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Re: Power Factor and George Marsh


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Posted by George Marsh on August 14, 2012 at 15:56:17 from (50.104.223.0):

In Reply to: Re: Power Factor and George Marsh posted by George Marsh on August 14, 2012 at 15:21:17:

JohnT,

Here is an interesting read about power factoring fractional hp motors.


I come to know that we can reduce our electical bill if we add Capasitor at home."

This is a lie, do not believe it! Improving Power Factor only saves MONEY, not energy, and only if your utility assesses a penalty for having poor Power Factor. The vast majority of utilities only assess PF penalties to their larger industrial users, not residential users. it takes a special meter to even see poor PF, and that meter is more expensive than the tiny amount of revenue the utility can recover by installing and maintaining them on every residence. Even if you are assessed a penalty, improving PF on a load as tiny as 3.5kW will not likely be worth the cost of installing a capacitor.


But do not believe the lies about saving energy, it is just not true. CURRENT is reduced, but current is not energy, it is only a component of energy. When you tally all of the factors into how you are charged for energy, improving PF makes no difference to you, the user and bill payer.

George


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