i have an ac motor with a voltage rating of 200 volts. I don't have any 200 volt power source, would it run on a 220 volt power source?

 

Originally posted by guitaricci@Apr 28 2006, 10:11 AM
i have an ac motor with a voltage rating of 200 volts. I don't have any 200 volt power source, would it run on a 220 volt power source?

[post=16654]Quoted post[/post]​

It depends on what you think the 200 volts refers to. If 200 Volts AC is a peak rating then I would hesitate to connect it to a source of 220 VAC - RMS since the peak voltage will be about 312 VAC PEAK. If the rating is an RMS rating you might get away with using it on a 220 source, but it might get hot and have a shorter lifespan.

What you need is a transformer called a Variac. It is an adjustable AC/AC transformer that will take 220 VAC in and give an adjustable 0-220 VAC out

 

As All motors are rated in rms and NEMA MG 1 allows motors to be operated in a voltage band of +/- 10 percent; you are perfectly safe to apply 220 VAC to a 200 VAC nameplated motor. Kelly