Westinghouse 150VCP1000, Instructions Manual

Page 1: ...ONS BEFORE ATTEMPTING ANY UNPACKING ASSEMBLY OPERATION OR MAINTENANCE OF THE CIRCUIT BREAKERS Westinghouse Electrlc Corporation Switchgear Division East Pittsburgh Pa 15112 LB 32 254 1 B Effective June 1985 Supersedes I B 32 254 lA dated December 1983 Courtesy of NationalSwitchgear com ...

Page 2: ...d in this bookwere designed and tested tooperate within their nameplate ratings Operation outside of these ratings may cause the equipmenttofail resulting in bodilyinjury and property damage l B 32 254 lB Courtesy of NationalSwitchgear com ...

Page 3: ...RIPTION AND OPERATION 13 5 1 INTERRUPTER ASSEMBLY 13 5 1 1 Vacuum Interrupter 13 5 1 2 Contact Wear Gap Indication 13 5 2 MECllANISM GENERAL 14 5 2 1 Operation of Stored Energy Mechanism 14 5 2 2 Interlocks 18 5 2 2 l Breaker Compartment Code Plates 18 5 2 2 2 Anti Close Interlock 18 5 2 2 3 Floor Tripping and Spring Release Interlocks 18 5 2 2 4 Levering Interlock 18 5 2 2 5 Interphase Barrier In...

Page 4: ...Y TEST 24 6 3 CONTACT EROSION 25 6 4 INSULATION GENERAL 25 6 5 INSULATION INTEGRITY CHECK 26 6 6 PRIMARY CIRCUIT RESISTANCE CHECK 26 6 7 MECHANISM CHECK 26 6 8 LUBRICATION 26 7 0 RENEWAL PARTS 27 7 1 RECOMMENDED PARTS 27 7 2 ORDERING INSTRUCTIONS 27 l B 32 254 lB Courtesy of NationalSwitchgear com ...

Page 5: ...e maximum raled devices and should be applied only in accordance with theu nameplate ratings Follow Applica tion Data 3 2 264 for proper application recommendations Satisfactory performance of these breakers is contin gent upon proper application correct installation and adequate maintenance The following instructions will provide information for installation and maintenance for satisfactory opera...

Page 6: ...kers DO NOT work on an energized breaker DO NOT work on a breaker with the secondary test coupler engaged DO NOT work on a closed breaker or a breaker with closing springs charged Breakers are equipped with several safety interlocks DO NOT defeat them This may result in bodily injury or equipment damage DO NOT attempt to close the breaker by hand on a live circuit Always remove the spring charging...

Page 7: ...accessories used with VCP Breakers are shipped with VAC CLAD Switchgear one per order Maintenance Tool used to charge closing springs manually and hft the shutter in breaker compart 1 B 32 254 lB 1 Maintenance Toot 4 Transport Dolly 2 Levering Crank 5 Rall Clamps 3 Test Jumper Fig 2 VCP Breaker Tools and Accessories ment IL may also be used to facilil lte replacement of pole unit assembly Lifting ...

Page 8: ...aker lifting de Fig 3 Breaker Lifting Yoke in Position 1 vice legs to run underneath the crate If the portable Lifter 1s not available any lifter may be used provided that it is rated for at least 1000 lbs When moving the breaker on flat level floors place it on the transport dolly one provided per order Use I he hand holds to align the breaker on the transport dolly rails DO NOT USE primary disco...

Page 9: ...rovided Containers should be ar ranged to permit free circulation of air on all sides and temporary heaters should be used to minimize condensa tion Moisture can cause rusting of metal parts and deteri oration of high voltage insulation A heat level of approx imately 400 watb for each 100 cubic feet of volume is recommended with the heaters distributed uniformly throughout the structure near the f...

Page 10: ...t prevents the insertion of the breaker into the test po sition unless the barrier is already in place The barrier is shipped in the breaker compartment and is held in place with string to protect it from damage during transporta tion REMOVE THJS STRING Having confirmed the breaker compartment compati bility and presence of the interphase barrier connect the male end of the test jumper to the seco...

Page 11: ...l into the slot on the left hand side of escutcheon plate Charge springs with about 20 downward strokes of the handle until a crisp metallic click is heard and closing springs charged discharged indicator shows charged Remove the handle Depress the push to close button The breaker will close as indicated by the breaker contacts closed indicator The closing springs indicator will show dis charged N...

Page 12: ...ical operation check may also be made with the breaker securely resting on transport dolly as shown m Fig JO If a test cabinet is available it may be used to per form the electrical operation check 4 7 BREAKER COMPARTMENT INTERFACE CHECK Remove the rail clamps Using the hand holds push the breaker into the compartment Test position is reached when levering latch under the breaker engages the lever...

Page 13: ... to bring the breaker to the test posi tion This position is indicated by spin free turning of 1 8 32 254 18 the crank Additional turning will not result into any motion of the breaker Remove the crank Make certain tliat the crank is turned counterclockwise until it ts spin free Pull the secondary disconnects forward as far as possi ble Close the break er As before the motor will start and charge ...

Page 14: ...LAD Metal Clad switch gear utilizes vacuum interrupters for interruption and switching functions Vacuum interruption was chosen for VAC CLAD circuit breakers because of the characteristics of vacuum interrupters enclosed interrupter small size and weight interrupting time high speed long life re duced maintenance and environmental compatibility low noise no arc by products and minimum mechanical s...

Page 15: ...chanism stores the closing energy by charging the closing springs and applies the released energy Lo close the breaker charge the contact 1 B 32 254 lB loading spnngs and reset sprmg The mechanism may rest in any one of the four positions shown in Fig 14 as follows a Breaker open closing springs discharged b Breaker open closing springs charged c Breaker closed closing springs discharged d Breaker...

Page 16: ...ing Ratchet 6 Pole Shaft 7 TOC Operator 8 Spring Release Device 15 rotate the pole shaft of the breaker and close the contacts This is possible because the restraining links between the muin link roller and the trip latch prevent the main link roller from moving off the cam to che left The restraining hnks cause the trip latch to pu h against the trip D shaft Fig 14d shows the breaker in the close...

Page 17: ...cing Spring Fixed End 10 Closing Spring Charging Motor 11 Motor Crank 12 Motor Ratchet Lever 13 Drive Pawl 14 Ratchet Wheel 15 Holding Pawl 16 Spring Release Lever 17 Spring Release Coil 18 Closing Latch Roller 19 Cam Shaft 20 Drive Plate Fig 13a Breaker Closed Springs Charged Fig 13b Breaker Open Springs Discharged Fig 13 Stored Energy Mechanism l B 32 254 18 Courtesy of NationalSwitchgear com ...

Page 18: ...5 Trip D Shaft 6 Trip Shaft Lever 7 TripWire 8 Shunt Trip Lever 9 Shunt Trip Coil 10 MOC Operator 11 Cam Shaft 12 Closing Cam 13 Operating Rod 14 Main Link Roller Fig 14b Breaker Open Closing Spring Charged Fig 14d Breaker Closed Closi11g Spring Charged Fig 14 Four Positions ofClosing Cam and Trip Linkage 17 l B 32 254 lB Courtesy of NationalSwitchgear com ...

Page 19: ...cted positions The latch check switch is also held open thus preventing any electrical close signal l B 32 254 lB 2 Permit the breaker to be withdrawn in safe mode breaker open springs discharged when moved from the test to the withdrawn position or vice versa Note that there is never a free discharge of the closing springs that unduely imposes heavy stresses on the mechanism parts 3 Trip the brea...

Page 20: ...sconnect 9 Operating Rod 10 Contact Loading Spring 11 Spring Yoke 12 Bell Crank 13 Primary Disconnect 14 Pole Base When the coil voltage is reduced sufficiently the roller lever spring overcomes the magnetic force between two cores The moving core moves up and rotates the roller lever clockwise so that the roller moves out of the way of the trip lever A torsion spring around the pivot pin of the t...

Page 21: ... lllTIC Breaker Control Switch Close Breaker Control Switch Trip Anti Pump Relay Spring Release Coll Close CollI Spring Charging Motor Trip Coil PR Protective Relay LS Limit Switch Motor Cut off LC Latch Check Switch UV Undervoltage Coil PS Position Switch Mechanically ecrueted to make as breaker moves from test position end to break in connected position as levering in crank is removed Fig 16 Typ...

Page 22: ... to remain engaged in all positions of the circuit breaker from the test position to and including the connected position See Figs 15 and 6 5 2 8 MOC and TOC Switch Operators As shown in Fig 14 the MOC Mechanism Operated Control switch operator 1s coupled to the pole shaft In the test and connected positions of the breaker this operator aligns directly above the MOC switch plungers in the compartm...

Page 23: ...ces the breaker toward the connected position During this travel the floor tripper Trip roller is lifted 1 8 32 254 lB up holding the breaker trip free When the breaker reaches the connected po ition the crank turns Spin Free providing no further breaker movement If the breaker is closed in the connected position the levering crank cannot be engaged After tripping the breaker the levering crank ma...

Page 24: ...nected Position Cage Assembly Test Position Not the Travel 10 31 03 Drive Screw Connected Position 1 I I I I J_ T I I 23 __ _J LEVERING IN DEVICE DRIVE NUT SHOWN IN TEST OR CONNECTED POSITION Fig 18 LeveringDeviceAssembly l B 32 254 18 Courtesy of NationalSwitchgear com ...

Page 25: ...cuum interrupters used in type VCP circuit breakers are highly reliable interrupting elements Satisfactory perfor mance of these devices is dependent upon the integrity of the vacuum in the mterrupter and the internal di I B 32 254 lB electric strength Both these parameters can be readily checked by a one minute 36 KV A 5 high potential test During this test th ioiiowing caution must be ob served ...

Page 26: ...he step on springyoke It is extremely unlikely that the contact erosion will reach 12 inch during normal lifetime of the breaker However in such a case the vacuum interrupter assembly should be replaced 6 4 INSULATION In VCP breakers all primary insulation to ground is porcelain and thus requires minimal maintenance Insula tion maintenance primarily consists of keeping the insulat ing surfaces cle...

Page 27: ...7 MECHANISM Make a careful visual inspection of the mechanism for any loose parts such as bolts nuts pins rings etc Check for 1 B 32 254 lB excessive wear or damage to the breaker components Operate the breaker several times manually and elec trically to make certain the operation is crisp and without any sluggishness 6 8 LUBRJCATION All parts that require lubrication have been lubricated during t...

Page 28: ... 37 kA 3 Hl50VCP500 3000A 58 kA 3 150VCP750 1200A 58 kA 3 Hl50VCP750 1200A 77 kA 3 150VCP750 2000A 58 kA 3 Hl 50VCP750 2000A 77 kA 3 l SOVCP750 3000A 58 kA 3 Hl50VCP750 3000A 77 kA 3 150VCPI000 1200A 77 kA 3 150VCP1000 2000A 77 kA 3 150VCP1000 3000A 77 kA 3 Description Qty 1200 Amp Primary Disconnect 6 2000 Amp Primary Disconnect 6 3000 Amp Primary Disconnect 6 Operating Rods 3 Spring Charging Mot...

Page 29: ...28 Fig 20 1 B 32 254 1B Auxiliary Switches Antipump Relay Spring Charging Motor Spring Release Closing Device Shunt Trip D811ice Courtesy of NationalSwitchgear com ...

Page 30: ...0 3000 1200 18 2000 3000 36 95 1200 28 5 2000 3000 1200 2000 3000 1200 2000 37 3000 I For Reclosing SaNICe the Sym lntorrupllng Capability and other rela1edcaptbllllies aremodified by the rectos Ing capabilityf1ctor obtained from the followuig lormul1 C 1 T1 16 T1 RI 100 tf n 21 15 15 WhereC KA Sym lnterrupllng C pabUlty at lheOpe at Ing Voltage but not1 1han 18 n Tolll No of Openings T1 Ta ttc Tt...

Page 31: ... t Westinghouse Electric Corporation Switchgear Division East Pittsburgh Pa 15112 Printed in U S A Courtesy of NationalSwitchgear com ...