my power meter operating a 240vac fan shows a power factor of 0.56 and current of 0.414 amps. I added a capacitor to fix the power factor using an online calculator. The online calculator asks you to enter the real power in kw, the power factor and the desired power factor. An internet enquiry states that the unit of real power is watts and apparent power is VA.
The meter showed 58 watts or .058 in kw. I entered 0.9 as the desired power factor. The answer in KVAR units was 0.06. KVAR=2pfCufV^2x10^-9. p is pye, f is frequency C is capacitance in uf. Substituting to get the capacitance I got 3.3uf. I used a 3.2uf.
Using this capacitor I got a new power factor reading of 0.94 and current reading of 0.24 amps.
What I don't understand is the meter was still showing 58 watts even though the current was much less with the capacitor. Can this be explained? Nothing seems to be gained by using a capacitor.
The meter showed 58 watts or .058 in kw. I entered 0.9 as the desired power factor. The answer in KVAR units was 0.06. KVAR=2pfCufV^2x10^-9. p is pye, f is frequency C is capacitance in uf. Substituting to get the capacitance I got 3.3uf. I used a 3.2uf.
Using this capacitor I got a new power factor reading of 0.94 and current reading of 0.24 amps.
What I don't understand is the meter was still showing 58 watts even though the current was much less with the capacitor. Can this be explained? Nothing seems to be gained by using a capacitor.