Went to sawmill today, checked contactors and looks like 2 of them missing 1 connection when testing continuity. Pulled them off and after inspection found that 1 contact inside is broken (looks like melted and broken). Didn't inspect the other 2 but will do that soon :)
Thanks for answers!
@WAROSS No, its stopped working after not being used for a long time. I guess there might be a problem with contactors/overload relay. Faulty contactors produces buzzing so sound I hear may not be from the motor.
I checked voltage between 1-2 1-3 2-3 phases and all showed ~400V. Didn't check to neutral but as I know 3 phase motor don't use it. Main 3 fuses are ok, same voltage before/after fuses. Sawmill is 30km from where I live, so I want to get there knowing what to check. I found a video in youtube...
Hello. My father has a sawmill but after not using it for a while now there is a problem. When turned on it humming/buzzing but engine does not rotate. Engine uses 3 phases and all of it coming to the main fuses. Saw is rotating easily with hand so it's not jammed.
I am not an expert in motors...
