矿用电缆是煤矿机械设备的重要电控配件,其工作环境恶劣,特别是矿用拖曳电缆经常承受挤压、剪切。矿用电缆一般都采用高弹性材料做电缆外皮保护,这样就不可避免地会被煤石、矿车所挤破、压坏,而引起漏电及断线等故障,甚至会造成火灾。因此,加强对矿用电缆的自动保护技术的研究是十分重要的。一、矿用电缆的屏蔽结构与漏电自动保护矿用屏蔽电缆的屏蔽结构一般是三根相线绝缘层外有一层低电阻率的半导电橡皮,地线用半导电橡皮挤包。当绝缘层受到破坏 Mine cable is an important electrical control of coal mining machinery and equipment parts, its poor working environment, especially mine tow cable often withstand extrusion, shear. Mine cables are generally made of highly elastic materials for cable sheath protection, so that will inevitably be crushed coal and mineral car, crushing, causing leakage and disconnection and other failures, and even cause a fire. Therefore, it is very important to strengthen the research on automatic protection technology of mine cable. First, the mine cable shielding structure and automatic leakage protection Mine shielded cable shielding structure is generally three phase insulation layer has a layer of low resistivity semi-conductive rubber, rubber semi-conductive ground extruded. When the insulation is damaged