GE AM-4.16-250-6C, Instructions And Renewal Parts

Page 1: ...16 250 6H AM 4 16 250 7c AM 4 16 250 7H i 71 rt 1J F i i Ffi 4 rihv i 73 K V 1 T CONTENTS 1 t i Introduction 1 N Receiving Handling and Storage V 1 Installation 2 Description of Operation 4 Adjustments General Maintenance 12 28 Renewal Parts f t I SWITCHGEAR DEPARTMENT i GENERAL ELECTRIC PHILADELPHIA PA i Courtesy of NationalSwitchgear com ...

Page 2: ...i i t V l t v Courtesy of NationalSwitchgear com ...

Page 3: ...in formation of any particular breaker The short circuit conditions to be Imposed on the breaker must not exceed Its rating nor should it be called upon to operate at voltages or currents greater than those o given on the nameplate Since this book is written to cover several o ratings of breakers that are of the same general design all instruc 0 tions will be of a general character and all illustr...

Page 4: ... be stored In a clean location free from corro sive gases or fumes particular care should be taken to protect the equipment from moisture and cement dust as this combination has a very corrosive effect on many parts 3 Machined parts of the operating mechanism etc with a heavy oil or grease to prevent rusting If the breaker is stored for any length of time It should be inspected periodically to see...

Page 5: ...TO PREVENT ACCIDENTAL CLOSING OR TRIPPING a b c After the adjustments have been checked the springs can be un blocked Rotate the driving eccentric until the indicator reads CHARGED and the ratchet wheel no longer is advanced The blocking device can now be removed S 4 3 Attach test coupler to circuit breaker and operate electrically several times TROL POWER CHECK Check the control voltage as descri...

Page 6: ...d metal clad unit to prevent rais ing or lowering of the breaker in the unit while In a closed position and to prevent a closing operation when the breaker is not in either the fully raised or lowered position A plunger can also be provided to operate an additional auxiliary switch mounted in the metal clad unit When the breaker is interchangeable with MS 13 solenoid operated breakers in M 26 meta...

Page 7: ...atchet wheel The use of the ratchet wrench provides for maximum safety in the event that control power is suddenly restored without warning In this event the motor drive will take over again and continues to charge the springs Ill Closing Operation m Closing the breaker is accomplished by energizing the closing solenoid or by manually pressing the close button In either case the closing latch is r...

Page 8: ...rc is rapidly increased and the heat from the arc is absorbed The in creased resistance reduces both the magnitude and the phase angle of the current and at an early current zero the arc path is so long and the gases produced by the arc so cooled that the arc cannot reestablish itself and interruption occurs Manual tripping follows the same procedure except that instead of energizing the trip circ...

Page 9: ...need to be replaced When making this check also see that the movable arcing contact 5 passes between the slots or the arcing probes on the upper arc runner with out touching whichever is applicable Primary Contact Gap IP Refer to Fig 9 With the breaker closed press the manual trip button allowing the breaker to trip open normally Do not force the contacts open wider by hand The gap between the sta...

Page 10: ...d Relay Switches g 6 about and rotate and support With the closing springs blocked rotate the switch cam l Fi until the switch striker 8 has traveled the maximum amount 180 degrees rotation of cam Loosen mounting bolt 14 switch support 15 until the gap between the striker 8 15 is 1 32 or less Interlock Switch Wipe Refer to Fig 10 Rotate the Interlock shaft l manually clockwise to release the inter...

Page 11: ...g pawl Move the motor assembly approximately twice the dimensional increase 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 frorae first to assure proper alignment After tightening the remaining bolts the springs should be released and the clearance again checked as described above AUXILIARY DEVICES...

Page 12: ...gap 3 13 16 1 8 3 16 d Trip latch wipe 3 16 to 1 4 with trip latch resting against stop pin e Trip latch clearance 1 32 to l l6 f Prop clearance l l6 to 5 32 1 g Release latch wipe 3 16 to l 4 h Release latch monitoring switch maximum clearance 1 32 i Motor and relay switch maximum clearance 1 32 j Interlock switch maximum clearance 1 32 k Auxiliary switch a contacts close when breaker primary con...

Page 13: ...ents are checked as described the operating voltages should be checked at the release coil trip coil and motor terminals For electrical operation of the mechanism the control power may be either an alternating or di rect current source The operating ranges for the closing and tripping voltages are given on the breaker nameplate The following ranges are standard m Closing Range Nominal Voltage Trip...

Page 14: ...CIDENTAL TRIPPING DO NOT WORK ON THE BREAKER OR MECHANISM WHILE THE SPRINGS ARE CHARGED UNLESS THEY ARE SECURED IN THAT POSITION BY THE MAINTENANCE SPRING BLOCKING DEVICE Periodic Inspection The frequency of periodic inspection should be determined by each operating company on the basis of the number of operations including switching the magnitude of currents interrupted and any unusual operations...

Page 15: ...essive wear Lubricate the mechanism as outlined below then using the manual charging wrench open and close the breaker several times to make certain that the mechanism operates freely throughout its entire stroke Check the mechanism adjustments as specified under ADJUSTMENTS Check all terminal connections i Bushings and Insulation The surface of the bushings should be kept clean and unraarred to p...

Page 16: ...us trouble A definite lubrication schedule should be set up taking into consideration the frequency of operation of the breaker and local conditions Until such a schedule is worked out the breaker should be lubricated at each periodic inspection and also whenever it is overhauled in accordance with the lubrication chart Fig 20 It Is also recommended that all circuit breakers be operated at regular...

Page 17: ...rely removed Allow this oil to drain off and then repack them immediately with G E lubricant D50H15 being sure all metal parts are greased The removable seals should then be replaced NOTE If it becomes necessary to clean the bearings in alcohol shellac thinner be sure the alcohol is perfectly clean and do not allow the bearings to remain in the alcohol more than a few hours If it is desir able to ...

Page 18: ...hey should be smoothed with crocus cloth or draw filed After contact dressing the primary contactsshould be greased lightly with D50H47 5 Arcing Contacts When the arcing contact wipe is less than the minimum specified under ADJUSTMENTS the contacts should be re placed The contacts should be inspected for uneven wear and or damage using a mirror to Inspect the stationary contacts Nor mally it will ...

Page 19: ...lated from each other the coils should be replaced All connections should be checked for tightness II 3 The arc runners should be inspected and replaced when any part of their area has been reduced to 25 of the original metal thickness as a result of arc erosion 4 Check the stationary arc contacts to assure that the arcing con tacts are in good condition and that their connections are tight Insula...

Page 20: ...intained according to the preceeding recommendations and in addition should have items 1A1 1A2 and 1A3 repeated at 500 operation intervals TROUBLE SHOOTING Hi Failure of a breaker to operate properly will generally fall within four general classes failure to trip failure to close or latch closed clos ing springs will not recharge and overheating The following is a brief outline showing particular ...

Page 21: ...l binding screws are tight Insufficient control voltage caused by excessive drop in leads REMEDY Install larger wires and improve electrical contact at con nections 4 5 6 7 8 9 Insufficient control voltage caused by poor regulation a c control REMEDY Install larger control transformer Failure to Recharge Springs 1 Defective motor cut off switch interlock switch or closing latch monitoring switch R...

Page 22: ...PLETION OP ANY REPAIR WORK ALL BREAKER AND MECHANISM AD JUSTMENTS MUST BE CHECKED Refer to the section on INSTALLATION paying particular attention to ADJUSTMENTS and PINAL INSPECTION Arc Chute To inspect or replace blow out coils To remove an arc chute first open the breaker and remove the box barrier 7 Fig 7 Loosen the two upper supporting bolts 2 Pig 19 and the one lower support bolt 9 using a 3...

Page 23: ...re tight To reassemble the arc chute to the breaker proceed as follows 1 Rest the lower mounting support 10 on the arc chute mounting bracket 8 as shown in Fig 19 2 Slide the arc chute forward and lift it slightly to engage the support ing bolts 2 Fig 19 in the slots of the upper mounting support 3 la The following items should m 3 Check the spring baffle ll Fig 22 to assure that it closes the gap...

Page 24: ...d by stop plate 8 2 Open spring compressor 3 and assemble spring guide spring and spring compressor Fig 23A 3 Turn nut 2 in clockwise direction to compress contact spring Fig 23B Hold spring firmly in yoke on spring compressor to 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 the round end ...

Page 25: ... the bushings be removed and reassembled one at a time Also before removing any one bushing measure the distance from that particular bushing to adjacent bushings in both directions so that it may be reinstalled in the same location m It Is also possible to remove and reassemble three bushings at one time If this is preferred alignment of the bushings may be accomplished by placing the breaker in ...

Page 26: ... have a thin coating of D50H47 grease 6 Check all contact adjustments as outlined under ADJUSTMENTS INTERLOCK SWITCH To remove the interlock switch 3 Fig 10 remove the two mounting screws and disconnect the lead wires Reassemble in the reverse order and check the switch adjustments as explained under ADJUSTMENTS LATCH CHECKING SWITCH To remove the latch checking switch 7 Fig 10 when furnished re m...

Page 27: ...ove 2 cotter pins at ends of shaft 8 Fig 12 2 Partially remove shaft out right side of frame until latch roller 6 is free 3 Reassemble in reverse order with proper spacing of washers sure latch roller rotates freely CLOSING LATCH Be Remove cotter pins at both ends of latch shaft 19 Fig 6 Remove spring and paddle 16 Fig 6 Remove set screws from latch 3 Fig 6 Move shaft l4 to left away from frame by...

Page 28: ...left until key is fully exposed Remove key and check shaft for burrs 5 Remove shaft out left side of frame 6 Reassemble in reverse order using the correct number of washers and spacers to properly locate the parts 7 Rotate the mechanism through a closing operation using the manual charging wrench Check the location of the cam follower 6 Fig 5 on the cam 16 If necessary move the cam to correct the ...

Page 29: ...with the manual charging wrench and apply the spring blocking device as described in INSTALLATION 2 Discharge springs by pushing manual close button 7 Fig 2 3 Rotate cam shaft 8 Fig 3 by using the manual charging wrench until the gap between the spring 6 and the bearing block 10 Is 2 Inches or more 4 Lift both springs until they clear the lower supports then pull forward and down until the top sup...

Page 30: ...eakers AM 4 16 250 6C AM 4 16 250 6CR AM 4 16 250 6H AM 4 16 250 6HR AM 4 16 250 7C AM 4 16 250 7CR AM 4 16 250 7H AM 4 16 250 7HR AM 4 16 250 7HB AM 4 16 250 7HBR The listed terras Right and Left apply when facing the mechanism end of the breaker 1200A 2000A 1200A 2000A 1200A 2000A 1200A 2000A 1200A 2000A 1200A 2000A 1200A 2000A 1200A 2000A 1200A 2000A 1200A 2000A NOTE ORDERING INSTRUCTIONS 1 Alw...

Page 31: ...1 G 004 0236C0790 G 009 0414A0116 P 004 0121A5964 P 001 006509787 P 001 6 17 15 All All m 16 17 6 All All a 17 All 6 All 4 All All 3 i Right Left 7 All 22 All 3 7 22 All All 3 22 10 All All 3 22 12 All All 3 24 1200 2000 All 1 12 24 All 24 1 24 0121A5964 P 001 0121A5964 P 001 18 1 All 24 1 24 1 24 All B 0236C0791 P 008 0236C0791 P 008 1200 2000 All 2 12 24 24 2 All 24 0114C5382 P 002 0114C5382 P 0...

Page 32: ...GEI 88761 i i t 4 v i i i i 4 30 Courtesy of NationalSwitchgear com ...

Page 33: ...er Interlock Switches Auxiliary Switch Latch Checking Switch Charge Discharge Indicator Power Switches Closing Springs Motor Fuses Closing Latch Roller Closing Latch Switch Cam 1 Trip Coil Open Close Indicator Auxiliary Switch Counter Trip Latch Charge Discharge Indicator Close Button Motor Fuse Prop Spring Trip Lever 2 2 3 3 M Wmm 4 4 i 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 gggf 31 j Courtesy of Nat...

Page 34: ... Spring Blocking Device 5 Driving Pawl 6 Eccentric 7 Closing Spring 8 Manual Charging Wrench 9 Support Bolts 10 Charge Discharge Indicator Latching Pawls Positive Interlock Roller Ratchet Wheel Eccentric Fuse Closing Spring Main Shaft Bearing Cam Shaft Opening Spring Guide Block Lower Spring Pin Upper Spring Pin 1 2 3 5 4 5 6 7 8 9 10 11 12 1 a Courtesy of NationalSwitchgear com ...

Page 35: ...g 22 Guide 23 Stop Pin 24 Main Shaft Bearing 25 Cam Shaft Bearing 10 Trip Latch Roller Support 11 Crank Shaft 12 Cranks 13 Prop Pin 14 Prop 15 Drive Shaft 16 Cam 17 Check Nut 1 Handle 2 Trip Coil Support 3 Trip Coil 4 Trip Armature 5 Prop Reset Spring o Cam Follower Roller 7 Trip Shaft 8 Trip Latch 9 Trip Latch Roller M H 03 03 3 0 UJ C ...

Page 36: ... Latch Spring 17 Release Coil Bolts 18 Release Coll Support 19 Closing Latch Shaft 20 Switch Mounting Bracket tiMStgti 8 14 15 9 2 s VO 10 CO 14 o co M3 16 bo H 11 lx 20 12 M Fig 6 Control Mechanism O CM 00 LTV y or L r o MSN f to iH fH 2 S 3 3 1 00 I 4 6 6 bO H 5 5 Primary Contact Wipe V Arcing Contact Wipe Fig 8 Contact Adjustments 1 Stationary Primary Contacts 4 Stationary Arcing 2 Movable Prim...

Page 37: ...al Barrier 21 Operating Rod 22 Stationary Primary Contacts 23 Movable Primary Contacts 24 Cup Bearing 25 Yoke 26 Movable Contact Arm Assembly 27 Movable Arcing Contact 28 Booster Tube 29 Connection Bar 30 Booster Cylinder and Piston 1 Box Barrier Handle 2 Blow out Core 3 Blow out Coll 4 Arc Runner 5 Pole Piece 6 Stationary Arcing Contact 7 Box Barrier 8 Arc Chute 9 Pole Piece 10 Arc Runner 11 Blow...

Page 38: ...rimary Contacts 6 Movable Primary Contacts 7 Contact Arm 8 Yoke i 1 Operating Rod 2 Operating Rod Pin 3 Adjusting Nut 4 Check Nut Mi Si H t S f on o 00 o rH t to H Pc t7 Rtpl kg 9 m M I V Pig 10 Positive Interlock Switch Shaft 6 Switch Support 7 Latch Checking Switch 8 Switch Arm 9 Trip Shaft f 1 Positive Interlock 2 Switch Arm 3 Interlock Switch 4 Switch Support 5 Auxiliary Switch 36 Courtesy of ...

Page 39: ...ch Arm 11 Latch Set Screw 12 Cotter Pin 13 Prop Spring K 1 o tv cn o 00 rH rH bO H ft Pig 11 Auxiliary Switch and Trip Coil 3 1 Switch Support 2 Latch Checking Switch 3 Switch Arm 4 Trip Latch 5 Reset Pin Stop 6 Latch Roller 7 Latch Roller Link 8 Latch Roller Pin o CM co LT O t rH H CVJ rH bO 1 H i Pig 12 Latch Checking Switch HI 37 Courtesy of NationalSwitchgear com ...

Page 40: ...er Lifting Rail t 00 o 00 oo H bO H Pig 13 Plunger Interlock pi I 4 P K 00 o LO cr r 00 VO 1 Actuating Crank 2 Link 3 Tripping Crank 4 Turnbuckle 5 Spring Release Crank Pig 14 Spring Release Interlock 1 38 5 Courtesy of NationalSwitchgear com ...

Page 41: ...e Piece 4 Assembly Bolt 5 Side Brace 7 Assembly Bolt 8 Lower Brace 9 Assembly Bolt 18 10 Upper Mounting Support 11 Insulating Cap 12 12 Side Shield 13 Assembly Bolt 17 14 Lower Mounting Support 15 Assembly Bolts 13 16 Assembly Bolts 17 Lower Pole Piece 4 18 Upper Insulation 10 v PS i I H o pV o p 1 wmmr m s V ffiai 3 v4 V fern1 r w I I m P i X prM n su iH EV 1 IC W CVI o s 00 t 3 ifB 1 H a VO 5 1 ...

Page 42: ...SSSSS 5 SiS S 3f3g2 5 S BB8BS8SKi i O o 5 J 2IL_ 6 s4 V VO 24 t CVJ v vui o S2 S5 j3 S SSS3 832 nn WA r y 00 r 8 V 1 r i j86RR 53 S r V rH i 9 r SSSSPSWWWWWBB 1 10 bO BLU u H j f V 12 JSPHK JB S aiBW 13 JVi i 14 v f Pig 17 Arc Chute Assembly with Side Removed 1 Upper Mounting Support 2 Connection Bolt 3 Upper Blowout Coil 4 Upper Arc Runner Assembly 5 Upper Arc Runner 6 Side Shield 7 Lower Arc Run...

Page 43: ...rc Chute Mounting Bracket 9 Lower Supporting Bolt 10 Lower Mounting Support 11 Upper Horizontal Barriers 1 Rear Bushing 2 Supporting Bolt 3 Upper Mounting Support 4 Stationary Arcing Contact Assembly 5 Movable Arcing Contact x Mm Ip fn 1 5 VK oo IS oo V v ON CM O co V 5 H CM j 1 0m bO i1 H r V ft JU s feli V 1 Pig 21 Arc Chute Pin Spacing PH s 41 1 5 4 A 3 l i a Courtesy of NationalSwitchgear com ...

Page 44: ...ring Loose rings between bushing and contact arm Clean per instructions and repack with D50H15 lubricant Roller and Needle Bearings Light applica tion of machine Oil SAE 20 or SAE 30 No lubrication required No lubrication required Ground surfaces such as cams ratchet teeth etc Surfaces coated with MoSg Wipe clean and apply D50H15 lubricant Wipe clean and apply D50H15 lubricant Ground surfaces such...

Page 45: ...M V i y j 0 h rfc cvi g i i bO i 1 H s rt Ti fci r i W V 0 V vni to isp vo vo C D t CO 23 Method of Installing Primary Contact Springs Using a Spring Compressor Fig o co 6 Spring Guide Compressor Nut Spring Compressor Spring Retainer Assembly Bolts Spring Contact Support Stop Plate Stationary Primary Finger 1 co CM 7 2 8 3 bO 4 9 H pc 5 f 43 5 fl I 1 A y Courtesy of NationalSwitchgear com ...

Page 46: ...ushing Assembly 1 Contact Springs 2 Stationary Primary Contacts 3 Cup Bearing 4 Contact Arm 5 Movable Primary Contacts 6 Assembly Bolts 7 Movable Arcing Contact 8 Assembly Bolts 9 Connection Bar 10 Piston Assembly 11 Hinge Pin 12 Buffer 1 Rear Bushing 2 Guide and Support for Arc Chute 3 Bolts for Contact Support 4 Contact Support 5 Bolt for Flexible Braid 6 Mounting Bolt 7 Flexible Braid 8 Connect...