浅议低压供电系统中零线截面的选取

低压供电系统中,无论是三相四线供电系统还是单相供电系统,都存在共用零线的情况,对于东胜供电分局范围内的旧小区电缆选型,零线截面远低于相线截面,共用零线造成承载电流过大,经常造成绝缘老化、烧断零线,形成供电故障。为减少共用零线过载造成电气故障,需要在低压供电设计中,对于零线截面的选取要充分考虑可能承载的负荷水平。

Low-vohage power supply system, whether it is the power supply system of three-phase four-wire or single-phase power supply system, there are a total of zero line, dongsheng power supply selection of old residential quarters within the branch cable, far below the zero line cross section lines section, a total of zero line caused by carrying too much electricity, often caused by aging, burn off zero line, forming power tailure. In order to reduce the zero line overload caused a total electrical failure, needed in the design of low-voltage power supply, for zero line cross section select the load levels to take into account possible.