就我公司曾发生的，电流互感器极性接反；
In this paper, I had occurred, then the anti-polarity current transformer;
注意，如果电流极性接反，会使伺服驱动器不能工作。
Attention, if current polarity inverse connected, will lead to servo drive out of service.
当输出线接反后充电器不会工作，直到使用者接正确后方可启动。
When output wires are reversely connected to the battery the charger will not operate and will work normally when DC wires are correctly connected.
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