同义词
1)positive-sequence current relay,正序电流继电器2)positive phase sequence relay,正序继电器3)positive voltage relay,正序电压继电器4)negative phase sequence current relay,负序电流继电器5)zero-phase sequence current relay, residual current relay, zero-sequence current relay,零序电流继电器6)positive phase-sequence relay,正相序继电器
