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4000 Amp Bus Failure

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IndustrialElect

Electrical
Dec 17, 2013
8
Hi All,
Has anyone had any issues with 4000 amp (Spectra) bus Duct failures? The plant I am working at has had two failures in the past year. One failure occurred just outside the mcc rm., and the other occurred just inside the mcc rm. wall. The faults seem to have occurred in the same general location on the bus duct. The issues seems to be with the 3/8" insulated bolt nearest the end of a buss section. I'm am curious, if there were any other incidents with the same issues in the recent past. The Bus Duct is only about two years old, and the Plant E/I engineer has a lot of concern about personal safety. Thanks for any feed back.
 
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I don't have any experience with outdoor bus installations so this may be way off-base, but if I understand correctly; you have an outdoor failure and a failure just inside the building. Do you have moisture problems, either water intrusion or condensation? Maybe running down these bolts?
 
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