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Subject:
Power Factor Controller
Category: Science > Instruments and Methods Asked by: niconet2k-ga List Price: $2.00 |
Posted:
27 Aug 2005 15:02 PDT
Expires: 26 Sep 2005 15:02 PDT Question ID: 561223 |
I am looking for small power factor controllers, much like this one here on ebay: http://www.niconet2k.com/~nicodemus/ebaymirror/pfc/eBayISAPI.html I've looked all over on the web and can't seem to find anything, except for large scale power factor controllers. I've tried finding this Watt Wizard company that makes this one, but I can't find anything on them. |
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There is no answer at this time. |
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Subject:
Re: Power Factor Controller
From: formica34-ga on 27 Aug 2005 19:00 PDT |
That device looks pretty shady to me - I wouldn't be surprised if it didn't actually do much. What does it mean to "save up to 60-percent of your electrical usage"? Almost every residential consumer is billed by real power, not apparent power, so their power factor doesn't affect their power bill. Large industrial or commercial power consumers do get penalized for bad power factor, but this device will be too small to do anything for large industrial or commercial equipment. Looking at the picture on the box, it says "Induction Motor Economiser". This probably means it's designed to correct the power factor for inductive motors, not electronic loads. Thus, it's probably (at most) just a capacitor in a box, sized for typical single phase motors. Here's some more info on power factor correction: http://www.lmphotonics.com/pwrfact.htm |
Subject:
Re: Power Factor Controller
From: kmclean-ga on 02 Sep 2005 11:13 PDT |
Most, if not all, Residential users are billed on real power. However for what its worth, higher current damand means higher copper losses(real) which the consumer is billed for. Also, most power companies will offer discounts for installing power factor correction devices. That being said, there is practally no possible way for the consumer to save 60% on their power bill. Unless you were the only consumer at the end of a long single phase tap, and as a condition of service the consumer was fractionally billed on all basis. (part of the bill was based on all factors, power, power factor, kwh, etc.) They probablly sold to one person with a strange contract for service and it resulted in 60% drop, for most residental users it would result in less than 5%. |
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