摘要
除一些外因(异物坠落,鼠、蛇害),变电站母线单相接地后,在故障点将流过持续时间虽短,但幅值较大的电流,其电弧或直接波及邻相、或使相间绝缘强度剧烈下降,由此造成相间短路事故。
Except some external reasons (such as foreign matter falling on,plague of rats and snakes) after single phase grounding on substation bus,the fault current passing through faulty spot has high amplitude but short in duration.The arc may disturb directly the nearby phase or cause insulation strength between phases severely dropped and result in inter-phase short circuited.
出处
《电力设备》
2001年第4期37-43,共7页
Electrical Equipment
关键词
绝缘配合
短路电流
电孤接地过电压
消弧线111t
insulation coordination
short circuit current
arcing ground over-voltage
arc suppression coil
