客车电气连接器插销(俗称大头),其壳体是用铸铁铸造加工而成,由于绝缘不良,在插销插入插座时,壳缘触碰上正负端子,常发生同时烧损而报废。为此建议: (1)把插销的铁质壳体改成塑料壳体。塑料材质的硬度和韧性,完全可以替代铸铁材料,这样一旦接插有误(只要不是插反), Bus electrical connector bolt (commonly known as the bulk), the shell is made of cast iron casting, due to poor insulation, plug inserted into the socket, the shell edge touch on the positive and negative terminals, often occur at the same time burn and scrapped. To this end suggest: (1) the pin of the iron shell into a plastic shell. Plastic material hardness and toughness, can replace cast iron material, so once the wrong plug (as long as it is not inserted reverse)