Reassemble in the reverse order make sure locking plates are properly reassembled with bolts ...

Page 23: ...aid 6 Mounting Bolt 7 Flexible Braid 8 Connection Bolt 9 Stud for Mounting Arcing Fingers 10 Stationary Arcing Contact Assembly 11 Throat Barrier 3 Raise the contact finger to clear the primary contact stop plate 8 and lift the finger out of contact support 7 Remove one contact finger at any pole of a breaker it is recom mended that both the stationary and movable contacts on that pole be replaced...

Page 24: ...the bushings may be accomplished by placing the breaker in a de energized spare metal clad unit before tightening the bushing mounting bolts This must be done before the interrupters are reinstalled To replace the bushing proceed as follows Rear Bushing 1 Disassemble nuts from assembly bolts 11 and remove the movable primary contacts 10 2 Reassemble in reverse order To replace the movable primary ...

Page 25: ...4469 Figure 24D 8034468 Figure 24 Method of Installing Primary Contact Springs Using a Spring Compressor 1 Spring Guide 2 Compressor Nut 3 Spring Compressor 4 Spring Retainer 6 Spring Contact Support Stop Plate Stationary Primary Finger 7 8 9 5 Assembly Bolts 25 Courtesy of NationalSwitchgear com ...

Page 26: ...age trip latch spring 1 Remove three 3 cotter pins from trip shaft Remove trip arm screw 10 and trip latch set screw 8 Place a block between the trip latch 9 and the left side of the mechanism frame Drive the trip shaft to the left until the latch is free of the key then remove the key Check for and remove any burrs raised around the keyway on the shaft to avoid damaging the trip shaft bearings Sh...

Page 27: ...ocation to allow approxi mately 1 4 of armature travel before latch starts to move Butt connect wires and check operation of solenoid electrically and mechanically 6 f 1 s 2 1 To remove motor support 9 Figure 15 first remove the closing latch spring 12 Figure 6 Remove the retaining ring 6 Figure 15 and driving link 8 Remove motor leads from the terminal board Remove six 3 8 bolts 1 Figure 15 on bo...

Page 28: ...prompt replacement of any worn broken or damaged parts A stock of such parts minimize service interruptions caused by breakdowns and saves time and expense When continuous operation is a primary consideration more renewal parts should be carried the amount depending upon the severity of the service and the time required to secure replacements Renewal parts which are furnished may not be identical ...

Page 29: ...01 006174582G015 006174582G002 006174582G013 006174582G032 006275070G001 006275070G002 6 15 1 Closing Coil 110 125 V DC 220 V DC 250 V DC 115 V AC 60 Hz 230 V AC 60 Hz 48 V AC 006174582G001 006174582G015 006174582G002 006174582G010 006174582G014 006275070G002 6 7 5 Switch Norm ally Open Switch Normally Closed Auxiliary Switch Closing Latch Spring Prop Spring Driving Pawl Spring Latching Pawl Sprin...

Page 30: ...Finger Primary Contact Finger Primary Contact Finger 1200 B 18 2000 All 18 23 9 All All 0195A7388 G002 3 Throat Barrier Assembly 1 23 A 1200 10 0137A9164 P003 0137A9164 P004 0114C5382 P004 0114C5382 P004 3 Movable Primary Contact Movable Primary Contact Movable Primary Contact Movable Primary Contact A 1200 3 1200 B 6 2000 All 6 S 23 14 All All 0108B5543 G001 3 Movable Arcing Contact 23 13 1200 Al...

Page 31: ...TOR AUX SW 7 7 52 X 52Y X REQUIRED FOR 220 250V dc OPERATION ONLY A CONTACTS FURNISHED AS REQUIRED r 2TJ t 5 2 M SM LS M Y Y i i i i i i OR Y 0165B7906 DESCRIPTION REF NO FIG NO 52 AUXILIARY SWITCH 3 2 AUX SW CLOSING COIL SPRGo REL SOL D 15 6 52X CONTROL RELAY 17 6 52Y 52 TRIP COIL 3 5 TC 52 INTERLOCK SWITCHES 2 2 mr 52 CLOSING LATCH MONITORING SWITCH 13 6 CL MS 52 POWER SWITCHES 7 6 SM LS 52 LATC...

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