装置采用了一种新的输出电流极性检测器，方法简便可靠。
The device is equipped with a new type of output current polarity detector, the method is simple and reliable.
选择模式匹配的方法对电路板上的元器件进行检测，实现元件丢失和极性检测。
Pattern matching is selected for the inspection of the components on PCB to detect the lost and polarity fault of components.
对于零序差动保护的CT极性检测和校对问题，文中提出了两种自适应参考方案以供探讨。
And two draft resolutions were proposed trying to solve the problem of ct polarity checking in transformer zero-sequence differential protection.
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