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协庄煤矿在井下使用的是具有高低压配电装置的综合移动变电站,高压侧采用PBG-250/6000B型高压隔爆真空配电装置,低压侧采用BXBD-800/660(1140)型低压隔爆变电箱,该变电箱是作为低压侧总馈电开关使用的,分路开关为不同容量、不同型号的外接馈电开关。该种供电方式存在总馈电开关与分路馈电开关无法配套使用选择性检漏保护装置
In the underground coal mine, a comprehensive mobile substation with high and low voltage power distribution devices was used. PBG-250 / 6000B high-voltage explosion-proof vacuum power distribution equipment was adopted on the high-pressure side and BXBD-800/660 Explosion-proof electrical box, the substation is used as a low-voltage side of the total feed switch, shunt switch for different capacity, different types of external feed switch. This kind of power supply has the total feed switch and branch feed switch can not be used together with the selective leakage protection device