GE AM-4.16-250-9, Instructions Manual

Page 1: ...INSTRUCTIONS AND RECOMMENDED PARTS GEK 41902 FOR MAINTENANCE 28 I I I I SWITCHGEAR PRODUCTS DEPARTMENT GENERAL ELECTRIC 5t I 1 1 PHILADELPHIA PA 1 a Courtesy of NationalSwitchgear com ...

Page 2: ...Courtesy of NationalSwitchgear com ...

Page 3: ...ugh handling is evident a damage claim should be filed immediately with the transportation com pany and the nearest General Electric Sales Office should be notified Circuit breakers for 2 The breaker should be stored in a clean location free from corrosive gases or fumes particular care should be taken to protect the equipment from moisture and cement dust as this combination has a very corrosive ...

Page 4: ...re that the mechanism does not stick or bind during the entire stroke that it latches securely in the closed position and that it trips freely when the manual trip lever is operated At this time also check the following adjustments a Arcing contact wipe Refer to page 10 b Primary contact wipe Refertopage11 c Primary contact gap Refer to page11 If the breaker secondary wiring NOTE is to be given a ...

Page 5: ...evice Figure 2 8034473 Left Side View ML 13 Operating Mechanism 1 i Secondary Coupler Interlock Switches Auxiliary Switch Latch Checking Switch Switch Cam Charge Discharge Indicator Closing Latch Roller Power Switches Closing Latch Closing Springs Motor Fuses 2 2 3 4 5 6 7 8 9 10 ii 12 Figure 3 8038805 Spring Discharge Linkage 1 Link 2 Adjusting Bolt 3 Trip Latch Crank 4 Discharge Crank 5 Adjustin...

Page 6: ...line up with breakers having type ML 11 mechanisms the spring charging circuit for both mechanisms should be fused with Buss Company Fusetrons as follows Cont Volt Cat No Fuse Size t 48v d c llOv d c 125v d c 115v a c 220v d c 250v d c 230v a c 10A FRN 10 FRN 4 FRN 4 FRN 4 FRN 2 5 FRN 2 5 FRN 2 5 4A 4A A plunger interlock Figure 14 can be provided when required to operate a stationary auxiliary sw...

Page 7: ...t wrench provides for maximum safety in the event that control power is suddenly restored without warning In this event the motor drive will override the ratchet wrench and continues tocharge the springs Closing Operation The breaker can be closed electrically by energizing the spring release solenoid 15 Figure 6 or manually by pushing the close button 9 Figure 5 In either method the closing latch...

Page 8: ...out coils 3 11 This action introduces a magnetic field between the pole pieces 5 9 of the interrupter that forces the arc deeper into the arc chute 8 the arcing contacts part a discharge of air is expelled through the booster tube 28 across the arc This air flow assists the arc transfer and interruption by blowing the arc away from the contacts and into the arc chute The magnetic field forces the ...

Page 9: ... 23 Movable Primary Contacts 14 Front Bushing 24 Cup Bearing 15 Rear Bushing 25 Yoke 16 Frame 26 Movable Contact Arm Assembly 17 Main Operating Crank 27 Movable Arcing Contact 18 Primary Contact Springs 28 Booster Tube and Piston 19 Spring Retainer 29 Connection Bar 20 Lower Horizontal Barrier 30 Booster Cylinder Box Barrier Support Upper Blow out Core Upper Blow out Coil Upper Arc Runner Upper Po...

Page 10: ...sing operation pse 16 ADJUSTMENTS All adjustments should be checked during per iodic inspections and whenever it becomes nec essary to repair or replace parts that havebecome worn or defective while in service The following adjustments are listed in the order in which they are to be checked after removing the box barriers and front cover from the breaker MECHANISM UNLESSTHE CLOSINGSPRINGSARE BLOCK...

Page 11: ...0 loosen the check nut 4 and turn the adjusting nut 3 Screw ing up on the adjusting nut will decrease the primary contact wipe down will increase it Tighten the check 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 or greater when the breaker is fully closed Trip Latc...

Page 12: ...r the minimum at the driving pawl Move the motor assembly approximately twice the dimensional in crease required at the pawl Be certain the motor assembly is moved straight forward or rearward and tighten the one bolt on the right side of the mounting frame first to assure proper alignment After tightening the remaining bolts the springs should be released and the clearance again checked as descri...

Page 13: ...taining Ring 5 Hex Charging Stud 6 Driving Link Motor Support 8 Retaining Ring 9 Motor 10 Fuse 7 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 16 19 32 to 16 23 32 To change this adjustment add or remove washers 2 Auxiliary Fuses Refer to Figure 15 On br...

Page 14: ... or motor does not fall in the specified range check the voltage at the sourceof power and line drop between the power source and breaker When two or more breakers operating from the same control power source are required to close simultaneously the closed circuit voltage at the closing coil or motor of each breaker must fall within the specified limits The closing speed of the arcing contact of t...

Page 15: ... the insulation they should be repaired or the part replaced Periodic Inspection The frequency of the inspection and maintenance operations required should be determined by each operating company and will depend on the applica tion of the breakers and the operating conditions Factors which should be considered are Import ance to overall plant or system operation number of operations and magnitude ...

Page 16: ...terrupter 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 under ADJUSTMENTS In order to maintain reliable operation it is important that all circuit breakers be properly lubricated at all times Most of the bearings and rolling surfaces utilize a newtype of dry lubrication that will ...

Page 17: ...earings main crank shaft driving pawl lever Bronze or cast iron Light applica tion of machine oil SAE 20 or SAE 30 Remove bearings or links clean per instructions and apply D50H15 lubri cant liberally Contact Arm Hinge Assembly Cup bearing Loose rings between bushing and contact arm No lubrication required Wipe clean and apply D50H47 Roller and Needle Bearings Light applica tion of machine oil SAE...

Page 18: ...e following schedule is recommended for such breakers A Every 500 Operations or EverySix Months Whichever Comes First i il Refer to Figure 7 The cam follower bearings 6 latch roller bearing 9 and camshaft bearings 25 should be removed from the mechanism and the inner race disassembled They should then be placed in a container of clean petroleum solvent or similar cleaner TETRACHLORIDE has become b...

Page 19: ...stationary arc contacts to assure that the arcing contacts are in good condition and that their connections are tight 5 Insulating material that is carbonized and cannot be satisfactorily cleaned should be replaced 6 Any parts damaged or severely burned and or eroded from arc action should be replaced NOTE Fine cracks maydevelop in the fins of the arc chute sides This is to be expected with cerami...

Page 20: ... REPLACEMENT 1 The fins of the arc chute sides should be equally spaced and aligned before bolting together The front edge along the runner of the two arc chute sides should be parallel and in line This section covers the proper method of removing and replacing those parts of the breaker subject to damage and wear that may require repair or replacement at the installation IMPORTANT UPON COMPLETION...

Page 21: ...7442E Interrupter Assembly m Q r r a 2 Y T 1 Upper Arc Runner Spacer 2 Upper Arc Runner Assembly 3 Blowout Core 4 Blowout Coil 5 Upper Arc Runner 6 Arc Chute Side 7 Throat Insulation 8 Lower Shield 9 Lower Arc Runner 10 Blowout Coil 11 Blowout Core 12 Lower Insulation 13 Lower Arc Runner Assembly 14 Lower Coil Connection 15 Lower Arc Runner Spacers wm V TV LC W IHV J5 A 7 wni ssawwa iw i ssaSaasa ...

Page 22: ...r slowly to check that the movable arcing contact is approximately centered on the station ary arcing contact and that it does not rub on either side of the throat barrier 9 NOTE Whenever it is found necessary to replace arcing contacts on any pole of a breaker it is recommended that both the stationary and movable con tacts on that pole be replaced at the same time C Stationary Primary Contacts 9...

Page 23: ...o prevent spring from slipping out of the compressor 4 Place washer not shown on guide on top of spring place top of guide into hole in spring retainer 4 and round end of spring guide in cutout in primary finger Figure 24C 5 Hold spring Assembly firmly in place and remove spring compressor D Movable Primary Contacts 10 Figure 23 To replace the movable primary con tacts on a 1200 ampere breaker pro...

Page 24: ...ng to adjacent bushings in both directions so that it may be reinstalled in the same location However it is possible to remove and re assemble three bushings at one time If this is preferred alignment of 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 reinstall...

Page 25: ...034469 Figure 24D 8034468 Figure 24 Method of Installing Primary Contact Springs Using a Spring Compressor 1 Spring Guide 2 Compressor Njit 3 Spring Compressor 4 Spring Retainer 5 Assembly Bolts 6 Spring 7 Contact Support 8 Stop Plate 9 Stationary Primary Finger H 25 mm Courtesy of NationalSwitchgear com ...

Page 26: ...ound the keyway on the shaft to avoid damaging the trip shaft bearings 7 Shaft latch etc may now be removed by driving it to the left Note quantity and location of washers used as spacers in the assembly 8 Reassemble parts in reverseorder Be sure trip latch is aligned in center of trip latch roller and that the latch spring is properly installed Check latch adjustment as de scribed under ADJUSTMEN...

Page 27: ...ectors and remove coil 4 When replacing the coil be sure toassemble the correct fiber spacers at the ends before bolting support 7 5 Adjust coil location to allow approximately 1 4 of armature travel before latch starts to move 6 Butt connect wires and check operation of solenoid electrically and mechanically SPRING RELEASE COIL MOTOR SUPPORT 1 To remove motor support 7 Figure 15 first remove the ...

Page 28: ...nable the prompt replace ment 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 consider ation more renewal parts should be carried the amount depending upon the severity of the service and the time required to secure replacements ORDERING INSTRUCTIONS Always specify the co...

Page 29: ...006174582G015 006174582G002 006174582G013 006174582G032 006275070G001 006275070G002 a 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 Normally Open Switch Normally Closed Auxiliary Switch Closing Latch Spring Prop Spring Driving Pawl Spring Latching Pawl Spring ...

Page 30: ... All 23 2 All 0121A5964P001 0121A5964P001 18 Primary Contact Finger Spring All 24 B 23 3 All 0114C5382P002 0114C5382P002 18 Primary Contact Finger All 24 B 23 All 0U4C5382P004 0137A9164P003 0137A9164P004 6 10 Movable Primary Contact All 6 B 6 All B 23 14 3 All All 0108B5543G001 Movable Arcing Contact 23 13 2000 0213X0343G091 0213X0343G090 0213X0343G091 3 Tube Piston Assembly All 1200 3 1200 3 B I ...

Page 31: ...OR 52 AUX SW i TC z 52 X 52Y REQUIRED FOR 220 250V dc OPERATION ONLY A CONTACTS FURNISHED AS REQUIRED r 7P I I i 4 52 N SM LS Y Y i i i i i i OR r 0165B7906 DESCRIPTION REF NO FIG NO 52 AUXILIARY SWITCH 2 3 AUX SW CLOSING COIL SPRGo REL SOL D 52X 6 15 CONTROL RELAY 6 17 52Y 52 TRIP COIL 3 5 TC 52 INTERLOCK SWITCHES 2 2 TST 52 CLOSING LATCH MONITORING SWITCH 13 6 CL MS 52 POWER SWITCHES 7 6 SM LS L...

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