1. The heat-shrinkable sleeve has a fixed shrinkage ratio. At the same time, the degree of insulation and pressure resistance of the heat-shrinkable sleeve depends on the thickness of the shrunk sleeve. Therefore, the selection must follow the method specified in the product manual-different sizes of busbars use corresponding caliber sleeves.
2. The copper-aluminum busbar is prone to surface scratches and burrs in the process of production, storage, handling, and tin-lining. The heat-shrinkable sleeve mainly relies on huge internal stress to achieve the purpose of shrinkage when heating and shrinking, and the heat-shrinkable sleeve in the heating state is softer.At this time, if it is placed on a copper-aluminum busbar with sharp burrs on the surface, the heat shrinkable sleeve will be scratched, and the result is that the heat shrinkable sleeve will crack immediately or crack after a period of operation.Therefore, before shrinking, it is necessary to check the copper-aluminum busbar for burrs and treat it accordingly to smooth the surface of the copper-aluminum busbar.
3. Based on the mechanism mentioned in Item 2, before using a continuous heat shrinkable sleeve, when the sleeve is cut according to the specific required quantity, the incision must be smooth and no zigzag incisions can appear.