With the increase of solid insulation power cables in electric-network year after year, the accidents such as exploding of power cable and arrester caused by arc grounding overvoltage often happen.

• 随着矿区电网中固体绝缘电缆逐年增多,由弧光接地过电压引起的电缆放炮、避雷器爆炸事故不断发生,消弧及过电压保护装置的使用有效地防止了弧光接地过电压及其对固体绝缘设备的危害。