208V 3 phase motors are reversing while powered
208V 3 phase motors are reversing while powered
(OP)
I am having a problem with 2 of 4 208v 3phase motors on a
marina travel lift.All 4 motors are connetcted to the same source.However 2 of the motors are connected by a heavy duty
cord.I have troubleshot most of everything.I have 205v to
each motor but they struggle to run and some times not at all.At one point while they were running they reversed direction by themselves.Could this be an out of phase condition,dirty relay contacts,brushes.???i am stumped
marina travel lift.All 4 motors are connetcted to the same source.However 2 of the motors are connected by a heavy duty
cord.I have troubleshot most of everything.I have 205v to
each motor but they struggle to run and some times not at all.At one point while they were running they reversed direction by themselves.Could this be an out of phase condition,dirty relay contacts,brushes.???i am stumped





RE: 208V 3 phase motors are reversing while powered
Guessing sucks though, so as a way to check this, you should use a phase rotation meter to ensure that all four motors see the same phase rotation. If you don't have one of these, you may try operating the motors independently to see which way they turn. If possible, unplug the cord and operate the lift on two motors. Then, operate the lift on the two motors supplied by the cord. If they direction is the same, then there is a bigger problem. Let us know.......
RE: 208V 3 phase motors are reversing while powered
Most of the time i hear the relays energize and the motors hum.the motors are 3 phase 208v but only have 3 conductors
to each.I cant seem to grasp that.They were running fine
until yesterday and i belive i have eliminated loose
connections,shorts,and the typical good stuff.I hope this
info helps;and again i appretiate yours.
RE: 208V 3 phase motors are reversing while powered
RE: 208V 3 phase motors are reversing while powered
Get someone who knows what to do and let him ( or her ) do it. IMO you tripping over a dollar to pick up a dime. All you have to do is drop on boat, or fail to get it out of the water and you'll probably loose the money it cost to get it fixed correctly.
Knowing when to quite is a good thing.
RE: 208V 3 phase motors are reversing while powered