I have been trying to understand how to calculate real power and power factor in an AC circuit when given only circuit voltage and real/true current as measured by a current transformer (CT).(adsbygoogle = window.adsbygoogle || []).push({});

What I (think I) know:

1. Real power P = I^2 * R (but I don't know the circuit resistance)

2. Real power = apparent power * power factor

3. Apparent power S = RMS source voltage * RMS current

I believe I can take (source voltage ) / √2 to get the RMS of the voltage then (measured amperage) / √2 to get the RMS of the amperage and can then calculate the apparent power as the product of those two values but I don't know how to get to real power and power factor from there.

Thanks for any direction you can give me!

Phil

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Calculating real power and power factor

Loading...

Similar Threads - Calculating real power | Date |
---|---|

Mathematics behind Signal and Systems | Wednesday at 4:14 PM |

Understand the Current Consumption of an IC in its Datasheet | Tuesday at 6:14 PM |

How to calculate voltage drop | Feb 28, 2018 |

Temperature rise calculation for electrical devices | Jan 30, 2018 |

RF Field Calculations... | Jan 6, 2018 |

**Physics Forums - The Fusion of Science and Community**