When vacuum switches switch off shunt capacitors and HV motors, restriking overvoltage and multi-reburning overvoltage may be brought about and threaten insulation of equipments severely.

• 真空开关在开断并联电容器组和高压电动机时可能产生重击穿过电压和多次重燃过电压，对设备绝缘造成严重威胁。