Induction meter only in a very narrow frequency near the frequency range and the voltage

Induction meter only in a very narrow frequency near the frequency range and the voltage and current for the fundamental conditions to ensure the best [for performance. In the case of a distortion of the waveform, the harmonic voltage and current  Voltage stabilizer  the turntable through  Circuit breaker  magnetic flux, causing fundamental changes in the magnetic flux distribution, thereby affecting the G-wave generator driving torque; Also, because the braking torque and flux distribution is almost irrelevant,  Electric energy meter  rotational speed changes, power metering errors. The harmonics of the power meter measurement error of j depends on how much content Mu are waves, harmonic current direction and other factors.