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Discuss 3 phase motor wiring at the Commercial and Industrial Electrical within the ElectriciansForums; Hi i have recently reconected a 3 phase fan at my workshop its rotation is correct but it now gets very hot any suggestions?...
- 08-10-2007 #1
3 phase motor wiring
Hi i have recently reconected a 3 phase fan at my workshop its rotation is correct but it now gets very hot any suggestions?
- 25-10-2007 #2
Re: 3 phase motor wiring
Hi,
If the current on each of the three phases is uneven, the polarity of the windings may
be incorrect? ..or you may have connected the motor in the delta configuration instead
of star (6 terminals on motor?)
- 19-02-2008 #3
- 27-02-2008 #4
Re: 3 phase motor wiring
Depends on what starter you were using!!

What is the KW rating of the motor??
Has it got DOL, Star/delta, soft starter, invertor etc for starting?
Is it squirrel cage, wound rotor, reaction etc etc
Some more details would be nice, take a look on the rating plate if you are not sure
- 03-03-2008 #5
Re: 3 phase motor wiring
I agree with what has been said already, sounds like motor is connected in delta. On a standard cage 400/230 3ph motor this means that 400v are across a 230 winding, on a small motor it will start up no problem in delta just it will over heat and eventually fail. Or you could be using a non standard winding like 380/200, really need more info from motor plate/start control.
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