Eaton 50VCPW-ND250 Installation, Operation And Maintenance Manual page 53
Vacuum circuit breake
vcp-w series;
vcpw-se series;
vcpw-nd series
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I.B. 32-255-1G
6-11 TROUBLESHOOTING CHART
SYMPTOM
Fails To Trip
• Trip Sound
But No Trip
Undesirably Trips
Effective 12/02
INSPECTION AREA
• Trip Mechanism
• Vacuum Interrupter
(One or more Welded)
• Control Circuit
• Mechanism
PROBABLE DEFECTS
• Trip Bar, Trip Latch
(Jammed)
• Pole Shaft
(Jammed)
• Operating Rod Assembly
(Broken or pins out)
• Control Power
(CS/T Switch, remains made)
• Trip Coil Clapper
(Not resetting)
• Trip Bar or Trip Latch
(Poor engagement of mating
or worn surfaces)
• Trip Bar Reset Spring
(Loss of torque)
Page 45
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Troubleshooting
