零序电流继电器在核电厂M310机组低压交流系统中的应用

Application of Zero Sequence Current Relay in Low Voltage AC System of M310 Unit in Nuclear Power Plant

阐述核电厂M310机组380V低压交流系统中核岛低压交流配电盘采用的SPAJ 140C继电器、BOP低压交流配电盘采用的LEG-193C2S-DC的两段式漏电故障继电器、常规岛低压交流配电盘采用的LGL-110型零序过电流继电器这三种零序保护继电器原理,分析三种继电器在原理、功能上的不同点和共同点,提出核电厂M310机组380V低压交流系统的运行、维护和检修策略。

This paper describes the principles of SPAJ 140 C relay used in 380 V low-voltage AC system of M310 unit in nuclear power plant,LEG-193 c2 s-dc two-stage leakage fault relay used in BOP low-voltage AC distribution board,LGL-110 zero sequence over-current relay used in conventional island low-voltage AC distribution board The operation,maintenance and overhaul strategies of 380 V low voltage AC system of M310 unit in nuclear power plant are proposed.