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What role the thermal contraction cable accessories play in the cable? We will analyze from the cable structure.
Commonly used power cable conductor, insulation, shielding, and sheath and so on four main structure layer, heat shrinkable cable accessories, as an integral part of the cable line in heat shrinkable cable terminal head, heat shrinkable cable intermediate joint, must make the four layer structure of the cable has continued, respectively, and can realize good conductor, insulation and reliable, good seal and adequate mechanical strength, to ensure the quality of cable terminals and cable connector, to ensure that the entire cable power supply reliability of distribution network.
At cable terminals and joints, due to the disconnection of cable metal sheath and shield layer, the distribution of electric field is much more complex than the cable body, and axial stress exists in cable terminal electric field. Therefore, it is necessary to use thermal shrinkage cable accessories to realize the continuous and connection of cables, that is, a connection device that can meet certain requirements of insulation and sealing.