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The sealing difference of Cold and Heat shrinkable cable termination kit

2023-04-12
Since most cable termination are installed in outdoor overhead, directly buried and other environments, waterproof and moisture-proof gas has become one of the keys to ensure the safe operation of cable termination, and its sealing performance and sealing measures should also be considered.

At present, there are usually two sealing methods: one is the method of filling with asphalt or epoxy resin, which is complicated, difficult to control and not conducive to maintenance; Another new method is currently the global professional manufacturers preferred method, is the use of high sealing mastic, its simple process, reliable performance, easy maintenance and installation, these unique advantages also make it become the mainstream of use. Using this new method, the first is to consider the performance of sealing mastic. Because the quality and performance of the mastic directly affect the sealing performance of the termination, it is very important to choose a kind of mastic that can be used on the surface of the cable body and the surface of the accessory material, and at the same time can meet the needs of different temperature changes in the environment.


sealing mastic


Because the cold shrinkable cable accessories is actually the elastic cable attachment; That means using the elasticity of the liquid silicone rubber itself to pre-expand in the plant and put in plastic and support strips. To the site to the specified position, pull out the support strip to shrink naturally. This technology is the cold shrinkage technology, this attachment is the cold shrinkage cable attachment, so the cold shrinkable termination has good "elasticity", can avoid the cable termination expansion and cold contraction due to the atmospheric environment, cable operation load level. That is, the gap between the insulation generated by "cable breathing" causes the breakdown accident. The biggest disadvantage of the heat shrink attachment is that it does not have elasticity. Do not breathe with the cable. Therefore, it is the best choice to use all cold shrinkable accessories in the area where the temperature difference is large and the climate environment is greatly affected.

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Construction of Cable Accessories

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Expansion of heat shrink tube
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