Westinghouse Porcel-line 150 DHP 1000 Instructions Manual Download

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Summary of Contents for Porcel-line 150 DHP 1000

Page 1: ...cuit Breakers Westinghouse Electric Corporation Distribution and Control Business Unit Commercial Operations Division ILS Department Pittsburgh PA 15220 I B 32 253 4B Effective January 1989 Supersedes I B 32 253 4A dated September 1978 Courtesy of NationalSwitchgear com ...

Page 2: ...scribed in this book have been designed and tested to operate within their nameplate ratings Operation outside of these ratings may cause them to fail resulting in bodily injury and property damage Courtesy of NationalSwitchgear com ...

Page 3: ...ards and or Regulations as they may be applied to this type of equipment must be strictly adhered to All possible contingencies which may arise during installation operation or maintenance and all details and variations of this equipment do not purport to be covered by these instructions If further information is desired by purchaser regarding his particular installation operation or maintenance o...

Page 4: ...II J Courtesy of NationalSwitchgear com ...

Page 5: ... Position Indicator and MOC Switch Operating Pin Interlocks IX 1 3 3 5 5 5 7 8 8 9 9 9 13 13 14 14 14 15 17 17 18 18 18 20 20 20 21 21 Breaker Cell Coding Plates Levering in Interlock Anti Close Interlock Floor Tripping and Closing Spring Release Interlocks Rail Latch Barrier Maintenance Handle Control Schemes Undervoltage Trip Attachment Accessories 21 22 22 22 22 22 22 22 24 24 Maintenance Handl...

Page 6: ...l Load Current Switching Duty Moderate to High Level Switching Duty Capacitor Switching Total Breaker Life Changing Duty Considerations Inspection Maintenance Program Reviews Maintenance Procedures Contacts Arc Chute Mechanical Timing Minimum Closing Speed Minimum Contact Separation Mechanism Insulation Lubrication Mechanism Roller Bearings Main Contacts Secondary Contacts Drawout Disconnect Finge...

Page 7: ...rlock Breaker in Housing Levering in Nut and Screw Disengaged 393344 5A Side View Breaker in Housing 393303 Breaker Guide and Rail Latch 393301 Releasing Rail Latch 388824 Breaker in Cell Secondary Contacts Engaged 393314 Operation of Secondary Contacts with Breaker in Test Position Breaker in Cell a Ground Contacts Disengaged b Ground Contacts Engaged Coding Plates Floor Tripping and Closing Spri...

Page 8: ...Mounting Stationary Main Contacts a 1200 Amperes b 2000 Amperes c 3000 Amperes Stationary Arcing Contacts Mount Arc Chute Connect Shunt Strap Barrier Mounting Hit Arc Chute Stationary Main Contacts a 1200 Amperes b 2000 Amperes c 3000 Amperes Stationary Arcing Contacts Mount Arc Chutes Connect Shunt Strap Barrier Mounting Tilt Arc Chute 391343 Stationary Main Contacts a 1200 Amperes b 2000 Amperes...

Page 9: ...ing Contacts Stored Energy Mechanism Parts and Parts list Crank Shaft Subassembly Crank Shaft Subassembly Parts Parts for Close and Trip Linkage Subassembly Spring Charging Motor Assembly Partial Assembled View and Details of 50DHP250 Arc Chute Arcing Contact Assemblies 82 56 83 57 84 57 85 57 57 57 57 86 57 87 60 61 88 62 89 63 90 64 91 65 92 66 67 93 Courtesy of NationalSwitchgear com ...

Page 10: ... YIU A L Courtesy of NationalSwitchgear com ...

Page 11: ...ce capabilities are given in the Rating Table below Table I Type DHP Breaker Rating Table Rated Values Related Required Capabilities Identification Rated Current Values Max Maxi 3 Sec Short and Time Current Capability Nominal Nominal Voltage 3 Phase MVA Voltage Insulation Level Current Rated Rated Inter Permis nipting sible Time Tripping Delay Rated Rated Contin Short Circuit Current Current at 60...

Page 12: ...kV They are equipped with spring stored energy closing mechanisms All primary insulation to ground is porcelain All type DHP circuit breakers have many common features but they will vary in size and detail depending on the specific breaker type number and ratings Fig 1 shows two views of a 150DHP500 breaker Basic Breaker Assembly The basic breaker assembly includes a chassis a control panel an ope...

Page 13: ...breakers may be referred to the nearest Westinghouse Electric Corp Sales Office When making inquiries about type DHP circuit breakers always provide the specific type number continuous current rating mechanism type applicable order numbers breaker shop orders or style numbers date of manufacture and other pertinent information as shown on the circuit breaker nameplate Inquiries can be handled more...

Page 14: ...or maximum safety assemble the arc chutes and barrier on the breaker before inserting it into an energized cell Type DHP circuit breakers are complex high voltage elec trical devices containing high speed high energy operat ing mechanisms They are designed to operate within the current and voltage limitations on the breaker nameplate Do not apply these breakers to systems with currents and or volt...

Page 15: ...an intermediate position in a cell Always have the breaker either in the test disconnect or connected position 15 Be sure breaker is open and closing spring is dis charged before attempting any maintenance 16 Be sure breaker is open and closing spring is dis charged after completing any maintenance 17 Do not attempt to close breaker with maintenance closing handle when closing spring is charged 18...

Page 16: ...nits 8 PL To Lift Breaker Use Lifting Holes and Spreader Bars RECEIVING Upon receipt of the equipment inspect the crates for any signs of damage or rough handling Open the crates care fully to avoid any damage to the contents A nail puller is recommended for this rather than a crow bar 50 DHP Breakers When opening the crates be careful that any loose items or hardware are not discarded with the pa...

Page 17: ...75 arc chute can be handled by one person The 50DHP250 arc chute should be lifted by two people The other arc chutes are provided with lifting lugs so that an overhead lifting device can be used to mount them on the breaker 1200 2 66X32X42 1600 140 2000 2 66X32X42 50X32X32 140 1650 50X32X32 3000 2 66X32X42 1750 140 I50DHP7S0C 1200 3 50X32X40 33X30X50 70X38X42 940 1375 320 33X30X50 70X38X42 2000 3 ...

Page 18: ...ervals is not recommended If unavoidable the outdoor location even though used for a short time must be well drained and a temporary shelter from sun wind rain and snow must be provided Containers should be arranged to permit free circulation of air on all sides and temporary heaters should be used to minimize condensation Moisture can cause rusting of metal parts and deterioration of high voltage...

Page 19: ...VAIL ABLE FOR TRIPPING AN EVALUATION OF THE HAZARDS RELATED TO LACK OF TRIPPING POWER MUST BE MADE BY THE OPERATOR BEFORE CLOS ING A CIRCUIT BREAKER UNDER THESE CONDI TIONS PROTECTIVE RELAYS MAY OPERATE TO ENERGIZE THE TRIP CIRCUIT BUT BREAKER WILL NOT TRIP DUE TO LACK OF TRIPPING POWER MANUAL SPRING CHARGING On all DHP breakers a manual ratcheting lever projects through a slot in the mechanism pa...

Page 20: ...HE MAINTENANCE HANDLE IS SECURELY SEATED ON THE PROJECTING MAIN SHAFT END BEFORE APPLYING CLOSING PRESSURE MANUAL CLOSING After the closing spring has been charged either electri cally or manually the breaker may be closed manually by lifting the spring release plunger behind the plastic guard marked Lift to Close Fig 9 CAUTION KEEP HANDS ARMS HEAD AND TOOLS OUT OF AREA WHERE CONTACTS TRAVEL TO AV...

Page 21: ...ping Latch 3 Center Pole Unit Lever 4 Main Contact Operating Rod 6 Main Link 6 Closing Cam Follower Roller 7 Closing Cam a Crankshaft 9 Tripping Cam b Breaker Open and Gosing Spring Charged a Breaker Open and Gosing Spring Not Charged c BreakerGosed and Closing Spring Not Charged Fig 13 The Four Positions of the Closing Cam and Trip Linkage d Breaker Gosed and Gosing Spring Charged Courtesy of Nat...

Page 22: ...11 Fig 14 Underside of 15 0 kV Breaker 393522 Courtesy of NationalSwitchgear com ...

Page 23: ...1 12 Fig 15 Schematic Views of Spring Charging Parts A Courtesy of NationalSwitchgear com ...

Page 24: ...D ALWAYS BE ENERGIZED AND VERIFIED BEFORE THE CLOSING POWER IS APPLIED I When the closing spring is completely compressed the main crank goes over center and the closing stop roller comes against the closing latch Fig 15a The closing spring is now held in the compressed position It can be released to close the breaker by raising the closing trigger either electrically or manually STORED ENERGY MEC...

Page 25: ...re the auxiliary switch operation counter control relay motor cutoff switch closing spring charge indicator latch check switch breaker position indi cator and breaker nameplate Cams and linkages for the floor tripper assembly are also supported on the mecha nism panel When supplied undervoltage and transformer trip devices are also mounted on the mechanism panel The main stationary contacts on the...

Page 26: ...netic core one near each end The outer terminal of each coil is bolted to one of two center arc horns so that a conducting circuit from one center arc horn to the other is provided through the series connected blowout coils Two main interrupting stacks each comprised of multiple ceramic plates are lo cated at each end of the center arc horn coils and core assembly Front and rear arc horns are situ...

Page 27: ...he arc into two major sections coupled together at the middle through the blowout coils With arc current now flowing through the blowout coils a strong transverse magnetic field is pro duced between the pole faces of the blowout magnet The interaction between arc current and the transverse field produces an upward thrust on the two arc sections forcing each into its adjacent main stack Within the ...

Page 28: ...rlock INTERPHASE BARRIERS The interphase barrier is an assembly of insulating sheets channels and angles all mounted on a steel front plate Figs 1 and 3 show typical barrier assemblies These components are installed as part of the breaker chassis assembly The levering nut is fastened securely to the guide tube and is loosely retained in a housing fastened to the extreme rear of the chassis as show...

Page 29: ...LLER The shutter roller is located on the right side of the breaker chassis Fig 21 Its function is to engage the shut ter operating cam in the cell to raise the shutter over the stationary disconnecting contacts as the breaker is levered from the test position to the engaged position in the cell welded to it which slide in the guide tube slot Thus as the levering in shaft is rotated the guide tube...

Page 30: ...evering in nut and screw When it is desired to lever the breaker into the engaged position from the test position the rail latch is pressed down it can conveniently be done with the foot see Fig 23 and the breaker is pushed into the cell approxi mately 1 4 inch so that the levering device nut and screw can be engaged When the breaker is levered out of the cell and the levering nut and screw have b...

Page 31: ...e hand operating rod goes into the slots in the secondary contact engaging handle as shown in Fig 25 The handle is then pressed down to make Final engagement of the secondary contacts secured to the cell floor in such a position to engage the ground contact when the breaker is pushed into the test position and to remain engaged in all positions of the circuit breaker from the test position to and ...

Page 32: ...S TO PERSON NEL EQUIPMENT AND PROPERTY CAN BE CRE ATED SHOULD ANY OF THE INTERLOCKS BE BY PASSED OR MADE INOPERATIVE 1 Breaker Cell Coding Plates This is a combination of a notched plate in the cell and interference bars on the breaker so that only appropriately rated breakers can be put into the cell Fig 27 If excessive force is applied to the levering in shaft while the interlock key is engaged ...

Page 33: ...tripping elements to open the breaker but the principal mode of operation for all DHP breakers is as follows As soon as the secondary contacts make up the spring charging motor will start to charge the closing spring pro vided control power is available When the spring is com pletely charged the motor cut off switch will turn the motor off The breaker can be closed by closing the con trol switch t...

Page 34: ...erclockwise so that the roller moves to release the tripping lever A torsion spring around the pivot pin of the tripping lever then rotates it counterclockwise causing a linkage on the under side of this lever to trip the breaker As the breaker closes the center pole reset lever moves away from the undervoltage reset lever The tripping lever acted upon by its torsion spring moves counterclockwise ...

Page 35: ... gear order not with the breakers Those directly associ ated with the breaker are 1 Maintenance Handle Used to close the breaker con tacts during maintenance only Also used to manually charge the breaker closing spring 3 Arc Chute Lifter Used to tilt the arc chutes during maintenance so that arc chutes and contacts may be ex amined Not furnished with 50DHP75 and 50DHP250 breakers 4 Levering in Cra...

Page 36: ...25 Fig 32 Contact Adjustments Courtesy of NationalSwitchgear com ...

Page 37: ...ce finger under close release magnet plunger marked Lift to Close and lift See Fig 9 This releases the clos ing latch and closes the breaker a Put the rectangular cutout in the maintenance closing lever over the flats on the breaker main shaft which ex tends thru the right side of the breaker chassis See Fig 12 Slowly push down on the lever to bring the mov ing contacts close to the stationary con...

Page 38: ...taching the side sheets to the breaker chassis are given on the specific Breaker Data Sheets BE SURE BREAKER IS OPEN AND CLOSING SPRING IS DISCHARGED BEFORE STARTING TO ASSEMBLE ARC CHUTES AND BARRIER a Place barrier assembly on breaker Be sure that the barrier is seated as far down and as far back on the breaker chassis as possible The steel panel should be in front of the lip on the barrier moun...

Page 39: ...evering in nut on the breaker to lubricate the screw For general movements of breaker where corners must be turned and for positioning in front of the cell use the turning dolly Place vertical pin of dolly in hole in han dling bracket at bottom and center of mechanism panel by tilting dolly handle sharply toward breaker Push dolly handle down until front wheels of breaker lift off floor Breaker ca...

Page 40: ...SERIOUS DAMAGE OR INJURY 11 Trip Breaker Open Mechanical interlock prevents levering breaker into or out of the cell if breaker is closed 12 Remove Breaker from Operate Position Engage crank on levering device shaft and turn counter clockwise until crank rotates freely Mechanical interlock prevents levering breaker into or out of the cell if breaker is closed If excessive force is applied to the l...

Page 41: ...EXTREME CAUTION MUST BE EXERCISED TO STAY CLEAR OF THE PATH OF THE MOVING CONTACTS AND TO AVOID ACCIDENTAL OPERATION OF THE CLOSING AND TRIPPING TRIGGERS i With the breaker out of the cell remove the transparent plastic cover Lift Plunger to Trip from in front of the tripping trigger and proceed as follows 1 Remove breaker from cell 2 Remove barrier and arch chutes 3 Remove barrier mounting pan Fi...

Page 42: ...l the tripping trigger has reset The switch operating arm is of tough steel and is sub ject to only very light forces It is set at the factory and should remain in adjustment unless tampered with It is adjustable by bending the arm slightly Correct adjust ment is for the switch to make contact when the tripping trigger is 1 8 to 3 16 from its completely reset position measured at the center of the...

Page 43: ...triking the contact to provide the necessary bending effort For stationary arcing contacts of the type shown in Figs 80 and 86 no stress should be ap plied to the riveted extension fastened to the upper side of the contact For multiple fingered stationary main con tacts all fingers on the same side of the assembly must be bent uniformly repeat similar inspect adjust recheck procedures on each of t...

Page 44: ...etration of each main contact assembly is set within 1 16 3 64 inches as shown in Fig 32 HINGE The hinge contact is set at the factory and will require no adjustment unless the main contacts are changed See sec tion on Maintenance Fig 37 Floor Tripper Adjustments 3 Slide adjusting tool under spring release lever Fig 28 and slowly push forward until lever end is resting on 1 2 inch high surface Bre...

Page 45: ... most effective use of this type of maintenance instructions it is important for the user to establish an inspection program that will permit him to routinely examine each circuit breaker after regularly scheduled intervals of operation as well as at discrete times when conditions requiring particular maintenance procedures may be observed Various suggestions are noted below to be used in setting ...

Page 46: ...eaker always be made immediately after a single interrup tion During the inspection following the accumulation of N interruptions attention should be directed to the con dition of arc chutes and of contact assemblies Insulating members as well as general physical and mechanical condi tion should also be checked Refer to appropriate mainte nance instructions in this instruction book for guidance Se...

Page 47: ...urfaces adjacent to the contact assemblies are more susceptible to this condition and the user s inspection maintenance in structions should recognize this These deposits can be electrically conducting and should be removed if detected The maintenance procedure recommended is described under Arc Chutes MODERATE TO HIGH LEVEL SWITCHING DUTY Circuit breakers applied where currents 1000 amperes and l...

Page 48: ...n ongoing inspection maintenance pro gram up to date so that it reflects the experience accumu lated it is suggested that such programs be reviewed on a periodic basis through the life of the circuit breaker The first review should be made following the initial inspec tion after a breaker is placed in service Subsequent re views will depend on the type of application For breakers which accumulate ...

Page 49: ... impair their current carrying ability because of the high contact pres sure After the contacts have been worn and dressed off as above or replaced contact adjustment should be checked Refer to the section on contact adjustment c The burning away of the arc tips causes a change in the arc tip adjustment and the relation of arc tips to main contacts Refer to Fig 32 The distance between new arcing c...

Page 50: ...n the front and rear arc horns Also the dirty surface of the ceramic near the contacts should withstand approximately 10 kV per inch when test prods are placed directly on the ceramic surface When test voltage is applied there should be no luminous display 2 Erosion of Ceramics When an arc strikes a ceramic part in the arc chutes the surface of the ceramic will be melted slightly When solidi fied ...

Page 51: ...arings are packed at the factory with a top grade slow oxidizing grease which normally should be ef fective for many years They should not be disturbed un less there is definite evidence of sluggishness or dirt or unless the parts are dismantled for some reason If it is necessary to disassemble the mechanism the bearings and related parts should be thoroughly cleaned of old grease in a good grease...

Page 52: ...ing spring during the useful life of the mechanism If the spring does have to be changed a Closing Spring Removal Tool 592C864 G01 is available from Westing house To change the closing spring refer to Figs 38 and 39 and proceed as follows 1 Close and trip breaker manually to be sure all springs are discharged 2 Remove barrier and arc chutes 3 Assemble nut thrust bearing thrust washer collar and tu...

Page 53: ...mounted on the breaker Attachment is by bolting the front sheet to the support pan and by bolting the two insulating tabs extending from the bottom rear of the barrier sheets to angle brackets at the rear of the pole units Fig 40 Mount Arc Chute Steel Front Insulating Barrier Barrier Sheets 2 CONNECT SHUNT STRAP FIG 41 CONNECT SHUNT STRAP FROM LOWER CONTACT TO FRONT ARC CHUTE CONNECTION BE SURE CO...

Page 54: ...A TIME MORE THAN ONE TILTED BACK COULD CAUSE BREAKER TO TIP OVER Remove front shunt strap connection and tilt arc chute back against top stud o o Fig 44 Stationary Main Contacts n o o o Fig 45 Stationary Arcing Contacts Fig 43 Tilt Arc Chute Courtesy of NationalSwitchgear com ...

Page 55: ...ehind it and four insulating sheets that go around the three arc chutes and pole units The steel front sheet has a notch in the bottom edge which fits into a clip on the support pan Attachment is by bolting the front sheet to the support pan bolting the two center insulating sheets to the clips behind the pole units and by bolting the two outside insulating sheets to the sides of the breaker See I...

Page 56: ...8 Barrier Mounting o o o o o a b Fig 50 Stationary Main Contacts a 1200 Amp b 2000 Amp and 1200 Amp High Momentary o o o Fig 49 Tilt Arc Chute Fig 51 Stationary Arcing Contacts Courtesy of NationalSwitchgear com ...

Page 57: ...o place on the breaker Because of the close spacing between the arc chutes an arc chute hanger to attach to the arc chute lifting lugs is provided as an accessory Fig 52 Remove all three hinge pins Remove shunt connector hardware Mount the center arc chute first Fig 53 Mount Arc Chute CONNECT SHUNT STRAP FIG 54 Arc Chute Lifting Lugs Arc Chute Hanger CONNECT SHUNT STRAP FROM LOWER CONTACT TO FRONT...

Page 58: ...hree arc chutes and pole units There are insulating deflectors on top of the barrier above the arc chutes The steel front sheet has a notch in the bottom edge which fits Fig 55 Barrier Mounting TILT ARC CHUTE FIG 56 CAUTION TILT ONLY ONE ARC CHUTE AT A TIME MORE THAN ONE ARC CHUTE TILTED COULD CAUSE BREAKER TO TIP OVER Remove bolt from front of arc horn Attach arc chute lifter by placing end of ro...

Page 59: ...lating deflectors on top of the barrier above the arc chutes The steel front sheet has a notch in the bottom edge which fits into a clip on the support pan Attachment is by bolting the front sheet to the support pan and bolting the four side sheets to clips behind the pole units See Installation Section this Instruction Book for method of aligning the barrier LrvJ Fig 59 Mount Arc Chute CONNECT SH...

Page 60: ...ULD CAUSE THE BREAKER TO TIP OVER Attach arc chute lifter by placing end of rod in hole in front of arc chute and positioning retainer Lift arc chute up and position end of prop in hole in casting at base of chute support post See Fig 56 n o o o O O Fig 63 Stationary Arcing Contacts Fig 62 Stationary Main Contacts Courtesy of NationalSwitchgear com ...

Page 61: ...irst The 0 50 diameter bolts should be snug but not tight enough to interfere with raising the arc chute with the arc chute lifter Fig 65 Connect Shunt Strap BARRIER FIG 66 Barrier consists of a steel front sheet with an insulating shield behind it and four insulating sheets that go around the three arc chutes and pole units There are insulating deflectors on top and on the back of the assembly Th...

Page 62: ...BREAKER TO TIP OVER Attach arc chute lifter by placing end of rod in hole in front of arc chute Lift chute up and position end of prop in hole in cast ing at base of chute support post o o o n o o o o o a 1200 Amp b 2000 Amp and 1200 Amp High Momentary o Fig 68 Stationary Arcing Contacts M o c 3000 Amp Fig 67 Stationary Main Contacts Courtesy of NationalSwitchgear com ...

Page 63: ...the arc chutes should be suspended from a crane or chain hoist The center arc chute should be installed first The 0 50 diameter bolts should be snug but not tight enough to interfere with raising the arc chute with the arc chute lifter Fig 70 Connect Shunt Strap BARRIER FIG 71 Barrier consists of a steel front sheet with an insulation shield behind it and four insulating sheets that go around the ...

Page 64: ...ift chute up and position end of prop in hole in cast ing at base of chute support post o o CAUTION TILT ONLY ONE ARC CHUTE AT A TIME MORE THAN ONE ARC CHUTE TILTED COULD CAUSE BREAKER TO TIP OVER a 1200 Amp b 2000 Amp o D O c 3000 Amp Fig 73 Stationary Main Contacts o o I o Fig 72 Tilt Arc Chute Fig 74 Stationary Arcing Contacts Courtesy of NationalSwitchgear com ...

Page 65: ...a steel front sheet with an insulating shield behind it and four insulating sheets that go around the three arc chutes and pole units There are insulating deflectors on the top and on the back of the assembly The back deflector is long enough to extend down below the top of the arc chute The barrier must be lifted high enough for the rear deflector to clear the arc chute when installing or removin...

Page 66: ...ds thru arc chute support o Attach arc chute lifter by placing flat end with four teardrop shaped holes over for special bolts on front of arc chute o o o o Lift chute up and position end of prop in hole in sup port pan b 2000 Amp and 1200 Amp High Momentary a 1200 Amp o o c 3000 Amp ig 79 Stationary Main Contacts Fig 78 Tilt Arc Chute Fig 80 Stationary Arcing Contacts Courtesy of NationalSwitchge...

Page 67: ...rc chute should be mounted first Fig 82 Connect Shunt Strap BARRIER FIG 83 Barrier consists of a steel front sheet with an insulating shield behind it and four insulating sheets that go around the three arc chutes and pole units There are insulating deflectors on the top and on the back of the assembly The back deflector is long enough to extend down below the top of the arc chute The barrier must...

Page 68: ...s from studs thru arc chute support o Attach arc chute lifter by placing flat end with four teardrop shaped holes over for special bolts on front of arc chute o o Lift chute up and position end of prop in hole in sup port pan a 1200 Amp and 2000 Amp o n o b 3000 Amp Fig 85 Stationary Main Contacts o O O O Fig 86 Stationary Arcing Contacts Fig 84 Tilt Arc Chute Courtesy of NationalSwitchgear com ...

Page 69: ...ove along with the style numbers of the parts for the breaker sup plied When available these lists are the preferred source for renewal parts information I 1 6 Complete contact assembly as in Item 5 except typical 2000 amp 4 76 kV Fig 93 1 7 Complete contact assembly as in Item 5 except typical 3000 amp 4 76 kV Fig 93 RECOMMENDED STOCK OF RENEWAL PARTS 1 8 Complete contact assembly as in Item 5 ex...

Page 70: ...lete pole unit less lift rod and disconnecting contact finger clusters typical 1200 amp 4 76 kV Fig 17a 1 I 24 Complete pole unit as in Item 35 except typical 2000 amp 4 76 kV 1 1 59 Ground contact cluster Fig 14 60 Resistor assembly Fig 4 Specify Y relay voltage 1 25 Complete pole unit as in Item 35 except 3000 amp 50DHP350 Fig 17b 26 Complete pole unit as in Item 35 except typical 1200 amp 8 25 ...

Page 71: ...Courtesy of NationalSwitchgear com ...

Page 72: ...Pole Unit Operating Shaft Spacer 13 8 KV 58 Closed Breaker Interlock Adjusting Screw 13 8 KV 59 Levering in Device Interlock Bracket 13 8 KV 60 Spacer for Item 59 61 Pole Unit Operating Lever L H 13 8 KV 62 Opening Spring Lever L H 13 8 KV 63 Pole Unit Operating Shaft Spacer Washers 64 Pole Unit Operating Lever Center 13 8 KV 65 Hardware for Item 59 66 Opening Spring Lever R H 13 8 KV 67 Pole Unit...

Page 73: ...62 i Fig 88 Stored Energy Mechanism Crank Shaft Subassembly Courtesy of NationalSwitchgear com ...

Page 74: ...4 Driving Pawl Spring 25 Driving Pawl Pivot Pin 26 X Washers for Item 25 27 Holding Pawl Stop Pin 28 X Washers for Item 27 29 Manual Ratchet Lever Spring Retainer 30 Spacer Washers 31 Spacer Washers 32 Manual Ratchet Lever 33 Holding Pawl 34 Holding Pawl Spring 35 Holding Pawl Pivot Pin 36 X Washers for Item 35 37 Ratchet Wheel 38 Washer 39 Crank Shaft Bearing Insert 40 Crank Shaft Bearing Inner R...

Page 75: ...or Item 20 23 Closing Trigger 1 Close and Trip Linkage Subassembly 2 Main Closing Link 3 Closing Cam Follower Roller Pin 4 Closing Cam Follower Roller 5 Spacer Washer for Item 3 6 X Washer for Item 3 7 Tripping Cam Connecting Link 8 Tripping Cam 9 Connecting Link Pin 10 X Washer for Item 9 11 Tripping Cam Roller 12 Tripping Cam Roller Pin Fig 90 Stored Energy Mechanism Parts for Oose and Trip Link...

Page 76: ...65 Fig 91 Spring Charging Motor Assembly Courtesy of NationalSwitchgear com ...

Page 77: ...r 66 Fig 92 Partially Assembled View and Details of 50 DH P250 Arc Chute Courtesy of NationalSwitchgear com ...

Page 78: ...g Contact Assembly for 150DHP750C and 150DHP1000 3 Stationary Arcing Contact Mounting Hardware 4 Moving Arcing Contact for All Ratings Except per 5 Below 5 3000 Amp Moving Arcing Contact for 75DHP500 150DHP500 150DHP750C and 150DHP1000 Only 6 Moving Contact Pad Fig 93 Arcing Contact Assemblies Courtesy of NationalSwitchgear com ...

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Westinghouse Porcel-line 150 DHP 1000, Instructions Manual

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