threephase

Three equations for satisfying symmetrical condition of voltage or current of threephase three-wire load in the form of rotating factor am and admittance or impedance are introduced.

本文应用旋转因子a~m及导纳或阻抗的形式给出了对称线电压下，满足三相三线负载电压或电流对称条件的三个方程。

It was analyzed why threephase load in unbalance can be taken place, the harmfulness resulted from distribution transformer with unbalanced threephase load was discussed emphatically and the importance of balanced threephase load was pointed out in this paper.

结合一起事故，分析了三相负荷不平衡产生的原因，着重论述了三相负荷不平衡对配电变压器产生的危害，指出了平衡三相负荷的重要性。

The threephase circuit is applied to production and life extensively, so the experiments of it are important and necessary, nevertheless the experiments are not only very dangerous, but also some of fault experiments are relatively hard to do.

在生产与生活中三相电路的应用最为广泛，针对三相电路运行工况的实验就显得重要而且必然，然而实际的三相电路实验不仅危险性较大，而且一些故障性试验较难进行。