MCB miniature circuit breaker 480 delta
MCB miniature circuit breaker 480 delta
(OP)
I am working on electrical design of a machine panel supplied by customer 480V delta. They are asking for circuit breakers for the motor connections and while stumbling around learning the difference between UL489 and UL1077, I also noticed MCB (miniature circuit breakers) do not list ratings for 480 delta only 480 wye. I am curious to know the technical reasoning behind this? As it looks now, I am going to request deviation to use fuses for the 3/4 hp motor protection. The customer previously used a 480 wye MCB for the 480 volt delta connection, I understand this to be a common mistake and should not be done. Can someone offer some details to the MCB and if the 480 delta is okay?






RE: MCB miniature circuit breaker 480 delta
RE: MCB miniature circuit breaker 480 delta
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David Castor
www.cvoes.com
RE: MCB miniature circuit breaker 480 delta
RE: MCB miniature circuit breaker 480 delta
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