GE ML-14-0, Instructions Manual

Page 1: ...ATING MECHANISM t TYPE ML 14 0 r i FOR OIL BLAST CIRCUIT BREAKERS sj W Ms iv s CONTENTS Introduction Receiving Handling and Storage Description Installation Operation Maintenance Replacement Parts 3 3 3 5 22 25 33 GENERAL ELECTRIC Courtesy of NationalSwitchgear com ...

Page 2: ... Breaker 8C Permissive Control Switch Opened by manual tripping device on the mechanism Hand Reset to Close ACR Recloser Interlocking Relay and Contacts for 79 Recloser Timing Motor Clutch Release Unit and Contacts for 79 Anti pump Unit and Contacts for 79 69 8H 8T 79 E 43A M i 52 R V Normally Open Auxiliary Switch Open when 52 is open Normally Closed Auxiliary Switch Closed when 52 is open Closin...

Page 3: ...ical equipment Immediately overlooked while unpacking Always not taken place and to insure good mech upon receipt of a mechanism an examin search the packing material for hardware anical condition If possible the space ation should be made for any damage that may have loosened in transit sustained during shipment If injury or rough handling is evident a damage claim should be filed with the transp...

Page 4: ...cking Device Operation Counter Trip Coil 52TC Operation Counter Window Lock out Switch 69 Device Bushing Current Transformer Terminal Boards Manual Trip Lever Trip Latch Roller Manual Trip Push Button Ratchet Wheel 13 1 House Support Bracket 2 Breaker Vertical Operating Rod 3 Auxiliary Switch 4 Output Crank 5 Prop Reset Spring 6 Trip Latch 7 Charge discharge Indicator 8 Guide Block 9 Motor Limit S...

Page 5: ...late in housing into position on the breaker If the mechanism and housing are tank Next install the vertical operating shipped separately or the mechanism and ro j The length of the operating rod housing have been removed from the be adjusted by means of right and left breaker for shipment then it is necessary hand threaded couplings on the ends to to fasten the mechanism and housing in obtain the...

Page 6: ... unit Manual operation of the mechanism should not be attempted until the bearing surfaces of the mechanism have been checked for lubrication Refer to the section on lubrication for the proper oils and greases TRIP LATCH WIPE MANUAL OPENING Refer to Fig 10 and to U Fig 13 The wipe of the trip latch 50 Fig 10 on the trip latch roller 52 should be from 3 16 inch to 1 4 inch This can be measured by p...

Page 7: ...ccentric 9 Manual Charging Stud 5 8 inch hex 10 Driving Link 11 Right Closing Spring 12 Closing Spring Blocking Device 13 Access Plate Customer s Wiring 14 Output Crank Main Shaft 15 Output Coupling 16 Latching And Safety Pawls 17 Ratchet Wheel 18 CamShaft 19 Guide Block 20 Closing Coil 52CC 21 Closing Coil Plunger Instruction Book 23 Weatherstrip 24 Trip Latch Blocking Pin CLOSING LATCH MONITORIN...

Page 8: ...riker Closing Latch Control Panel Control House Heater Circuit Fused Pullout Cutoff and Anti pump Relay 52Y Trip Latch Blocking Pin Motor Circuit Fused Pullout When Required 19 20 21 1 Output Coupling 2 Limit Switch Cam 3 CamShaft 4 Closing Circuit Fused Pullout 5 Trip Circuit Fused Pullout 6 Terminal Boards 7 Control House Heater 8 House Support Bracket 9 Auxiliary Switch 10 Prop Reset Spring Fig...

Page 9: ...s 00 W 3 V v C s r 0 X I Manual Close Push Rod Spring charging Motor Ratchet Wheel Driving Pawl Motor Mounting Bolts 1 6 Eccentric 7 Manual ChargingStud 5 8 Inch Hex 8 Driving Link 9 Motor Support and Bearing Housing 2 3 4 5 Fig 5 Driving Elements 9 Courtesy of NationalSwitchgear com ...

Page 10: ... minimum FKA and or internal stops at their minimums FK and or shortening of the vertical operating rod AUXILIARY SWITCH TYPE SB 12 Refer to Fig 11 and to L Fig 15 The auxiliary switch 19 Fig 11 is mounted on the left side of the operating mechanism frame 2 The linkage 59 attached to the pin 40 Fig 10 of the output crank 4 operates the auxiliary switch shaft which opens and closes the a and b cont...

Page 11: ...ng Lever Trip Shaft Retaining Cotter Pin Trip Latch Trip Latch Stop Pin Trip Coil Support Bracket 1 Trip Coil Positioning Shims Trip Coil Trip Coil Positioning Shims Lock out Device 69 Switch Trip Coil Link Trip Crank Trip Crank Adjustment Bolt Manual Trip Lever Trip Latch Shaft Trip Latch Set Screw 10 2 11 3 12 4 13 5 14 15 6 16 7 17 8 18 9 19 Fig 7 Tripping Devices 11 Courtesy of NationalSwitchg...

Page 12: ... normally when operated elec trically and that the springs can be charged manually or electrically Refer to Fig 12 and to P and Q Fig 14 The driving pawl 74 Fig 12 must advance the ratchet wheel 73 sufficiently on each stroke to allow the latching pawl 70 to fall into the ratchet teeth of the ratchet wheel This should be checked with a major portion of the closing spring load against the driving m...

Page 13: ...r and motor mount assem bly in 1 64 inch increments as a small movement here results in a large move ment at the pawls Be certain the motor have a 0 015 to 0 030 inch clearance above the teeth of the ratchet wheel 73 when the closing spring 62 and 79 Fig II are completely charged H Fig 14 This is checked with the closing springs completely closed and gagged by measuring the distance between the ou...

Page 14: ...Button 34 Spring charging Motor 35 Mechanism Frame Tie Rod 36 Vertical Operating Rod Lower Coupling 37 Cam Follower Roller 38 Closing Prop 39 Cam 40 Linkage to Output Crankshaft 41 Upper Link 42 Trip Coil 43 Trip Coil Plunger 44 Lock out Switch 69 device 45 Trip Coil Linkage 15 Closing Coil Plunger 16 Closing Latch Monitoring Switch 17 Closing Latch Spring 18 Operation Counter 19 Auxiliary Switch ...

Page 15: ...ng 97 Driving Pawl Bushing 98 Driving Crank Bushing 99 Sprocket Shaft Bushing 100 Trip Latch Blocking Pin Hole 101 Locking Nut 102 Trip Latch Roller Shaft Bearing 68 Cam Follower Roller Shaft 69 Latching and Safety Pawls Adjustment Screw 70 Latching Pawl 71 Trip Coil Linkage Adjustment Allen Head Bolt 72 Manual Trip Lever 73 Ratchet Wheel 74 Driving Pawl 75 Driving Crank 76 Driving Eccentric 77 Ma...

Page 16: ...tch Roller Motor Limit Switches Motor Support Bracket Motor Support Bracket Bolts Manual Close Push Rod Button Spring charging Motor Mechanism Frame Tie Rod Vertical Operating Rod Lower Coupling Cam Follower Roller Closing Prop Cam Linkage to Output Crankshaft Upper Link Trip Coil Trip Coil Plunger Lock out Switch 69 device Trip Coil Linkage Mechanism Frame Tie Rod Trip Latch Spring Trip Crank Low...

Page 17: ... of the Mechanism in the Latch Closed Position Bolt 86 Latching and Safety Pawls Adjustment Locknut 87 Driving Pawl Return Spring 88 Cam Shaft Bearing 89 Mechanism House Adjusting Bolt and Locknut 90 Closing Latch Bearing 91 Left Guide Block Bearing 92 Right Guide Block Bearing 93 Sprocket 94 Driving Chain 95 Driving Eccentric Bearing 96 Driving Link Bushing 97 Driving Pawl Bushing 98 Driving Cran...

Page 18: ...ting lever 5 Fig 7 and the trip latch checking switch 22 Fig 9 Bend the trip latch checking switch operating lever 23 Fig 9 as necessary to adjust T EN 8 HEAD BOLT XJ s o CO 8 X3 CO TRIP COIL PLUNGER to Refer to Fig 10 and S Fig 13 The plunger 43 of the trip coil 42 must have a minimum of 1 8 inch free travel before the trip latch 50 starts to move to provide proper tripping at reduced voltages Th...

Page 19: ...ruction book FINAL INSPECTION After the mechanism has been install ed with all mechanical and electrical Fig 14 Right Side View Adjustment and Final Clearance Checks CLOSING COIL PLUNGER N j g Refer to Fig 9 and F Fig 15 The pj closing coil plunger 15 of the closing p coil 13 must have a minimum of 1 8 inch free travel before the tang of the 5 closing latch is contacted If this free travel is less...

Page 20: ... tightened 2 and that all washers and cotter g pins are in place with cotter pin ends effectively bent over oo o CQ D Inspect all wiring for damage 2 during installation work check terminal connections for loose screws and test for possible grounds or short circuits E See that all bearing surfaces and D P4 o Fig 14B Sectional View Showing Adjustment Q O i I F L i wm U Fig 14C Sectional View Showin...

Page 21: ...e binding or friction and that the breaker can be moved to the fully opened and fully closed positions 36 52v d c 90 130v d c 180 260v d c 95 125v a c 190 250V a c 48v d c 125v d c 2S0v d c 115v a c 230v a c 28 60v d c 70 140v d c 140 280v d c 95 125v ac 190 250v a c If the closed circuit voltage at the terminals of the coil or motor does not fall in the specified range check the voltage at the so...

Page 22: ...ring discharged t The driving pawl 4 Fig 5 advances the ratchet wheel 17 Fig 3 only a few degrees each stroke where it is held in position by the latching and safety pawls 16 Fig 3 When the ratchet wheel has been rotated approximately 180 degrees the closing springs 11 and 22 Fig 3 will be fully compressed As the ratchet wheel continues to rotate the spring load will shift overcenter and attempt t...

Page 23: ... closing latch 8 Fig 9 is rotated away from the closing latch roller 29 Fig 9 per mitting the springs to discharge The energy of the springs is applied to the rotation of a cam 39 Fig 10 which closes the breaker through a simple link age that remains trip free at all times A monitoring switch 3 Fig 6 operated by the closing latch 8 Fig 9 will start the spring charging motor 34 Fig 9 after it is fu...

Page 24: ...haft Bearing Inner Race 19 Latching and Safety Pawl Bushing 20 Driving Eccentric Bushing 21 Trip Latch Roller Bearing Inner Race 22 Trip Latch Roller Bearing Outer Race 23 Cam Follower Roller Bearing Inner Race 24 Cam Follower Roller Bearing Outer Race t Q t rr Hi 00 10 I il 00 tn ON O o M l U ROTATED 90 FROM NORMAL POSITION S m r Y 15 i NOTE When replacing bronze bushings in the linkage frequentl...

Page 25: ...er is opened after springs the cam 39 Fig 10 is in the position of the dotted cam shown in Fig 18 This is due to the motor not forcing MAINTENANCE 3 Use the connection diagram accompanying the operating mechanism in all cases when testing and connecting the mech anism 4 When making adjustments in the mechanism or breaker make certain that the closing springs are blocked as described under MANUAL C...

Page 26: ...nk Shaft Bushing 13 Closing Latch Shaft Bearing 14 Driving Crank Bushing 15 Driving Pawl Bushing 16 Driving Link Bushing j 17 Driving Eccentric Shaft Bearing Outer Race 18 Driving Eccentric Shaft Bearing Inner Race 19 Latching and Safety Pawl Bushing 20 Driving Eccentric Bushing 21 Trip Latch Roller Bearing Inner Race 22 Trip Latch Roller Bearing Outer Race 23 Cam Follower Roller Bearing Inner Rac...

Page 27: ...ing eccentric to sprocket shaft S Latching and safety shaft U Prop spacer and reset spring pin 9 f a 10 n a H 9 8 VIEW T 10 CO 00 11 2 r 8 f fu i ai O O S 9 I P l J c 2S Yr I 4 r i f I IE 5 sc wi r JL r 5 G jrr sTs U U r Shaft and Pin Identification I i um c Ur J 0 h V LZ fTT 5 12 12 I Tf BKSSH 13 NOTE When replacing bronze bushings in the linkage frequently the bushings will require reaming to pe...

Page 28: ...ating rod pin and contain with a washer and cotter pin Put the jack on the platform with shims underneath to remove clearance between the top of the jack and the frame ROLLER AND NEEDLE BEARINGS A definite lubrication schedule All the roller and needle bearings for should be set up taking into consideration example the cam follower bearings 23 the frequency of operation of the mech and 24 Fig 20 t...

Page 29: ...ner race the bearing can usually be cleaned satisfactorily with petroleum solvent or a similar cleaner and a stiff brush Follow the procedure outlined above using a light machine oil and G E lubricant D50H15 before reassembling the inner race and shaft NOTE If it becomes neces sary to clean the bearings in alcohol shellac thinner be sure the alcohol is perfectly clean and do not allow the bearings...

Page 30: ...NGS TO RECHARGE 2 Remove the two mounting bolts 28 Fig 9 from the switch support 16 Fig 4 Driving motor inoperative due to lack of power REMEDY Check and replace fuses after determining cause of blown fuses l FAILURE TO CLOSE OR LATCH CLOSED 3 Remove the two mounting screws of the lower switch a ii Mechanism binding or sticking caused by lack of lubrication REMEDY Lubricate complete mechanism 1 4 ...

Page 31: ...PORT Remove the two cotter pins at the ends of the shaft 54 Fig L 3 Remove the two mounting bolts which fasten the closing coil 20 Fig 3 support bracket to the mechanism frame 2 Fig 9 and remove the shims above and below the closing coil 1 To remove the motor support 9 Fig 5 first remove the closing latch spring 17 Fig 9 10 2 Partially remove the shaft out the right side of the frame 2 Fig 9 until...

Page 32: ...e shaft 3 Fig 4 as far as it will go Slide the cam shaft to the left until the key is fully exposed Remove the key and check the shaft for burrs Remove any burrs before removing the shaft from the frame 6 Reassemble in the 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 7 ...

Page 33: ... removal of the left spring 12 Fig 2 5 Either open the operating mech anism by pushing the manual trip lever or block the breaker in the closed position with a suit able blocking device a I CLOSING SPRINGS The closing springs 12 and 28 Fig 2 can be removed as follows 1 Charge the springs with the manual charging wrench and apply the spring blocking device 13 and 30 Fig 2 as de scribed in INSTALLAT...

Page 34: ...turn Spring Lock out Switch 69 Device Ratchet Wheel Guide Block Bearing Outer Race Guide Block Bearing Inner Race Control House Heater 115v a c Control House Heater 230v a c Prop Reset Spring Motor Limit Switches normally open Rear Motor Limit Switch normally closed Cutoff and Anti pump Relay 52Y 48v d c 12HGA35A3 Cutoff and Anti pump Relay 52Y 125v d c 12HGA35A2 Cutoff and Anti pump Relay 52Y 250...

Page 35: ...Bearing Needle Bearing Driving Crank Bushing Bronze Driving Pawl Bushing Bronze Driving Link Bushing Bronze Driving Eccentric Shaft Bearing Outer Race Roller Bearing Driving Eccentric Shaft Bearing Inner Race Roller Bearing Latching and Safety Pawl Bushing Bronze Driving Eccentric Bushing Bronze Trip Latch Roller Bearing Inner Race Trip Latch Roller Bearing Outer Race Cam Follower Roller Bearing I...

Page 36: ...VT5V O 4 GENERAL ELECTRIC COMPANY SWITCHGEAR BUSINESS DEPARTMENT PHILADELPHIA PA 19142 GENERAL ELECTRIC Courtesy of NationalSwitchgear com ...