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Page 46
I.B. 3A74792H08
Effective
09/2014
6-12 TROUBLESHOOTING CHART
SYMPTOM
INSPECTION AREA
PROBABLE DEFECTS
Undesirably Closes
•
Control Circuit
• Close Circuit
(CS/C Getting Shorted)
•
Mechanism
• Close Release Latch
(Fails to reset)
• Close Floor Tripper
(Fails to reset)
Fails To Trip
• No Trip Sound
• Control Circuit
• Control Power
(Fuse blown or switch off)
• Secondary Disconnect
• Auxiliary Switch
(a contact not making, poor or burned)
• Trip Coil
(Burned or open)
• Terminals and Connections
(Poor or burned or open)
• Trip Mechanism
• Trip Clapper
(Jammed)
• Trip Sound
But No Trip
• Trip Mechanism
• Trip Bar, Trip Latch
(Jammed)
• Pole Shaft
(Jammed)
• Operating Rod Assembly
(Broken or pins out)
• Vacuum Interrupter
(One or more welded)
Undesirably Trips
• Control Circuit
• Control Power
(CS/T Switch, remains made)
• Mechanism
• Trip Coil Clapper
(Not resetting)
• Trip Bar or Trip Latch
(Poor engagement of mating
or worn surfaces)
• Trip Bar Reset Spring
(Loss of torque)
Содержание 380 VCP-W 16
Страница 2: ......
Страница 13: ...I B 3A74792H08 Page 7 Effective 09 2014...
Страница 19: ...I B 3A74792H08 Page 13 Effective 09 2014 Figure 3 4 Front View VCP W 38kV Drawout Vacuum Circuit Breaker...
Страница 21: ...I B 3A74792H08 Page 15 Effective 09 2014 Figure 3 6 Rear View VCP W 38kV Drawout Vacuum Circuit Breaker...
Страница 22: ...Page 16 I B 3A74792H08 Effective 09 2014 Figure 3 7 Typical VCP W 38kV Escutcheon...
Страница 23: ...I B 3A74792H08 Page 17 Effective 09 2014 Figure 3 8 Typical VCP W 38kV Escutcheon...
Страница 33: ...I B 3A74792H08 Page 27 Effective 09 2014 compartment Figure 5 5 Charging Schematic...
Страница 34: ...Page 28 I B 3A74792H08 Effective 09 2014 Figure 5 6 Typical VCP W DC and AC Control Schematics Drawout...
Страница 35: ...I B 3A74792H08 Page 29 Effective 09 2014 Figure 5 7 Typical VCP WR DC and AC Control Schematics Fixed...
Страница 38: ...Page 32 I B 3A74792H08 Effective 09 2014 Figure 5 10 Undervoltage Trip Device Configuration...
Страница 41: ...I B 3A74792H08 Page 35 Effective 09 2014 Figure 6 1 Lubrication Points Drawout Circuit Breaker Shown...
Страница 60: ...Page 54 I B 3A74792H08 Effective 09 2014...
Страница 62: ...Page 56 I B 3A74792H08 Effective 09 2014 Style 3A74792H08 Printed in USA...