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蛟河市有线电视网共有三条主干线,即:东干线、西干线和北干线。其中东、西两干线前6节放大器由机房供电器供电,而北干采取反供电。1999年春节晚上值班员发现北干线电缆接头哧火,于是通知维修人员立即断开北干线电缆,用万用表测电缆外皮带电125Ｖ,怀疑有220Ｖ电压接触钢绞线。维
Jiaohe cable television network has a total of three main lines, namely: the East Route, West Route and North Route. Among them, the first six sections of the east and west trunk lines are powered by the engine room power supply, while the north side adopts the reverse power supply. On the night of Spring Festival of 1999, the attendant found that the northern trunk cable connector was fiery, and immediately instructed the maintenance staff to immediately disconnect the north mainline cable. The multi-meter was used to measure the outer 125V of the cable and suspected to have 220V voltage contact with the strand. dimension