... 定向不定性 directional instability 定向过载电流 directional over current 方向性(材料),导向性(铁路) directional property ...
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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。
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