2) zero sequence directional overcurrent
零序方向过流
1.
They ensure the normal operation of 220 kV under impedance and the zero sequence directional overcurrent protection in special operation mode,and improve safe operation and reliability of the substation.
保证了在特殊运行方式下主变220 kV低阻抗和零序方向过流保护功能正常投入,提高了变电所安全运行可靠性。
3) directional over-current protection
方向过流保护
1.
The principle and installation of differential protection and directional over-current protection which applied to ringlike type power network is presented.
介绍了环式电网应采用的“差动保护”和“方向过流保护”的原理及设置。
5) zero-sequence directional overcurrent relay
零序方向过流保护
6) directional overcurrent relay
方向过电流继电器
补充资料：方向
①指东、南、西、北等：在山里迷失了～。②正对的位置；前进的目标：军队朝渡口的～行进。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条