摘要
对400 V电压互感器(PT)一次保险熔断的现象进行分析,确定单相高阻接地时,非故障相电压升高,PT饱和,励磁电流增加是保险熔断的原因。采用中性点加装流敏电阻的方案,解决了单相接地时PT一次保险熔断的问题。
The incident of 400 V PT primary fuse fusing was analyzed,and confirmed that the main cause is that the exciting current increase. To provide current-sensitive resistant on neutral point solved the problem of PT primary fuse fusing when single-phase grounded.
出处
《华电技术》
CAS
2016年第8期45-47,50,共4页
HUADIAN TECHNOLOGY
关键词
电压互感器
熔断
单相接地
过电压
抗饱和倍数
流敏电阻
voltage transformer
fusing
single-phase ground
overvoltage
anti-saturation index
current-sensitive resistant
