Weirdness in the workshop
December 20, 2013 1:17 AM Subscribe
Is it possible for a 3 phase motor to switch polarity without changing the input wires anywhere?
posted by Kerasia to Grab Bag (14 answers total) 1 user marked this as a favorite
One of three machines on a 3 phase input was running in reverse when we turned it on today, after a few weeks of idleness. The other two on the input, and all other 3 phase equipment in the workshop is working fine. Is there any thing, other than a human switching wires, that could cause the switch in polarity?