VFD driven motor shuts down an turns back on automatically

2 replies [Last post]
roper's picture
Joined: 2014-07-21

I have an Avitar 71 VFD on a 100 hp conveyer that intermittently shuts down and turns itself back on. it has happened four times thus far, and every time it happens it is at the same time of day. There has never been a fault and the "trips" are not on consecutive days. It's ramndom, with the exception that it happens at the exact same time of day.

bacamama's picture
Joined: 2013-12-10

Do a power quality analysis on feeder circuit and work backwards to main service. There may be other loads switching at the same time.

Sparky43207's picture
Joined: 2015-04-03

I will agree with the need for a power quality analysis. I suspect that the problem is going to be utility switching.

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