摘要
针对目前电压互感器二次回路SPD产品存在的很多问题,论述了一种组合式过电压防护电路,可规避被雷击或操作过电压多次冲击后,SPD老化剩余电流增大的问题,同时在击穿失效后不会出现短路现象。
Aiming at many problems about the current SPD products for voltage transformer secondary circuit, a modular overvohage protection circuit is expounded. The circuit can avoid the SPD aging residual current problem after lightning or repeated impact of operating overvohage. And it will not appear short circuit phenomenon ＇after failure breakdown at tire same time.
出处
《现代建筑电气》
2014年第5期53-54,63,共3页
Modern Architecture Electric
关键词
组合式电压互感器
过电压防护
电涌保护器
剩余电流
短路
告警
modular voltage transformer
overvoltage protection
surge protective device （ SPD ）
residual current
short circuit
alarm
