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13. Do not cut the heat shrink tube freely.
Thermal Shrinkage Power Cable Terminal Construction Requirements
The shrinkable power cable terminal attachment has the characteristics of small size, reliable performance, strong adaptability and easy installation. Suitable for indoor and outdoor terminals and intermediate connections of power cables.
1. The range of allowable ambient temperature for the heat-shrinkable power cable accessory is –40°C to +70°C.
2. The installation of heat-shrinkable power cable accessories must be completed once in a row to avoid moisture, and the heat-shrinking heads for cables up to 10KV should be made within four hours.
3. The cable terminal and intermediate connector must be kept dry and clean during the manufacturing process:
4. The hands of construction workers should be kept clean at all times.
5.Before making the cable head, it needs to be fully prepared with tools. The construction personnel should be familiar with the use of various tools and tools, inspections and precautions.
6. The lighting at the construction site is sufficient and the lighting fixtures must comply with safety regulations.
7. When there are nearby live equipment, safety measures should be taken.
8. The construction site shall comply with the safety fire prevention regulations. There shall be fire extinguishing equipment on site and the use of torches shall be of fire and explosion proof.
9. The heating tool recommends the use of a propane spray gun. The flame has a moderate yellow temperature, a large heating area, and a blue flame temperature when using gasoline. Care should be taken to keep the material away from the material, control the temperature, and avoid burning.
10. All heat-shrinkable tube parts are made of polymer materials through a special process. When the temperature reaches 110°C-120°C, the material begins to shrink, and the shrinkage rate is greater than 50%. The material will not be affected for a short period of time at 140°C, but overheating at high temperatures over a long period of time will damage or even burn the material, affecting the material properties.
11. When starting to shrink the tube, the flame should approach the material slowly, move around it to ensure uniform radial shrinkage, and then slowly extend. The flame is in the direction of shrinkage to preheat the tube, which is conducive to uniform shrinkage. Following the recommended initial shrinkage location and orientation in the installation procedure, shrinking from the bottom up helps to eliminate gas and enhance sealing.
12. In order to ensure the tight bonding and bonding strength between the heat shrinkable tube and the coating material, before being inserted into each layer of the tube, the coated portion and the adhesive sealing portion should be preheated and then cleaned with a cleaning agent. Remove the flame charcoal deposits and make good contact between layers.
14. Heat-shrinking attachments Contact parts of metal parts that are in contact with the seal (such as lead packs, terminals) should be carefully roughened and cleaned with a cleaning agent.
15. It is not allowed to construct in rain and fog weather. If the cable is found to be flooded or wet, remedial measures should be taken.
16. Do not damage the cable jacket and insulation during construction.
17. Heat shrinkable intermediate connectors are not allowed to move the thermal power cables when not fully cooled.