GE AM-4.16-250-6, Instructions And Recommended Parts For Maintenance

Page 1: ...REAKER TYPES AM 4 16 250 6 AM 4 16 250 7 AM 4 16 250 8 i CONTENTS Introduction 3 Receiving Handling and Storage 3 Installation 4 Description of Operation Adjustments General Maintenance 1 4 4 10 Renewal Parts 28 SWITCHGEAR PRODUCTS DEPARTMENT ELECTRIC GENERAL PHILADELPHIA PA i Courtesy of NationalSwitchgear com ...

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

Page 3: ...damage sustained in transit If injury or rough 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 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...

Page 4: ...ion check to insure 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 Refer to page 11 c Primary contact gap Refer to page 11 If the breaker secondary wiring N...

Page 5: ... Side View ML 13 Operating Mechanism 1 Secondary Coupler 2 Interlock Switches 3o Auxiliary Switch 4 Latch Checking Switch 5 Switch Cam 6 Charge Discharge Indicator 7 Closing Latch Roller 8 Power Switches 9 Closing Latch 10 Closing Springs 11 Motor 12 Fuses Figure 3 8038805 Spring Discharge Linkage 1 Link 2 Adjusting Bolt 3 Trip Latch Crank 4 Discharge Crank 5 Adjusting Clevis 6 Spring Release Cran...

Page 6: ... can be released and returned to the reset position by pushing in on the trip lever 8 Figure 5 It may require more than normal force to release the interlock A plunger interlock Figure 14 can be provided when required to operate a stationary auxiliary switch and or a rod interlock mounted in the metal clad unit Cont Volt Fuse Size Cat No a 48v d c HOv d c 125v d c 115v a c 220v d c 250v d c 230v a...

Page 7: ...pel has been rotated approximately 180 degrees the closing springs 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 7 Figure 2 will engage the closing latch 9 and the compressed springs will be held by the latch until a closing operation is required During the last...

Page 8: ...s a magnetic field between the pole pieces 5 9 of the interrupter that forces the arc deeper into the arc chute 8 At the time 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 arc deeper into the inte...

Page 9: ...ble Arcing Contact 28 Booster Tube and Piston 29 Connection Bar 30 Booster Cylinder 11 Lower Blow out Coil 12 Lower Blow out Core 13 Lower Barrier 14o Front Bushing 15 Rear Bushing 16 Frame 17 Main Operating Crank 18 Upper Horizontal Barrier 19 Spring Retainer 20 Lower Horizontal Barrier 1 Box Barrier Handle Upper Blow out Core Upper Blow out Coil Upper Arc Runner Upper Pole Piece Stationary Arcin...

Page 10: ...S MECHANISM UNLESSTHE CLOSINGSPRINGS ARE BLOCKED AND THE OPENING SPRINGS HAVE BEEN BLOCKED PREVENT ACCIDENTAL CLOSING OR TRIPPING All adjustments should be checked during per iodic inspections and whenever it becomes nec essary to repair or replace parts that have become worn or defective while in service The following adjustments are listed in the order in which they are to be checked after remov...

Page 11: ...d and a visual inspection is usually all that is required If this setting is not correct look for insufficient travel of the trip shaft 7 Trip Armature Travel Refer to Figure 7 The trip armature 4 should have 7 32 to 9 32 travel before the trip latch 8 starts to move This can be adjusted by moving the trip coil support 2 and or by adjusting the trip armature screw 12 Figure 11 A locking screw loca...

Page 12: ...r either pawl the springs must first be fully charged and blocked Loosen seven motor support bolts 2 Figure 1 and move entire motor assembly to the rear if the clearance is under the minimum at the latching pawls and to the front if the clearance is under the minimum at the driving pawl Move the motor assembly approximately twice the dimensional in crease required at the pawl Be certain the motor ...

Page 13: ...p between the trip latch located on the latch roller There should be a minimum of 3 4 7 8 mg 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 Inspection and Test 1 For ease in reviewing ...

Page 14: ... or motor does not fall in the specified range check the voltage at the source of 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 W The closing speed of the arcing contact o...

Page 15: ... the maintenance of breakers twMRr aanifUHam Interrupters Since there are no moving parts the interrupters of a magne blast breaker will normally require little or no inspection unless there is evidence of damage to the arc chutes sides or contamination in the throat area If either of these conditions are present the interrupters should be removed from the breaker and the following points noted 1 ...

Page 16: ...passes be By removing the box barrier the movable and stationary primary contacts and the movable arcing contacts can be inspected The stationary arcing contacts can be inspected only after removing the interrupter 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...

Page 17: ...arings 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: ...re of the applications The following schedule is recommended for such breakers A Every 500 Operations or Every Six Months Whichever Comes First Refer to Figure 7 The cam follower bearings 6 latch roller bearing 9 and cam shaft 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 TETR...

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

Page 20: ...noted during re assembly REPAIR AND REPLACEMENT 1 US l 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 OF ANY REPAIR WORK ALL BREAKER AND MECHANISMADJUSTMENTS MUST BE CHECKED STALLATION paying particular attention to AD JUSTMENTS and FINAL INSPE...

Page 21: ... Assembly Bolt 8 Lower Brace 9 Assembly Bolt 10 Upper Interrupter Support 11 Insulating Cap 12 Side Shield 13 Assembly Bolt 14 Lower Interrupter Support 15 Assembly Bolts 16 Assembly Bolts 3 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 ...

Page 22: ...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 WJ W h Figure 20 8039604 Interrupter Assembly 1 Upper Moun...

Page 23: ...g firmly in yoke on spring compressor to prevent spring from slipping out of the compressor 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 Hold spring assembly firmly in place and remove spring compressor 1 D Movable Primary Contacts 10 Figure 23 To replace the movable primary c...

Page 24: ...n the same location Figure 23 8039588 Contact Assembly 1 Front Bushing 2 Contact Springs 3 Stationary Primary Contacts 4 Operating Rod Pin 5 Buffer 6 Cup Bearing 7 Hinge Pin 8 Contact Arm 9 Throat Barrier 10 Movable Primary Contacts 11 Assembly Bolts 12 Assembly Bolts 13 Piston Assembly 14 Movable Arcing Contact 15 Connection Bar 1 i S 3 However it is possible to remove and re assemble three bushi...

Page 25: ...C 8034469 Figure 24D 8034468 Figure 24 Method of Installing Primary Contact Springs Using a Spring Compressor 6 Spring 7 Contact Support 8 Stop Plate 9 Stationary Primary Finger 1 Spring Guide 2 Compressor Nut 3 Spring Compressor 4 Spring Retainer 5 Assembly Bolts 25 Courtesy of NationalSwitchgear com ...

Page 26: ...ce pin 7 being sure the silvered contact washers between the bush ing and contact arms are in place The contact surfaces at the hinge point of the contact blade and bushing should have athin coating of D50H47 grease Check all contact adjustments as outlined under ADJUSTMENTS 1 TRIP SHAFT AND LATCH See Figure 11 Remove spring discharge crank 5 manual 13 and if furnished the latch 1 2 trip lever che...

Page 27: ...or support 7 Figure 15 first remove the closing latch spring 12 Figure 6 Remove the retaining ring 4 Figure 15 and driving link 6 Remove motor leads from the terminal board Remove six 3 8 bolts 1 Figure 15 on bottom 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 the eccentric 3 Reassemble all parts of the motor support ...

Page 28: ... 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 complete na...

Page 29: ...0 V DC 115 V AC 60 Hz 230 V AC 60 Hz 48 V DC 1 6 15 006174582G001 006174582G015 006174582G002 006174582G010 006174582G014 006275070G002 0456A0866P005 0456A0866P006 Switch Normally Open Switch Normally Closed Auxiliary Switch Closing Latch Spring Prop Spring Driving Pawl Spring Latching Pawl Spring 9 6 7 5 6 7 1 ZL 5 1 1 0161A4231P001 0137A9252P001 0161A4241P001 0161A5909P001 6 12 1 4 1 5 4 1 8 2 4...

Page 30: ... 0137A9164P004 0137A9164P003 0137A9164P004 1200 All 3 1200 All 6 All 2000 6 23 2000 All Movable Primary Contact 10 0114C5382P004 0137A9164P003 0137A9164P004 0114C5382P004 0137A9164P003 0137A9164P004 6 All 6 All B 6 All B 1 0802B0742G001 3 All 0802B0742G001 0227A5306G004 0802B0742G002 0227A5306G005 Movable Arcing Contact 23 14 3 All B pi 0213X0343G043 0213X0343G044 0213X0343G043 0213X0343G044 3 120...

Page 31: ... 52 AUX SW i TC REST z52 X 52Y REQUIRED FOR 220 ft 250V dc OPERATION ONLY A CONTACTS FURNISHED AS REQUIRED r i A i i U 52 NX N SM LS Y Y i i 1 OR Y FIG NO REF NO DESCRIPTION 52 3 2 AUXILIARY SWITCH AUX SW CLOSING COIL SPRGo REL SOL D 52X 6 15 52Y 6 17 CONTROL RELAY 52 3 5 TRIP COIL TC 52 2 2 INTERLOCK SWITCHES TS 52 13 6 CLOSING LATCH MONITORING SWITCH CL MS 52 7 6 POWER SWITCHES S M L S LATCH CHE...

Page 32: ... Rd 3125 Douglas Rd 272 Indianola Ave t Davenport 52805 P O Box 630 1039 State St Bettendorf r t t t 1 WISCONSIN t a Appleton 54911 3003 West College Dr 615 E Michigan St t I KENTUCKY m in t Milwaukee 53202 2300 Meadow Dr Louisville 40218 t t I GENERAL ELECTRIC SERVICE SHOPS 1 n WHEN YOU NEED SERVICE These G Service Shops will repair re condition and rebuild your electric apparatus The facilities ...