GE Magne-Blast AM-13.8-1000-3H, Instructions Manual

Page 1: ... set JS4 P I i 204v m _ c v ni CONTENTS 5 V y l YT i o t o o 1 introduction Co 9 0 G o o o o c o e r r Receiving Handling and Storage 2 a C e t K o St 9 3 d A t o w Installation Description of Operation 4 3 5 5 0 0 0 0 ft O 0 Adjustments O o ft m 12 General Maintenance 31 Renewal Parts SWITCHGEAR lEPliTiill GENERAL I a Courtesy of NationalSwitchgear com ...

Page 2: ... 8 magne blast breaker is available in a number of current ratings Refer to the breaker nameplate for the complete rating information 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 given on the nameplate Since this book is written to cover several ratin...

Page 3: ... is recommended that the breaker be put into service immediately in its permanent location If this is not possible the following precau tions must be taken to insure the proper storage of the breakers 1 The breaker should be carefully protected against condensation pre ferably by storing it in a warm dry room since water absorption has an adverse effect on the insulation parts Circuit breakers for...

Page 4: ...CHARGED1 and the driving pawl will be Insert the spring blocking device 4 Fig 4 and manually discharge the springs against the pins by pushing the manual release button l Fig 4 The springs are now blocked and slow closing of the breaker contacts can be accomplished by again turning the driving eccentric with a 5 8 ratchet wrench During the slow closing operation check to insure that the mechanism ...

Page 5: ...es three similar pole units each pole unit consisting of main and arcing con tacts an interrupter and an enclosing box barrier that segregates the interrupting units from each other to provide insulation between phases as well as from each phase to ground The primary connections to the associated metal clad equipment are made through the primary disconnect studs n The ML 13 operating mechanism sho...

Page 6: ...ly charged and the control contacts are re set The closing springs may be charged manually if control voltage is lost A p 8 f ratcnet wrench can be used to rotate tne eccentric in a counter clockwise direction until the indicator reads CHARGED1 and the driving pawl no longer engages the ratchet wheel The use of the ratchet wrench provides for maximum safety in the event that control power is sudde...

Page 7: ... from the two opposite inner sur faces of the chute elongate the arc into a gradually deepening serpen tine path so that the electrical resistance in the path of the arc is rapidly increased and the heat from the arc is absorbed resistance reduces both the magnitude and the phase angle of the current g and at an easily current zero the arc path is so long and the gases pro duced by the arc so cool...

Page 8: ...movable primary contact 2 should be 5 l6 or greater This setting has been made in the factory and no adjustment is provided A wipe of less than 5 16 is usually an Vindication that the arcing contacts need to be replaced When making this check also see that the movable arcing contact 5 passes between the sides of the arc chute throat without touching Primary Contact Gap Refer to Fig 9 With the brea...

Page 9: ...g Switch Hi The release latch must be fully re set and the monitoring switch opera ted before the motor will start The switch should be wiped by the striker so that the clearance between the striker and switch mounting bracket 20 Fig 6 is 1 321 or less To obtain this adjustment bend the switch striker Be sure the latch is fully re set before making any adjustments i m Motor and Relay Switches 1 Fi...

Page 10: ... clearance should be approximately equal for both the driving and latching pawls and not less than 015 in either case If adjustment is required for either pawl the springs must first he fully charged and blocked Loosen seven motor support bolts l Fig 15 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 un der...

Page 11: ...eater l Driving and Latching Pawl minimum clearance to ratchet teeth 015 m Latch checking switch contacts make when the gap between the trip latch and the stop pin is l l6fl n Plunger interlock 10 7 32 plus or minus 1 16 I 5 16 or greater gap at primary contacts 5 1 4 5 16 1 8 1200 A 5 13 16 5 16 g Release latch wipe 2 Check all nuts washers bolts cotter pins and terminal connections for tightness...

Page 12: ... The following ranges are standard Nominal Voltage Closing Range Tripping Range Min Min Max Max M 48v d c llOv d c 125v d c 220v d c 250v d e 115v a c 230v a c 34 28 60v d c 125v d c l40v d c 250v d c 2 Ov d c 125v a c 250v a c 50v d c 115v d c 130v d e 230v d c 2 0v d c 125v a c 250v a c 80 60 90 70 160 120 180 140 95 95 190 190 If the closed circuit voltage at the terminals of the coil or motor ...

Page 13: ...MAINTENANCE SPRING BLOCICING DEVICE Periodic Inspection The frequency of periodic inspection should be determined by each opera company on the basis of the number of operations including switch the magnitude of currents Interrupted and any unusual operations ting ing which occur from time to time Operating experience will soon establish a maintenance schedule which will give assurance of proper br...

Page 14: ...lace arc chute lifter 16 over the front bushing on the proper pole and insert pin into the proper hole in the support angle 5 Loosen two upper support bolts 2 Left and right 6 Loosen the lower electrical connection bolt 9 Roll arc chute to the rear of the support platform Lower the grappling hooks 17 by turning handle counter clockwise until the hooks can be placed in the lifting holes provided in...

Page 15: ... other Allow to dry smooth and hard Insulation Test When insulation has been repaired or replaced or when breaker has been stored under adverse conditions it is recommended that the insulation be checked before the breaker is placed in service A standard 60 cycle high potential test at 27 000 volts RMS will normally indicate whether the breaker is satisfactory for service With the breaker contacts...

Page 16: ...me of periodic maintenance and requires no dis assembly The second method outlines a lubrication procedure similar to that performed on the breaker at the factory but should be used only in case of a general overhaul or disassembly for other reasons or if the operation of the breaker becomes slower General Electric Lubricants D50H15 and D50H47 are available in 1 4 col lapsible tubes It is so packa...

Page 17: ...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 leave the bearings in the alcohol for a longer time an inhibit ed alcohol such as is used for anti freeze should be used Even then the bearings should be removed from the alcohol within twenty four hours Esso Anti Freeze and Du Pont Zerone are satisfactory for ...

Page 18: ... stationary con tact fingers and movable contact blocks Badly pitted or burn ed contacts should be replaced Note burned primary contacts indicate the probable need for arcing contact replacement If the contact surfaces are only roughened or galled they should be smoothed with crocus cloth or draw filed After contact dressing the contacts should be greased with a very thin film of G E contact lubri...

Page 19: ... cabinet or the test couplers i 7 S o 9 o C o Every 5000 Operations or Approximately Every Five Years Whlch ever Comes First In addition to the servicing done each 1000 operations the breaker should be given a general inspection and overhaul as required All excessively worn parts in both the mechanism and the breaker should be replaced Such wear will usually be in dicated when the breaker cannot b...

Page 20: ... should be disassembled cleaned and relubricated with G E Contact Lubricant D50H47 Contact rings at the hinge point between the contact blade and bushing may be lubricated for prolonged life The contact rings should be inspected for wear and re placed when reduced in thickness to less than l 32lf 11 The stationary primary contact fingers should be disassembled and the silver plated pivot area of t...

Page 21: ...on Lubricate complete mechanism REMEDY1 2 Damaged or dirty contacts in control circuit REMEDY Recondition or replace contacts f 3 Blown fuse in closing circuit REMEDY Replace blown fuse after determining cause of failure 4 Faulty connection in charging circuit Repair broken or loose wires and see that all binding screws REMEDY are tight Overheating 1 Poor condition of contacts due to lack of atten...

Page 22: ...the section on INSTALLATION IMPORTANTs NISM ADJUSTMENTS MUST BE CHECKED 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 rear5 side and interphase barriers Loosen the two upper support bolts 2 Fig 19 and the one lower connection bolt 9 and roll the arc chute to the rear of the...

Page 23: ...the com ponents 4 The fins of the arc chute should be equally spaced before bolting in place Contacts I The follow I Open the breaker and remove the rear side and interphase barriers and roll arc chute to the rear of platform as previously described move the contacts proceed as follows A Stationary Arcing Contacts 10 Jig 22 1 Disconnect the contact braids from the contact fingers by remov ing two ...

Page 24: ...uide into hole in spring retainer 4 and the round end of spring guide in cutout in primary finger Fig 23C 5 Hold spring assembly firmly in place and remove spring compressor C Movable Arcing Contact 7 _ Pug 24 1 Remove the assembly bolts 8 2 Reassemble in reverse order E Movable Primary Contacts b Fig 24 1200 Amp Breaker 1 Remove the nuts from assembly bolts 6 2 Remove the primary contacts 3 Reass...

Page 25: ...hing measure the dis tance from that particular bushing to adjacent bushings in both direc tions so that it may be reinstalled in the same location 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 a de energized spare metal clad unit before tightening the bushing mounting bolts This ...

Page 26: ...d replace pin il The contact surfaces at the hinge point of the contact blade and bushing should have a thin coating of D50il 47 grease 6 Check all contact adjustments as outlined under ADJUSTMENTS INTERLOCK SWITCH i 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 unde...

Page 27: ...ok 1BB SRK CK SWITCH the connection bar 9 Fig 24 cup bearing 3 and pin ll the four bolts at the mounting flange of the front bushing be removed and lower the bushing frefi all contact adjustments as outlined under ADJUSTMENTS Bl tegemove the interlock switch 3 Fig 10 remove the two mounting jgip S and disconnect the lead wires HgPIlfpheck the switch adjustments as explained under ADJUSTMENTS SllBC...

Page 28: ...hing measure the dis tance from that particular bushing to adjacent bushings in both direc tions so that it may be reinstalled in the same location 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 plac5 ng the breaker in a de energized spare metal clad unit before tightening the bushing mounting bolts This...

Page 29: ...re not removed 7 Reassemble the parts in the reverse order Be sure the latch spring is properly installed and the latch is aligned in the center of the latch roller Check latch adjustment as described under ADJUSTMENTS TRIP LATCH ROLLER BEARING I i 1 Remove 2 cotter pins at ends of shaft 8 Fig 12 2 Partially remove shaft out right side of frame until latch roller b is free 3 Reassemble in reverse ...

Page 30: ...nder DRIVING PAWL ADJUSTMENTS CAM Remove 2 set screws from ratchet wheel 3 Fig 3 and remove wheel from main shaft 8 Remove 2 set screws from cam 12 Fig 1 Remove prop reset spring 10 Fig 2 Remove 2 set screws from cam 16 Fig 5 and move cam to the right on the shaft as far as it will go Slide the shaft to the left until key is fully exposed Remove key and check shaft for burrs Remove shaft out left ...

Page 31: ...e the spring release coil 5 Fig 6 proceed as follows 1 Block the closing springs as described in INSTALLATION 2 Remove the left hand closing spring as described in CLOSING SPRINGS below 3 Remove two mounting bolts 17 coil support l8 and spacers 4 Cut wires at the butt connectors and remove coil 5 Replace the coil and the correct number of fiber spacers before bolt ing support 6 Butt connect wires ...

Page 32: ... is essentially to limit the travel of the con To remove the buffer block assembly remove bolt 9 Fig 14 To disassemble the buffer block 7 remove the two bolts 10 When the buffer is reassembled it should be adjusted as follows 1 Measure primary gap see page 7 2 Measure clearance between bottom of primary finger 1 and buffer block 7 3 The total of both gaps item 1 and 2 above should be 5 5 8 1 to 5 ...

Page 33: ...nd Left apply when facing the raecha NOTE nisra end of the breaker I ORDERING INSTRUCTIONS 1 Always specify the complete nameplate data of both the breaker and the mechanism 2 Specify the quantity catalog number if listed reference number if listed and description of each part ordered and this bulletin number 3 Standard hardware such as screws bolts nuts washers etc Such Items should be purchased ...

Page 34: ...ulation Lower Runner Insulation Arc Chute Throat Arc Chute Throat 7 1200 3000 1200 3000 19 3 ft 3 7 19 22 3 10 3 10 22 Left Right 3 22 All 7 3 All 22 7 3 22 All 24 1200 3000 3 12 24 3 12 24 6 13 All fLeft Right 3 17A All 9 17A All 3 9 Left Right Primary Contact Finger Spring Primary Contact Finger Spring Primary Contact Finger Primary Contact Finger Movable Arcing Contact Movable Arcing Contact Mo...

Page 35: ...5C9393 P 3 10509393 P 2 10509393 P 3 137A7575 P 43 137A7575 P 42 137A7575 P 41 137A7575 P 4 137A7575 P 45 6275070 G i 6275070 G 2 6174582 G l 6174582 G l 6174582 G 15 6174582 0 2 6174582 6 10 6174582 6 14 456A866 P 5 456A866 P 6 10AXQ06 0 4 161A4231 137A9252 161A5909 1 12 All 6 1 12 All 6 250 VDC 1 12 All 6 All 12 1 6 12 All 6 6 1A All ft 6 6 1A All 6 6 250 VDC Lfl All 6 6 1A All 6 6 1A All 1 11 2...

Page 36: ...iliary Switch Latch Checking Switch Charge Discharge Indicator Power Switches Closing Springs Motor Fuses Closing Latch Roller Closing Latch Switch Cam Trip Coil Open Close Indicator Auxiliary Switch Counter Trip Latch Charge Discharge Indicator Close Button Motor Fuse Prop Spring Trip Lever 1 1 2 2 f 3 3 4 o 4 5 5 6 o 7 7 8 8 9 9 10 10 11 11 12 33 Courtesy of NationalSwitchgear com ...

Page 37: ...wl 6 Eccentric 7 Closing Spring Manual Charging Wrench 9 Support Bolts 10 Charge Discharge Indicator Fig 3 Ride Side View ML 13 1 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 2 3 4 4 5 6 7 8 8 9 10 11 12 8 34 Courtesy of NationalSwitchgear com ...

Page 38: ...ng Guide 23 Stop Pin 24 Main Shaft Bearing 25 Cam Shaft Bearing Latch 10 Trip 11 Crank Shaft 12 Cranks 13 Prop Pin 14 Prop 15 Drive 16 Cam 17 Check Nut 1 Handle 2 Trip 3 Trip Coil 4 Trip Armature 5 Prop Reset Spring 6 Cam Follower Roller 7 Trip Shaft 8 Trip Latch 9 Trip latch Roller w Coil Support Shaft pd H 00 CO a o cr u vji ...

Page 39: ...16 Closing Latch Spring 17 Release Coil Bolts 18 Release Coil Support 19 Closing Latch Shaft 20 Switch Mounting Bracket 1 H 15 cn 9 2 o 10 CO o 14 to 19 i 17 16 11 Control Mechanism s H 1 _Jl M rs L llODA tfF iS Co rsoo 16 2 2 3 H 3 H 4 4 fr 6 6 8 5 ro f IG 88 Primary Contact Wipe Fig 8 Contact Adjustments Arcing Contact Wipe 1 Stationary Primary Contacts 2 Movable Primary Contacts 3 Buffer Block ...

Page 40: ...zontal Barrier 19 Operating Rod 20 Stationary Arcing Contact 21 Stationary Primary Contact 22 Movable Primary Contact 23 Movable Contact Arm Assembly 24 Cup Bearing 25 Booster Tube and Piston 26 Front Vertical Barrier 27 Check Nut 28 Connection Bar 29 Booster Cylinder 1 Box Barrier Catch 2 Box Barrier 3 Arc Chute 4 Arc Runner Upper 5 Blow Out Coil Upper o Blow Out Core Upper 7 Movable Arcing Conta...

Page 41: ...y Contacts 7 Contact Arm 8 Yoke 1 Operating Rod 2e Operating Rod Pin So Adjusting Nut 4 Check Nut m hr H I 1 O Cc o if 4 Figc 10 Positive Interlock Switch c Switch Support Latch Checking Switch Switch Arm Trip Shaft 1 Positive Interlock Shaft 2 Switch Arm 3 Interlock Switch 4 Switch Support 5 Auxiliary Switch o 7 8 d Q I 38 Courtesy of NationalSwitchgear com ...

Page 42: ...witch Arm 11 Latch Set Screw 12 Cotter Pin 13 Prop Spring o D CO o CO I l rH P a Fig 11 Auxiliary Switch and Trip Coil W 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 OJ CO in o 1 i i i ft OJ 1 1 bD Brl fe Latch Checking Switch Courtesy of NationalSwitchgear com ...

Page 43: ...CO o u 4 v 4 Fig 13 Plunger Interlock 1 Movable Primary Contact Assembly Bolts Movable Arcing Contact Assembly Bolts Piston Assembly Connection Bar Buffer Block Shims Buffer Assembly Bolt m 2 10 o 3 4 7 a 5 y Oo 3 o 0 o 7 U 4 4 i 8 ro ro 9 5 AT 6 it 4o Courtesy of NationalSwitchgear com ...

Page 44: ...otor Support Retaining Ring Driving Link o 2 7 8 3 4 9 5 10 mk m Assembly Bolts Assembly Bolts Upper Runner Connection Pole Piece Throat Lower Runner Insulation Muffler Side Brace Lower Runner Connection Lower Are Chute Assembly Upper Arc Chute Assembly 1 2 3 4 5 6 7 CM CM 80 CM 9 LH 00 10 o CO 11 m o rH W R te Arc Chute Assembly 4l Courtesy of NationalSwitchgear com ...

Page 45: ... oo 9 VJ1 k ro ir vrrs iB I ro 10 K o 3 11 13 m 12 M te Pig 17 Arc Chute Assembly With Side Brace Removed 2 3 Runner Insulation Runner Connection Bolts Core Bolt Coil Connection Core Upper Runner Connection Runner Throat Lower Runner Insulation Lower Runner Connection Arc Chute Muffler 1 2 ii I VW if 3 m F 4 rl _3 Pjjj llfif I epa S 4v KBL d M Vri L p ffi v K L 5 m ssiftj 5 IBS 6 F 3 raafiwi S 4 f...

Page 46: ...pper Arc Runner 4 Throat 00 o it O 0 G Fig 19 Are Chute Partially Removed Showing Accessibility of Arcing Contacts 5 Lower Arc Runner 6 Lower Coil Connection rH o H 1 Rear Bushing Supporting Bolt Upper Arc Chute Support Movable Arcing Contact Mounting Bolts Arc Chute Muffler Top Plate Bolts Lower Arc Chute Support Lower Connection Upper Horizontal Barriers Lower Horizontal Barriers Stationary Arci...

Page 47: ... No lubrication required ilSi Vji m Mit J Clean per instructidnsllflU and repack with D5 OHi5 lfe lubricant MM Roller and Needle Bearings Light applica tion of machine oil SAE 20 or SAE 30 No lubrication required 4 Si W1B1 i I ii li Wipe clean an app D50H47 Ground surfaces such as cams ratchet teeth etc Surfaces coated with MQS2 No lubrication required Si ay Wipe clean and appl r p D50H15 lubrican...

Page 48: ...2 vS3 A n 7 3 8 9 lllr c Pig 23 Method of Installing Primary Contact Springs Using a Spring Compressor 6 Spring Contact Support 8 Stop Plate Stationary Primary Finger 1 Spring Guide Compressor Nut Spring Compressor Spring Retainer Assembly Bolts 2 7 3 t 111 90 5 fe 45 Courtesy of NationalSwitchgear com ...

Page 49: ... Primary Contacts Cup Bearing Contact Arm Movable Primary Contacts Assembly Bolts Movable Arcing Contact Assembly Bolts Connection Bar Piston Assembly Hinge Pin Buffer Buffer Clamp I Rear Bushing Guide and Support for Arc Chute Bolts for Contact Support Contae Bolt for Flexible Braid Mounting Bolt Flexible Braid Connsction Bolt Stud for Mounting Arcing Fingers Stationary Arcing Contact Assembly In...

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