Application of effective value voltage in power quality analyzer
The nominal power supply voltage is measured as an effective value (root mean square value), which is equivalent to the effective heating value. The reason why devices use effective values ​​instead of peaks to indicate ratings is because their main limitation is related to heat dissipation. The rms voltage may be too high or too low, but usually the low voltage causes the problem. A lower RMS voltage flattenable waveform (low peak) is a fatal combination that causes problems with sensitive loads. The voltage drop is related to the circuit load and the power supply impedance, which actually means the length and diameter (wire diameter) of the cable. NEC (210-19.a, FPN No. 4) recommends that the voltage drop limit from the branch circuit breaker to the furthest outlet is 3%, and the total voltage drop should be less than 5% (including feeder branch circuit). Harmonic Analyzer Harmonic Tester
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