negative phase sequence relay 负序继电器 ; 负相序继电器 ; 负相序保护

negative sequence voltage relay [电] 负序电压继电器

negative sequence power direction relay 负序功率方向保护

negative sequence power directional relay 负序功率方向继电器

negative-phase sequence relay 反相序继电器

negative sequence current relay 负序电流继电器

negative sequence distance relay 负序距离继电器

negative-sequence direction relay 负序方向元件

negative-sequence reactance relay 负序电抗继电器