ABB VHK-R Installation & Maintenance Instructions Manual Download | Manualshive

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Courtesy of NationalSwitchgear.com

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Summary of Contents for VHK-R

Page 1: ... Voltage Vacuum Power Circuit Breakers Type VHK R 250 500 and 750 MVA 1200 2000 Amperes 5000 15000 Volts Shown on manufacturing wheel channels JL IIII MPII ABB Power Distribution Inc Circuit Breaker Division ASEA BROWN BOVERI Courtesy of NationalSwitchgear com ...

Page 2: ...ct Adjustment and Timing Contact Adjustment Closing and Opening Times and Speeds Operating Mechanism Latch Engagement Bite Control Relay Adjustment LUBRICATION DIELECTRIC TESTS ELECTRICAL CHARACTERISTICS ELECTRICAL OPERATING SEQUENCE DC Operating Sequence DC Schematic Diagram of Control Circuit AC Operating Sequence AC Schematic Diagram of Control Circuit RENEWAL PARTS 3 3 3 3 3 3 5 5 5 5 5 6 6 6 ...

Page 3: ...istrict Office Informa tion specifying the purchase order number and part numbers of the damaged or missing parts should accompany the claim v k grounding stick snouid be usee to ciscnarge the mid banc on me vacuum interrupters 1 so sou ooad before snv vc cone cr the interrupters Theinsulated vacuumenvelope 2 shouldbeexaminedcarefully for cracks inthe area of the metal to insulation seals onboth e...

Page 4: ...r o n OPERATIONS COUNTER ir OPEN CLOSE II INDICATOR yth MANUAL CHARGE POR U N_l W L j 4 Fig 2 Front Circuit Breaker Panel Accessories See Detail 2A Fig 1 Circuit Breaker Rear 5KV breaker shown Lower leads for 15KV breaker are slightly higher Detail 2A Manual Charging Of Electrically Operated Circuit Breakers Fig 3 Contact Pressure Courtesy of NationalSwitchgear com ...

Page 5: ...s that are noted are required only whenanoperationalcheck indicates aproblem Of course during the maintenance checks all accessible bolts units and screws should be routinely checked to insure that they are tight D C Millivolt Drop Test During maintenance periods the condition of the breaker current circuit can easily bedeterminedby performing amillivoltdroptest This test should be performed regar...

Page 6: ...ntact Wipe contact pressure Check See Fig 3 The contact air gap and contact wipe is set at the factory by settingthe vertical position of the interrupter 1 and the vertical position of the pushrod 2 These parts should not be repositioned in the field unless a pushrod change is required to correct contact sequence as described elsewhere Contact wipe is set at the factory at 093minimum Contact erosi...

Page 7: ... 3 2 turns Control Device See Fig 5 Operating Mechanism The control device is adjusted before leaving the factory It is recommended that no attempt be made to adjust the internal relays andcontactsof thisdevice inthefield If replacement of the controldeviceisrequired thecloselatchreleaserod 5 overtravel may be adjusted as described below The various mechanism adjustments described in the following...

Page 8: ...e grease The mechanism should be periodically inspected for lubrication contamination frequency of inspection is dependant on operating environment 2 Do not use light oil to lubricate any mechanism parts In emergency situations Anderol 732 may be used as a temporary lubricant In these cases allow time for the solvents to evaporate prior to any mechanical operations It is mandatory that the breaker...

Page 9: ...operation DC CLOSING OPERATING SEQUENCE 8 Thecircuit breakercanbetrippedby operationof thetripcontrol switch which energizes the circuit breaker trip coil TC through the auxiliary switch a contact With the circuit breaker open the closing springs uncharged and the control power source energized and motor disconnect switch closed operation occurs as follows 9 The undervoltage device if furnished pr...

Page 10: ... Reset Option LSa Limit Switch Contact Open When Springs Are Discharged Closed When Springs Are Charged LSb Limit Switch Contact Closed When Springs Are Discharged Open When Springs Are Charged Shunt Trip Coil Control Relay Release Coil Control Relay Lockout Coil Normally Open Control Relay Contact Normally Closed Control Relay Contact Terminal Block Point Motor Lead Coil Lead End C1 C2 Terminal J...

Page 11: ...normally open lockout relay contact Ya and the limit switch contact LSa The latch release coil X releases the closing latch The springs then discharge to close the circuit breaker 3 When the springs discharge limit switch contact LSb closes and limit switch contact LSa opens 4 When limit switch contact LSb in the motor circuit closes the spring charging motor is energized which in turn recharges t...

Page 12: ...elay Contact Terminal Block Point ML Motor Lead Coil Lead End C1 C2 Terminal Jumper Control Device I Female Secondary Disconnect Contact R1 R2 Resistors X Auxiliary Switch Contact Closed When Breaker Is Closed Auxiliary Switch Contact Open When Breaker Is Closed l_Ct Latch Check Switch Contact Closed When Breaker Operating Mechanism Is Reset Option LSa Limit Switch Contact Open When Springs Are Di...

Page 13: ...ty of assemblies and items recommended in these bulletins are predicated on infrequent replacement of parts based on accumulated tests and operating experience Total assemblies are recommendedfor fast replacement when it is necessary to return the breaker to service as quickly as possible Replaced assemblies can be returned to the factory for nominal reconditioning The bulletins contain specific p...

Page 14: ... V t A Courtesy of NationalSwitchgear com ...

Page 15: ... quantity of assemblies and items recommended in these bulletins are predicated on infrequent replacement of parts based on accumulated tests and operating experience Totalassemblies are recommended for fast replacement when it is necessary to return the breaker to service as quickly as possible Replaced assemblies can be returned to the factory for nominal reconditioning The bulletins contain spe...

Page 16: ...BOVERI ASEA BROWN BOVERI INC ABB Power Distribution Inc Circuit Breaker Division P O Box 100524 Florence South Carolina 29501 Printed in U S A 50C Phone 803 665 4144 Telecopier 803 664 0520 i Courtesy of NationalSwitchgear com ...

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