Eaton B20B-VR Series Instructions Manual page 37

SYMPTOM
FAILS TO CLOSE
• Closing Springs not charged
breaker does not close
UNDESIRABLY CLOSES
IB01301018E
Instructions for VR-Series
Replacement Breakers for
Westinghouse Type B20B/B22B
INSPECTION AREA
• Control Circuit
(Close Coil does not pick up)
• Closing Sound
But no Close
• Control Circuit
• Mechanism
For more information visit: www.EatonElectrical.com
I.B. 94A1994R01
Effective: April 2005
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 Assy.
(Clapper fails to reset)
• Pole Shaft
(Not open fully)
• Trip Latch Reset Spring
(Damaged or missing)
• Trip Bar-D Shaft
(Fail 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)
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