低压剩余电流动作保护器的设计分析

Design and analysis of low-voltage residual current operated protective device

针对目前剩余电流动作保护器发生单相漏电后易造成更为严重的相间短路故障的问题,在低压三相剩余电流动作保护理论的基础上,分析了一种新型低压剩余电流动作保护器的运行特性,探讨了不同线制下低压供电系统保护器设计的一般原则。遵循该原则可以将谐振参数控制在一个有限的范围内,避免了设计的盲目性。

In view of problem that current residual current operated protective device could easily lead to serious interphase short circuit fault after single-phase leakage, the paper analyzed operating characteristics of a novel residual current operated protective device in low-voltage grid based on lowvoltage three-phase residual current protection theory, and discussed general design principles of protector in low-voltage power supply system under different wiring systems. Following the design principles can control resonance parameters within a limited range, which avoids design blindness.