ABB VHK 20 Installation & Maintenance Instructions Manual Download Page 26 | Manualshive

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IB 6.2.7.7-3

APPENDIX

2

6

CONTACT PRESSURE (MODEL 21 AND 80)

FIGURE A9

THIN FLAT STRAIGHT
EDGE TO MARK
PUSHROD.
STRAIGHT EDGE SHOULD
BE WIDE ENOUGH TO
REST ON FLAT SURFACE
OF MOLDED CHAIR
ASSEMBLY.

PUSHROD

PUSHROD
PIN

MOLDED CHAIR
ASSEMBLY

APPROX.
6 INCHES

APPROX.
3.25 INCHES
WIDE

APPROX
.065”
THICK

CONTACT WIPE

CONTACT
(WIPE) SPRING

TRUNION
BLOCK

NUT

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Summary of Contents for VHK 20

Page 1: ... Jan 99 I N S T A L L A T I O N M A I N T E N A N C E I N S T R U C T I O N S Medium Voltage Vacuum Power Circuit Breakers VHK Model 20 21 VHKR Model 80 Model 21 ABB Power T D Company Inc Distribution Systems Division MM ...

Page 2: ...L FROM DISCONNECT POSITION 9 SAFE OPERATIONS RECOMMENDATIONS 9 ADJUSTMENTS TESTS AND PERIODIC MAINTENANCE 9 INSULATION CLEANING 10 DC MILLIVOLT DROP TEST MICRO OHM TEST 10 CONTACT WEAR AND CONTACT PRESSURE 10 CONTACT GAP 10 Contact Gap Check 11 CONTACT SEQUENCING 11 CLOSING AND OPENING TIMES 12 CLOSING AND OPENING SPEEDS 12 Operating Mechanism 13 Trip Latch Engagement Bite 13 CONTROL DEVICE 13 CLO...

Page 3: ...TCH ENGAGEMENT ADJUSTMENT 27 FIGURE A11 CONTROL DEVICE ADJUSTMENT 28 FIGURE A12 TYPICAL DC SCHEMATIC OF CONTROL CIRCUIT 29 FIGURE A13 TYPICAL AC SCHEMATIC OF CONTROL CIRCUIT 30 TABLE A1 CONTROL CIRCUIT OPERATING VOLTAGE RANGE 31 TABLE A2 CONTROL CIRCUIT TYPICAL CURRENT VALUES 31 TABLE A3 VHK OPERATING PARAMETERS 32 These instructions do not purport to cover all details or variations nor to provide...

Page 4: ...ing material If any shortage of material is discovered promptly notify the nearest District Office Information specifying the purchase order number device serial numbers and part numbers of the damaged or missing parts should accompany the claim The circuit breaker should be installed in its permanent location as soon as possible If the breaker is not to placed into service for some time it is adv...

Page 5: ...e of the interrupter Barrier and Insulation Inspection All barriers and insulated parts should be checked for damage Any dust or dirt should be removed by compressed air or with a clean lint free cloth If these parts have become contaminated with any heavy dirt or grease a clean lintless cloth saturated with alcohol should be used The lead support moldings are polyester glass and occasionally have...

Page 6: ...tion A When in the WITHDRAW position the Closing Springs will discharge automatically If the Closing Springs have been previously charged they will discharge when the racking mechanism reaches this position This is accomplished by a linkage activated by an Adjusting Screw on a welded tab at the center of the Rack Shaft This pulls the Discharge Link Assembly which releases the Close Latch to its un...

Page 7: ...e breaker and then press the Manual Trip Button NOTE If the breaker does not trip the Trip Latch and or linkage is at fault Contact the Customer Service Center for assistance NOTE When the Racking Mechanism is between the WITHDRAW DISCONNECT TEST or CONNECT positions the Manual Trip Button should have a slight amount of play so as not to Bottom Out The Adjustable Link and the Link to Trip Lever Se...

Page 8: ...to electrically charge the Closing Springs If a Motor Disconnect Switch was not provided the Closing Springs will automatically charge when the breaker approaches the TEST position Check for proper operation by closing and opening tripping the circuit breaker both electrically and mechanically This includes control switches relays etc WARNING For safety when racking the circuit breaker to or from ...

Page 9: ...ded that the circuit breaker be inspected after the first 1000 mechanical operations and on a yearly basis unless environmental considerations and operating experience indicate that more or less frequent inspections are appropriate Vacuum interrupters as used on the VHK vacuum circuit breakers have an inherently long contact life and will provide trouble free service under varied application condi...

Page 10: ... k a Tulips are to be included in the test path a 2 000 0 005 diameter smooth 62rms copper conductor must be inserted into the open end of each Primary Disconnect to achieve the proper contact pressure Contact Wear and Contact Pressure Contact Wipe The amount of contact wear can be determined by measuring what is referred to as Contact Wipe or overtravel This can be accomplished by closing the bre...

Page 11: ...pment and procedure are correct Also consider especially when testing with electronic equipment that multiple 2 millisecond vacuum interrupter contact bounces are permissible during normal closing and these bounces can influence the contact time measurements If there are any questions consult the factory If it is determined that the contact sequence is not within 4 milliseconds adjustment is requi...

Page 12: ... wander by as much as 4ms due to the current zeroes associated with such currents Below 0 C the closing times will increase but with no reduction in closing force and opening times will usually be within the limits Adjustments to correct times if found to be outside limits are critical and the nearest District Office should be contacted for recommendations Closing and Opening Speeds The Closing an...

Page 13: ...While any adjustments tests and or periodic maintenance is being performed it is recommended that the grease for those parts be examined If the grease should become contaminated or unduly oxidized hardened and darkened or if parts are replaced any relubrication should be done with the same lubricant available from ABB as part number 712994 C00 1 LB can Note the following The mechanism should be pe...

Page 14: ...cuit dielectric withstand tests on isolated interrupters with open contacts above rated voltage unless test personnel are adequately shielded or they are no less than six feet from the test unit It is to be noted that no hazardous X radiation is produced with closed contacts at any test voltage nor with open contacts at rated voltage and there should be no cause for concern If the breaker is teste...

Page 15: ...h contacts LSb closes and switch contact LSa opens 4 When limit switch LSb in the motor circuit closes the spring charging motor is energized which in turn recharges the closing springs 5 When the circuit breaker closes all auxiliary switch b contacts open and all auxiliary switch a contacts close 6 When the limit switch contact LSb closes the lockout relay coil Y is energized and opens lockout re...

Page 16: ...out as long as the Close signal is maintained This is because the maintained control power on disconnects 03 or 7 puts resistor R1 in parallel with lockout coil Y The additional current flow through parallel resistors R2 R3 and the associated increased voltage drop leaves insufficient voltage to pick up the lockout relay The purpose of the lockout relay is to prevent pumping of the circuit breaker...

Page 17: ...and all detailed operational instructions are attached to the devices RENEWAL PARTS Only those renewal parts that will be required to insure proper and timely maintenance for normal operation of the VHK vacuum circuit breakers are recommended to be stocked Copies of the applicable Renewal Parts Bulletin for specific circuit breakers will be furnished on request from the Component Sales Department ...

Page 18: ...B 6 2 7 7 3 APPENDIX 1 8 CIRCUIT BREAKER ASSEMBLY WITH LIFTING YOKE INSTALLED FIGURE A1 LIFTING YOKE ASSEMBLY FRONT COVER FRONT COVER MOUNTING HARDWARE FIFTH WHEEL HOLE LIFTING YOKE MOUNTING TEE HANDLES ...

Page 19: ...APPENDIX IB 6 2 7 7 3I 1 9 CIRCUIT BREAKER REAR MODEL 21 FIGURE A2 INTERRUPTER INSULATED VACUUM ENVELOPE MID BAND RING PRIMARY DISCONNECTS A K A TULIPS ...

Page 20: ...IB 6 2 7 7 3 APPENDIX 2 0 FRONT CIRCUIT BREAKER PANEL MODEL 21 FIGURE A3 MANUAL TRIP BUTTON MANUAL CLOSE LEVER MANUAL DISCONNECT LEVER MOTOR DISCONNECT SWITCH OPERATIONS COUNTER CLOSE OPEN INDICATOR ...

Page 21: ...2 1 LOCAL ELECTRICAL CLOSE AND TRIP FRONT CIRCUIT BREAKER PANEL ACCESSORIES MODEL 80 FIGURE A4 OPERATIONS COUNTER CLOSE OPEN INDICATOR SLOT FOR MANUAL CHARGE LEVER MANUAL CLOSE LEVER MANUAL TRIP BUTTON MOTOR DISCONNECT SWITCH ...

Page 22: ...THE MOTOR CRANK IS IN THE POSITION AS SHOWN FOR RYOBI STYLE MOTOR THE EXPOSED COMMUTATOR MAY BE PHYSICALLY ROTATED IN ODER TO MOVE THE CRANK AS SHOWN 2 INSERT THE MANUAL CHARGING HANDLE AS SHOWN 3 VERIFY THAT THE BUMPS ON THE HANDLE ARE ENGAGED INTO THE CHARGING PAWL CARRIER 4 HOLDING THE HANDLE PERPENDICULAR TO THE PAWL CARRIER LIFT UP CAREFULLY DO NOT ALLOW LATERAL MOTION OF THE HANDLE 5 LISTEN ...

Page 23: ... IB 6 2 7 7 3I 2 3 RACKING MECHANISM FIGURE A6 SPRING DISCHARGE ADJUSTING SCREW LINK TO TRIP LEVER BLOCKING LOCK BRACKET ADJUSTABLE LINK BLOCKING LEVER LOCATED BEHING PLATE RELEASE LEVER RACK SCREW PADLOCK HASP ...

Page 24: ...IB 6 2 7 7 3 APPENDIX 2 4 RACKING MECHANISM FINAL ADJUSTMENT FIGURE A7 0 010 0 031 ADJUSTING SCREW RACKING SHAFT DISCHARGE LINK ASSEMBLY ...

Page 25: ...APPENDIX IB 6 2 7 7 3I 2 5 METHOD OF RACKING CIRCUIT BREAKER FIGURE A8 1 BREAKER CELL DOOR 2 ACCESS DOOR TO RACKING MECHANISM 3 RACK RELEASE LEVER 4 RACKING CRANK ...

Page 26: ...IN FLAT STRAIGHT EDGE TO MARK PUSHROD STRAIGHT EDGE SHOULD BE WIDE ENOUGH TO REST ON FLAT SURFACE OF MOLDED CHAIR ASSEMBLY PUSHROD PUSHROD PIN MOLDED CHAIR ASSEMBLY APPROX 6 INCHES APPROX 3 25 INCHES WIDE APPROX 065 THICK CONTACT WIPE CONTACT WIPE SPRING TRUNION BLOCK NUT ...

Page 27: ...APPENDIX IB 6 2 7 7 3I 2 7 TRIP LATCH ENGAGEMENT ADJUSTMENT FIGURE A10 ...

Page 28: ...TROL DEVICE ADJUSTMENT FIGURE A11 1 ROLLER CLOSE LATCH 2 CHARGING CAM 3 ACTUATOR LIMIT SWITCH 4 CONTROL DEVICE 5 CLOSE LATCH RELEASE ROD 6 SPRING CLOSE LATCH RELEASE ROD 7 SECONDARY CLOSE LATCH 8 PRIMARY CLOSE LATCH 1 2 3 4 5 6 8 7 ...

Page 29: ...are Discharged Closed When Springs are charged LSb Limit Switch Contact Closed When Springs Are Discharged Open When Springs are Charged TC Shunt Trip Coil X Closing Latch Release Coil Y Contol Relay Lockout Coil Ya Normally Open Relay Contact Yb Normally Closed Control Relay Contact TB Terminal Block Point ML Motor Lead CE Coil Lead End C1 C2 Terminal Jumper Control Device Female Secondary Discon...

Page 30: ...sm is Reset 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 TC Shunt Trip Coil X Closing Latch Release Coil Y Contol Relay Lockout Coil Ya Normally Open Relay Contact Yb Normally Closed Control Relay Contact TB Terminal Block Point ML Motor Lead CE Coil Lead End C1 C2...

Page 31: ...280 VDC 150 200 VDC 75 150 VDC 120 VAC 104 127 VAC 104 127 VAC 104 127 VAC 69 92 VAC 35 69 VAC 240 VAC 208 254 VAC 208 254 VAC 208 254 VAC 140 180 VAC 69 140 VAC Table A2 Control Circuit Typical Current Values NOMINAL CONTROL VOLTAGE SPRING CHARGING MOTOR AMPS CLOSE COIL AMPS TRIP COIL AMPS LOCKOUT COIL AMPS UNDER VOLTAGE AMPS N E C FUSE AMPS 24 VDC 22 0 22 0 0 30 0 9 30 48 VDC 10 0 10 7 3 1 0 15 ...

Page 32: ... MIN WIPE INCHES NEW BREAKER 0 093 0 101 0 093 0 101 0 093 0 101 0 093 0 101 0 093 0 101 MAXIMUM MV DROP 8 MAX 1200 7 MAX 2000 8 MAX 1200 7 MAX 2000 8 MAX 1200 7 MAX 2000 8 MAX 1200 7 MAX 2000 8 MAX 1200 7 MAX 2000 MAXIMUM MICRO OHMS 40 MAX 1200 35 MAX 2000 40 MAX 1200 35 MAX 2000 40 MAX 1200 35 MAX 2000 40 MAX 1200 35 MAX 2000 40 MAX 1200 35 MAX 2000 IF CLOSING TIME IS OUT OF RANGE CLOSING SPEED ...

Page 33: ...APPENDIX IB 6 2 7 7 3I 3 3 ...

Page 34: ...rters Switchgear Systems Circuit Breaker Operations IEC Products Systems OEM Components After market Components KIRKTM Interlock Systems 201 Hickman Drive 2300 Mechanicsville Highway Sanford FL 32771 Florence SC 29501 407 323 8220 843 665 4144 407 322 8934 Fax 843 667 5109 Fax ...

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