BBC 15HK500 Installation & Maintenance Instructions Manual Download | Manualshive

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Courtesy of NationalSwitchgear.com

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Summary of Contents for 15HK500

Page 1: ...T E Medium Voltage Power Circuit Breakers i Type 7 5HK500 15HK500 and 15HK750 1200 thru 3000 Amperes 7500 and 15000 Volts wsm t I it WHPHL i M V T Z as i 1 X iz m i 2 Vi u t I m M n Z j m Mi if m A T scivir m mm m rAv 5 mmm JlpA y m m a Courtesy of NationalSwitchgear com ...

Page 2: ...ISCONNECT Position 4 3 Removal From Switchboard 4 4 Safe Operation Recommendations 5 MAINTENANCE AND ADJUSTMENTS 5 1 General Information 5 2 Contact Pressure 5 3 Contact and Insulation Cleaning 5 4 Millivolt Drop Test 5 5 Puffers 5 6 Bridge Pivot Pressure 5 7 Closing and Opening Times 5 8 Arc Chutes 5 9 Operating Mechanism 5 10 Control Relay Adjustment 5 11 Racking Mechanism 5 12 Lubrication 5 13 ...

Page 3: ...h handling is evident file a damage claim at once with the carrier and promptly notify the nearest District Office The company is not responsible for damage of goods after delivery to the carrier However we will lend assistance if notified of claims Unpack circuit breakers as soon as possible after re ceipt If unpacking is delayed difficulty may be ex perienced in making a claim for damages not ev...

Page 4: ... install ing the circuit breaker into the switchboard Even though the circuit breaker is completely adjusted and tested at the factory shipping and handling conditions could cause defects 3 3 REMOVING INTERPHASE BARRIERS See Figure 3 Remove two lower front sheet screws 9 and lift front sheet up and away from the breaker Remove arc chute tie bar 6 at upper front of arc chutes Pivot rear brace 1 at ...

Page 5: ...left interphase barriers 3 as marked in place between the lead support mold ings and inside of clips on the outside moldings and pivot rear brace downward behind the arc chutes 2 Install the arc chute tie bar at the upper front on the arc chutes 3 Lift front sheet in place so that it hooks over arc chute tie baf 4 Secure barrier front sheet in place with two lower front sheet screws Fig 4 Method o...

Page 6: ...acitor or reactor switching operations or for motor starting applications it is recommended that the circuit breakers be inspected after 1000 opera tions because of the switching severity If however after the first inspection period there is no indication of any problem actual operating experience can dictate the inspection cycle Regarding maintenance recommendations follow ing fault duty referenc...

Page 7: ...he bridge arm toward the open position 4 Continue the slow close operation to fully dose the breaker Each pole should have approximately 7 64 to 3 16 main contact compression measured at A between the edge of the metal stop plate and the main contact stop This dimension measured on either side is sufficient A rod or drill of these sizes can be used for measuring Complete charging the springs and r...

Page 8: ...d covered by this instruction book from terminal to terminal exclusive of the primary disconnects 5 6 IMOTE For optimum performance of the circuit breakers during periods of increased loading it is recommended that the listed values be met After all above steps have been taken and the milli volt drop is still excessive contact the district office for recommendations 5 5 PUFFERS 5 Fiqure 1 WARNING ...

Page 9: ...e limits Adjustments to correct speeds if found to be outside limits are critical and our district office should be contacted for recommendations 5 8 ARC CHUTES The arc chutes should be inspected internally to insure that no breakage occurred to liner plates or arc plates Further there may be a crust formed on the liner plates if local current interruptions were close to the continuous current rat...

Page 10: ...d and no lubrication is required 5 13 DIELECTRIC TESTS If it is desired to make dielectric tests during main tenance periods the following test values should be used These are to be applied for a one minute period CONTROL LEVER STOP However even the finest greases have a LIMIT SWITCH CRANK CONTROL DEVICE Fig 7 Control Relay 5 11 RACKING MECHANISM See Figure 8 The circuit breaker racking mechanism ...

Page 11: ...ective Y Coi Circuit low or improper Voltage Applied Undervoltage not operating When Supplied Replace Close CM Assembly Defective Close Cofl Assembly Section 6 ELECTRICAL OPERATING SEQUENCE Please refer to the specific schematic diagrams and other operational information furnished with your order Figure 9 is provided as a typical schematic for gen eral information on electrical operation with DC c...

Page 12: ...hen Breaker Is Closed LCb Latch Check Switch Contact Closed When Breaker Operating Mechanism 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 _ Control Relay Lockout Coil Ya Normally Open Control Relay Contact ...

Page 13: ...nished insures that the operating mechanism must be reset prior to energizing the closing latch release coil X 11 The remote mounted capacitor trip feature if furnished provides an electrical energy storage network whereby should a loss of control power occur at the instant of a tripping signal sufficient energy will be furnished to insure an electrical trip ping operation 12 The stopping device s...

Page 14: ...IB 6 2 2 7 1 Page t4 SERVICE NOTES Courtesy of NationalSwitchgear com ...

Page 15: ...IB 6 2 2 7 1 Page t5 SERVICE NOTES Courtesy of NationalSwitchgear com ...

Page 16: ...BBC BROWN BOVERI BBC Brown Boveri Inc Circuit Breaker Division W Columbia SC 29169 Supersedes Issue B Printed in U S A 3M CMC 185 i P i Courtesy of NationalSwitchgear com ...

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