Eaton Cutler-Hammer VCP-WR 18 Series Instructions For The Use, Operation And Maintenance page 48
Red line vacuum circuit breaker elements
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Page 42
SYMPTOM
Fails To Close
• Closing Spring charged but
breaker does not close
Undesirably Closes
INSPECTION AREA
• No Closing Sound
(Close Coil does not pick up)
• Closing Sound
but no close
• Control Circuit
• Mechanism
I.B. 8295A61H03
PROBABLE DEFECTS
• 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)
• 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
• Close Circuit
(CS/C Getting Shorted)
• Close Release Latch
(Fails to reset)
• Close Floor Tripper
(Fails to reset)
Effective 7/97
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