Eaton Cutler-Hammer VCP-WR Series 18, Instructions For The Use, Operation And Maintenance

Page: 49 / 63

I.B. 8295A61H03
Page 43
Effective 7/97
SYMPTOM INSPECTION AREA PROBABLE DEFECTS
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 Bar, Trip Latch
(Jammed)
• Trip Sound • Trip Mechanism • Pole Shaft
But No Trip (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)