127 / 220kV recovery cable body connection - MMJ MMJ, i.e. & ldquo; Cable mold injection fusion joint & rdquo; The English abbreviation of Mount melt joint. MMJ is mainly for the intermediate connection of cross-linked polyethylene insulated power cables and submarine cables with voltage levels of 10kV, 35kV, 66kV, 110KV, 132kV, 220kV and 500kV and above. The cable body structure is completely restored at the cable joint by using MMJ technical means on site; The cable conductor and inner semi-conductive layer at the joint are completely restored and fabricated according to the original structure of the cable, so that the cable joint becomes a complete cable without joint. The insulating material and semi conducting material used to make MMJ are the same material as the insulating material and semi conducting material used to produce cables; The combination of MMJ and cable achieves good compatibility and stability in terms of chemical, physical properties and structure. The thermal and mechanical properties of the molten interface fully meet the requirements of GB / 2951.1-1997 and GB / T 11017.1-2002 after a large number of experiments and tests. MMJ has the same characteristics and design concept as high-voltage and ultra-high-voltage cross-linked cables. The significance of restoring the original cable body is to provide a cable connection technology with higher electrical stability, safety and reliability for the cable system.