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I put a clamp across the three indivudual phases to a 400V distribution panel and get 4Amps per phase what is the total kW load the panel is drawing?
The total KVA is: KVA = (amps * volts * 1.73) / 1000 for a balanced load (which you have). So: (4 * 400 * 1.73) / 1000 =2.77KVA Note that you can only calculate KVA with the info you have provided. To calculate true KW, you have to know the power factor of the load. If you can determine the power factor, multiply the answer by PF to get KW. For the above to work, the PF has to be a decimal value (like 0.85 or 0.63, etc). If the listed PF is a percentage, like 85%, convert it to decimal (85% becomes 0.85, etc.). Oh, and panels don't draw current, they supply it. Loads draw current.
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