去年6月的一天,我车间加热区配电房内的直流电机控制柜突然失灵,配电房内外的照明灯全部熄灭,但受控于该配电房的动力电机却运转正常。 值班电工当即进入室内检查。首先习惯地用试电笔验直流柜进线,发现火线无电;顺着线路一直查到室内总空气开关的上端,验得一相无电;于是出房追 One day last June, the DC motor control cabinet in the power distribution room in the heating zone of my workshop suddenly failed, and all the lights inside and outside the power distribution room went out, but the power motor controlled by the power distribution room was operating normally. On duty electrician immediately entered the room inspection. First of all, accustomed to test the DC power cabinet with the test line into the line and found that FireWire no electricity; along the line has been found to the indoor air switch the upper end of the test, one phase without electricity;