In the no-load test of transformer, because of the low power factor and non-sinusoid current waveform, the high precision measurement is difficult.

变压器的空载试验中，由于功率因数低，空载电流不是正弦信号，高精度测量其有功功率具有一定的难度。

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Its main transformer is made of imported cold rolled silicon steel, So its power loss is little with low no-load current.

该系列点焊机，主变压器均为进口冷轨硅钢片，因此，主变压器功耗小，各型空载电流小。

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