It is showed that magnetic rings of amorphous material on a conductor can notably increase its inductance and make effective suppression on the steepness of the vacuum restriking overvoltage.

试验显示,在导线上套上一串料磁环能够显著增加线路感,对减小真空开重燃过的陡度是有效的。

Multiple reignition makes the frequency and amplitude of overvoltage increase and might do harm to transformer coils by cumulative effects for its surge steepness.

多次重燃使得过率和幅值均升高，会对变器等绕组型设备绝缘造成危害。