Shrink cable head end is the use of elastomeric material (commonly used in silicone rubber and ethylene propylene rubber) injection vulcanization molding in the factory, and then the enlarged diameter, lined with plastic screw support member constituting the various cable accessories. When on-site installation, these sets of pre-expansion joints in the cable end or after treatment, out of a plastic spiral of internal support (support), pressing on the cable insulation cable accessories constituted. Because it is at room temperature by elastic recoil, rather than heat shrinkable cable accessories with fire heat shrink, so-called cold shrink cable accessories. Early Cold Shrink Cable Terminal just additional insulation shrink silicon rubber parts, electric field treatment still use stress or stress cone-type tape wrapping style. Now generally adopt a cold shrink stress control tube, the voltage level from 10kv to 35kv. Cold Shrink Cable Terminal, 1kv level uses cold shrink insulation tubes for enhanced insulation, 10kv level uses with inner and outer semi-conductive shielding layer of cold shrink insulation joints. Three-core cable terminal branches of the bifurcation using cold shrink sleeve. Shrink cable terminal head with a small, easy to operate, quick, no special tools applicable to a wide range of product specifications and less so on. Compared with heat shrinkable cable accessories, without the use of heat, and after the installation of the risk does not appear to move or bend between the inner layer of disengagement as accessories like heat shrinkable cable accessories (because shrinkage cable terminal head by elastic pressure clamping force). Compared with prefabricated cable accessories, though they are pressed against the elastic force to ensure that the internal interface features, but it is not as prefabricated cable accessories and cable section correspondence, specifications and more. It must be noted that, prior to the installation of cables, components, prefabricated cable accessories is no tension, and shrink cable terminal head is in a state of high tension, we must ensure that the storage period, the cold shrink type component should a significant permanent deformation or elastic stress relaxation can not be guaranteed after the cable is installed has enough elastic pressing force, and thus can not ensure good interface characteristics.