why in single phase only?

hemantkkumar · #1 Jul 23, 2007, 03:21 AM

Why capacitor used in single phase only?

danar · Jul 24, 2007, 08:39 AM

it can be also used in three phase system, to correct the power factor of the three pahse distribution system..

labman · Jul 24, 2007, 09:48 AM

Many single phase motors use a capacitor for starting. I don't remember just why. Back a while ago, tkrussel posted a link to a very exacting explanation in the E&L forum. The search feature works well here, if you can come up with the right key words, you may find it.

I am going to suggest moving this to E&L where he may see it and remember the link to post again.

3 phase power factor capacitors are an entirely different matter. 3 phase motors run fine without them.



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