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Member Since 22 Oct 2007
Offline Last Active Nov 07 2007 08:48 PM

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Power Factor Capacitor Question

07 November 2007 - 08:52 PM

I have two single phase, 120V motors in parallel. One is a 3/4 hp(10.4A) and the other is a 1/4hp(4A). I need to know what size capacitor to put in parallel with them to help aid power factor. The cap will be controlled by a microprocessor. If anyone knows the size or formulas for calculating the size please let me know.

Power Factor Circuit Help

22 October 2007 - 02:44 AM

I am designing a circuit to demonstrate the effects of capacitors on the power factor. I have a couple different single-phase motors (120V) that will manually be switched on. I have a relay to engage the capacitors when the power factor drops below a certain level. I have everything so far that I need for the demonstration but I can not figure out a way to have a device measure the power factor and energize/de-energize my relay to turn on my cap bank. If anyone could help with this it would be greatly appreciated