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What watt!

Techman
Techman Member Posts: 2,143
in A-C, Heat Pumps & Refrigeration
In a couple of threads watts has been refered to as volts x amps = watts ! I thought that was for DC voltage and for AC it is volts x amps x power factor = watts .

Comments

  • Eugene_Silberstein
    Eugene_Silberstein Member Posts: 349
    You are Correct!

    Yes indeed.



    The general, and correct, formula for power is voltage x current x power factor.



    In DC circuits that are used to power resistive loads, the PF = 1.

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  • RJ_4
    RJ_4 Member Posts: 484
    power factor

    My understanding is that  (power factor correction ) is not used in resistive loads, In a 3 phase suppl. heater circut we add the following      amps  = KW x 1000 divided by volts x 1.73.   On page 17 of the Ugly's book I believe they are talking about inductive, reactive loads.  (motors , transformers )   I always like to get several sets of eyes on all questions.

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