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Performance evaluation of cold shrinkable termination kit and straight through joint

2023-03-03
Cold shrinkable cable accessories do not need to use open flame when installing, only need to gently extract the support strip, save time and effort in construction and save space, especially suitable for the construction of small space. The silicone rubber used in the cold shrinkage cable accessories has excellent high recovery elasticity and insulation, because the heat generated by electricity and temperature will make the cable have different degrees of contraction at different times. The elasticity of the silicone rubber itself can make the cold shrinkage cable terminal produce the same breathing effect according to the thermal expansion and cold contraction of the cable, with high quality sealing and waterproof effect.

Generally, the cold shrinkable outdoor termination kit refers to the outdoor cable connector, and the indoor terminal refers to the connection between the cable and the electrical equipment; The intermediate connection is divided into straight-through type and transition type. Two cables with the same insulation structure type are connected to each other as straight-through type, and two cables with different edge structure type are connected as transition type. 

Because it is at room temperature by elastic retraction force, rather than like heat shrinkable cable accessories to use fire heating shrinkage, so it is commonly known as cold shrinkable cable accessories. Due to the very convenient construction characteristics and excellent electrical performance, it has become a very popular cable accessories

1. Mechanical properties: the cold shrinkable termination kit should have sufficient bending resistance and shock-proof ability. The intermediate joint should also be able to withstand a certain amount of tension and measures to prevent external damage.

2. Electrical performance: Electrical performance is the first principle to judge the quality of cold shrinkable cable accessories. It is mainly to consider whether the electric field distribution of cable accessories is reasonable, whether the measures to improve the electric field distribution are appropriate, the electrical strength of materials, dielectric loss and insulation of products, etc., the key is the material level of stress cone, design level, production level.

3. Process performance: Process performance is an important condition for the design and selection of cold shrinkable cable accessories. The installation process should be as simple as possible to facilitate the on-site installation and construction, and the installation period is short; The requirements on the technical level of the on-site installation personnel and the environment are not high.

4. Manufacturer's quality assurance system: the manufacturer's quality inspection system, such as incoming material inspection, item by item inspection in process steps, finished product sample sampling. Of course, it is also very important to finalize the form of the product test, which is best to have a third party comprehensive inspection to complete.

cold shrinkable termination kit

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Dry-packed termination kit and heat shrinkable termination kit
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