Cold shrinkage type terminal, cold shrinkage type terminal module and manufacturing method therefor

Abstract

The invention discloses a cold shrinkage type terminal used for a power cable. The cold shrinkage type terminal comprises an insulating body and stress control clay; when the cold shrinkage type terminal is mounted on the power cable, the gap between the insulating body and the power cable is filled with the stress control clay to prevent from partial concentrated discharge at the end part of the power cable; and the dielectric constant of the stress control clay is within 5-100. According to the cold shrinkage type terminal, only one layer of the stress control clay with high dielectric constant is adopted for optimizing the electric field distribution of the cable along the insulating surface, so that a stress control tube or a stress control cone in the prior art is avoided; therefore, the structure of the cold shrinkage type terminal is simplified, and the manufacturing cost of the cold shrinkage type terminal is reduced; in addition, when the cold shrinkage type terminal is mounted on the power cable, silicone oil or silicone grease is not required; and therefore, the cold shrinkage type terminal provided by the invention can meet the related technical specifications of every country, and the application markets of the cold shrinkage type terminal is expanded. The cold shrinkage type terminal can be applied to power cables at the voltage of being equal to or less than 26/35kV.

Description

technical field [0001] The present invention relates to a cold shrink terminal for power cables, a cold shrink terminal assembly including the cold shrink terminal, and a method for manufacturing the cold shrink terminal assembly. Background technique [0002] For medium and low voltage power cables, for example, transmission of 26 / 35kV (U 0 / U) power cable 200 below the voltage, see image 3 , which generally includes a conductor core 201, an insulating layer 202 wrapped on the conductor core 201, a semi-conductive shielding layer 203 wrapped on the insulating layer 202, a metal shielding layer 204 wrapped on the semi-conductive shielding layer 203 and a metal shielding layer wrapped on the Outer protective layer 205 on layer 204 . [0003] In the prior art, cold-shrinkable terminal products for medium and low voltage power cables can be divided into two types. [0004] The first type of cold-shrinkable terminal product includes an insulating body and a layer of stress-co...

AI Technical Summary

Problems solved by technology

[0005] The second type of cold shrink termination product consists of the commonly used geometrical stress control cone, which requires the use of silicone oil or grease when installing the cold shrink termination on the prepared (stripped) end of the power cable As a filler to fill the gap between the insulating body of the cold-shrinkable terminal and the power cable, in the US market, it is not acceptable to use silicone oil or silicone grease as a filler

[0006] For the aforementioned first type of cold-shrinkable terminal product, because it needs to use double-layer stress control materials, its cost is high and its structure is complicated

[0007] For the aforementioned second type of cold-shrinkable terminal product, because it requires the use of stress control cones and silicone oil or silicone grease as fillers, it also has the defects of high cost and complicated structure. Moreover, this type of cold-shrinkable Type terminal products cannot meet the relevant technical specifications of some countries, which limits its application market

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