The switch oversteptrip incidents of two substations are described and the causes of its misoperation are analyzed. One is the mismatching of line overcurrent time(1 s) and switch instant trip time(0.7 s).
英
美
- 說(shuō)明了2座變電站開(kāi)關(guān)越級跳閘的事故情況；分析了西門(mén)子7SJ600裝置在天津電網(wǎng)運行中2次拒動(dòng)的原因:1次是線(xiàn)路的過(guò)電流時(shí)間(1s)與開(kāi)關(guān)速斷保護時(shí)間(0.；7s)不配合；造成相應開(kāi)關(guān)跳閘;
