Eaton W-VAC Series Instructions For Installation, Operation And Maintenance page 55

SYMPTOM
Fails to Trip
• No Trip Sound
• Trip Sound
Undesirably Trips
IB131009EN
INSPECTION AREA
• Control Circuit
• Trip Mechanism
• Trip Mechanism
• Vacuum Interrupter
(One or more Welded)
• Control Circuit
• Mechanism
Instruction Book
CONTROL DEFECTS
• Control Power
(Fuse blown or switch off)
• Secondary Disconnect
• Auxiliary Switch
(a contact no making,
poor or burned)
• Trip Coil
(Burned or open)
• Terminals and Connections
(Poor or burned or open)
• Trip Clapper
(Jammed)
• Trip Bar, Trip Latch
(Jammed)
• Pole Shaft
(Jammed)
• Operating Rod Assembly
(Broken or pins out)
• Control Power
(SD/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)
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