Quote Originally Posted by timebuilder View Post
If the voltages between the phases are correct, you should be able to change direction and have no toasting of the motor.

Maybe there is a more detailed explanation of the sequence of events???
wolfdogs post # 22 after yours is the correct answer. Switch A phase with C phase to reverse but leave B alone.

The "sequence of events" was i replaced a 3 Phase RTU blower motor, same as old one, and added a motor starter. I needed to reverse the direction so i just picked any two phases and reversed. The starter tripped out. I took my amp probe and found the amps on each phase were way out of wack. Like 5-2.5-0 on each of the 3 phases. I then reversed things back and used the other phase. Guess what all 3 phases even out and no tripping overload.
I don't understand it completely myself and maybe wolfdog can explan it in more detail.