Cleaning work for installing heat-shrinkable cable accessori
Cable accessories must be kept clean and insulated and sealed during installation. Adsorption of dust and other debris in the ambient air on the heat-shrinkable cable accessories will cause some problems affecting the effect and quality, especially for cross-linked cables. High-pressure heat-shrinkable cable accessories should pay special attention to cleaning. Here are some points to note about cleaning work for installing heat-shrinkable cable accessories:
First attention of cleaning work for installing heat-shrinkable cable accessories：Remove dust and other impurities from cable accessories
At present, the heating tools used when installing heat-shrinkable cable accessories are limited to liquefaction guns, gasoline torches, etc., but as long as they use fuel, there will be insufficient combustion. If the flame is not sufficiently burned, a large amount of carbon smoke will be generated. When using the spray gun to shrink the heat shrinkable cable accessories, these smoke will be sprayed on the surface of the heat shrinkable material. If it is not removed, it will cause poor insulation contact. And the sealing effect becomes poor, which will increase the leakage current and bring great safety risks. Therefore, it is required to clean each component with solvent before and after shrinking in each installation process step. This is a very important Important steps are also essential!
Second attention of cleaning work for installing heat-shrinkable cable accessories：Remove oil to ensure sealing effect
If the parts of the heat-shrinkable cable accessories are oily, the hot-melt adhesive on the inner wall will not be fully effective. Heat-shrinkable cable accessories are made by heating and melting the hot-melt adhesive, and then tightly bonding the cables and cable accessories and the components of the heat-shrinkable cable accessories to prevent the penetration of water and oil and ensure the waterproof and moisture-proof sealing effect.
Third attention of cleaning work for installing heat-shrinkable cable accessories：Selection of cleaning solvents
Generally, trichloroethylene or acetone is the best cleaning solvent. If ethanol is evaporated, the surface resistance will be zero, so it is not suitable; let alone ordinary gasoline, it is definitely not suitable. The quality of the cleaning solvent is directly related to the cleanliness of the heat shrinkable cable accessories, so the cleaning solvent must be selected to ensure the cleanliness of the cable accessories.