The validity check of zero-sequence operating direction for transformer directional over-current protection is also essential.
另外还需要进行变压器零序方向过电流保护动作方向正确性的检查。
Protection for these isolated systems has been a relatively simple task, which is carried out using over current directional relays with selectivity.
采用具有选择性的过电流方向继电器，对这种相互分隔直流系统的保护相对就简单。
A directional protection based on traveling wave current polarity comparison which is implemented by detecting the polarity of current wavefront of traveling wave is presented.
文章提出了基于检测行波电流波头极性的行波电流极性比较式方向保护。
A directional protection based on traveling wave current polarity comparison which is implemented by detecting the polarity of current wavefront of traveling wave is presented.
文章提出了基于检测行波电流波头极性的行波电流极性比较式方向保护。
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