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I.B. 3A74792H08
Page 45
Effective
09/2014
6-13
TROUBLESHOOTING CHART (Continued Next Page)
SYMPTOM
INSPECTION AREA
PROBABLE DEFECTS
Fails To Close
• Closing Spring charged but
circuit breaker does not close
• No Closing Sound
(Close Coil does
not pick up)
• Control Power
(Fuse blown or switch off)
• Secondary Disconnects
• Anti-Pump Relay
(Y relay N. C. contact open or
burned or relay picks up)
• Close Coil
(Open or burned)
• Latch Check Switch
(Contact open-bad switch or
trip bar not reset)
• Auxiliary Switch
(b contact open or burned)
• Motor Cut-off
(Contacts open or burned)
• Trip Coil Assembly
(Clapper fails to reset)
• Closing Sound
but no close
• Pole Shaft
(Not open fully)
• Trip Latch Reset Spring
(Damaged or Missing)
• Trip Bar-D Shaft
(Fails to remain reset)
• Trip Latch-Hatchet
(Fails to remain reset)
• Trip Floor Tripper
(Fails to remain reset)
• Close Latch
(Binding)
• Close Latch Roller
(Binding)
• Trip Circuit Energized
Summary of Contents for 380 VCP-W 21
Page 2: ......
Page 13: ...I B 3A74792H08 Page 7 Effective 09 2014 ...
Page 22: ...Page 16 I B 3A74792H08 Effective 09 2014 Figure 3 7 Typical VCP W 38kV Escutcheon ...
Page 23: ...I B 3A74792H08 Page 17 Effective 09 2014 Figure 3 8 Typical VCP W 38kV Escutcheon ...
Page 33: ...I B 3A74792H08 Page 27 Effective 09 2014 compartment Figure 5 5 Charging Schematic ...
Page 38: ...Page 32 I B 3A74792H08 Effective 09 2014 Figure 5 10 Undervoltage Trip Device Configuration ...
Page 60: ...Page 54 I B 3A74792H08 Effective 09 2014 ...
Page 62: ...Page 56 I B 3A74792H08 Effective 09 2014 Style 3A74792H08 Printed in USA ...