Cold shrinkable cable lug, cold shrinkable termination assembly and method of terminating cables

Abstract

A cold shrinkable terminal assembly for terminating cables, comprising: a cold shrinkable terminal including a terminal body configured to be fixed to the cable joint; and a support tube, the terminal body is pre-expanded to a preset On the support tube of the composite gap filler, the composite gap filler covers at least the cutout of the exposed conductive shielding layer when the cold shrink terminal is fixed to the cable joint. The composite gap filling glue includes: a filling layer, which is in contact with the outer wall of the support tube; and an isolation layer, located between the filling layer and the terminal body, and the isolation layer is made of a material different from that used to make the terminal body. The invention also provides a cold-shrinkable cable terminal and a method for terminating cables. Since the isolation layer of the composite gap filling rubber is made of a material different from that of the terminal body, it can avoid direct contact between the filling layer and the terminal body made of silicone rubber material, effectively preventing the swelling of the filling layer on the terminal body and causing terminal failure. The reduction of physical properties of the body eliminates the risk of cracking of the terminal body.

Description

technical field [0001] The present invention relates to a cold-shrinkable terminal assembly, in particular to a cold-shrinkable terminal installed on a terminated cable, a cold-shrinkable terminal assembly for terminating a cable, and a method for terminating a cable. Background technique [0002] Cable accessories including cold-shrinkable terminals and intermediate joints are important components in power transmission and transformation cable lines. Cold-shrinkable terminals are generally used in cables and electrical equipment such as generators, motors, transformers, and gas-insulated switches (GIS). The connection, while the intermediate connector is generally used at the connection of two cables. The function of the cold-shrinkable terminal is to disperse the electric field at the cut-off point of the outer shielding of the cable, protect the cable from being broken down, and prevent moisture and conductive media from intruding into the insulating sleeve under operatin...

AI Technical Summary

Problems solved by technology

[0005] At present, the rubber body of the cold-shrinkable terminal commonly used in the market is made of silicone rubber material. If the gap filling glue of the silicone rubber base material is used as the control cement, in the case of a large expansion ratio, the two materials of the same base material will interact with each other. impact, resulting in a decrease in the physical properties of the rubber body, and may also cause the rubber body of the vulcanized silicone rubber to be prone to cracking

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