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煤矿井下127伏供电系统,由于工作环境恶劣,有关设施移动频繁,机械强度不高,所以发生故障的机会较多,甚至还可能造成恶性事故.对这方面的安全问题,近几年来已逐步引起人们的重视.电煤钻综合保护器的普遍使用就是一个有力的措施.但是,现在使用的综合保护器相当一部分还是ZB81-20/127型老产品,这种保护装置的灵敏度低,对线路断续短路所引起的电缆明火事故是难于起到保护作用的.1982年,我矿就曾发生过一起这样的典型事故,详情如下:
The 127-volt power supply system in coal mines has many opportunities for failure due to poor working environment and frequent movement of facilities, which may even cause serious accidents. The safety problems in this area have been gradually raised in recent years People pay attention to the universal use of coal-fired integrated protection device is a powerful measure.But now, a considerable part of the integrated protector is still ZB81-20 / 127 type of old products, this low sensitivity of the protection of the line off Continued short-circuit caused by the fire in the cable is difficult to play a protective role in 1982, I mine have had such a typical accident, as follows: