Power meter for determining parameters of muliphase power lines

A power meter for determining power parameters for power lines having periodic 3-phase voltage and current signals distributed to a plurality of power equipment, the 3-phase voltage and current signals having a fundamental frequency, the power lines having connected thereto at least one transducer generating analog signals representing the voltage and current signals, the power meter comprising:

• receiving circuitry, the receiving circuitry connectable to receive the analog signals from the at least one transducer and generate an output signal therefrom;
• an analog to digital converter operatively connected to receive the output signal from the receiving circuitry, sample said output signal at a sampling rate, and convert the voltage and current signals to digital data representing the analog signals;
• and
• a processor operatively connected to receive the digital data, the processor including logic means comprising:
• means for calculating the power parameters;
• and
• means for compensating for errors caused by not sampling synchronous to the fundamental frequency of the signals.