derated soft starter
derated soft starter
(OP)
I've got a soft starter rated for 277/480 3PH 3A.
Will using it to start a 208v 3PH motor hurt it or cause it to act any differently?
Also, if I wanted to use it on a single phase motor, would it work since only 2 legs of the 3 phase are controlled anyways?
This is pre-design and obviously I would not use it in real life, I am just researching at this point.
Will using it to start a 208v 3PH motor hurt it or cause it to act any differently?
Also, if I wanted to use it on a single phase motor, would it work since only 2 legs of the 3 phase are controlled anyways?
This is pre-design and obviously I would not use it in real life, I am just researching at this point.





RE: derated soft starter
Theoretically, it is certainly possible to design a soft starter that would allow you to use it on the 208 volts, but with the unit you are considering, you will need to verify this.
The power assembly will not be a problem, but the supply to the electronics may be too low at the lower voltage. It depends what the design range for the control supply is.
No, you can not use a single phase motor on a three phase soft starter. It will almost surely cause issues.
There are single phase soft starters available that can be used.
Best regards,
Mark Empson
http://www.lmphotonics.com
RE: derated soft starter
RE: derated soft starter
Generally though, you will not be able to use a 3 phase soft starter on a 1 phase motor application. The SCR gate timing will be different, even on the versions that use SCRs on only 2 of the 3 legs.
JRaef.com
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