Positive temperature coefficient (PTC) thermistor and triple frequency harmonic filter can reduce zero sequence voltage when a nonlinear resistance is used to prevent ferroresonance.
在非线性电阻消谐方式下，正温度系数(PTC)热敏电阻和三次谐波滤波器可以较好地解决零序电压偏高的问题。
It is pointed out that the 3-phase zero voltage switch used in the pure resistance circuits is a special case of the 3-phase SCR switches without transients.
指出三相零电压开关在纯阻性电路中应用，是它的一种特殊形式。
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