Butt joint technique for 10KV oil-paper insulated cable and cross-linked polyethylene insulated cable

Abstract

The invention relates to a butt joint process for a 10 kV oil-impregnated paper insulated cable and a cross-linked polyethylene insulated cable. A stress distribution tube is utilized to realize the even distribution of the point electric field of butt joint cables, thereby eliminating the damage to the operation of the cables caused by the point electric field; a composite tube made of heat-shrinkable materials is utilized to realize the insulation restoration of a cross-linked cable and the even distribution of the electric field, and the composite tube is an integral tube compounded by a transistor, an insulating tube and the stress distribution tube, thereby eliminating the errors of overlapping sizes when the transistor, the insulating tube and the stress distribution tube are manually made and mounted, so as to ensure the success ratio of the production of cable heads; a metal connection conducting tube separates and seals the existing metal conducting tube with a flux tube in the middle thereof; and after the cables are butted with each other, and the oil of the oil-impregnated paper insulated cable cannot flow into the cross-linked cable by a metal wire core, so as to avoid the pollution of the oil of the oil-impregnated paper insulated cable to the cross-linked cable after butt joint. The invention has the advantages that after the oil-impregnated paper insulated cable is butted with the cross-linked cable by the process, the butt joint position is easy to leak the oil, the operation is stable, and the time is long.

Description

technical field [0001] The invention belongs to the technical field of power cables, and in particular relates to a butt joint process between a 10KV oil-immersed paper insulated cable and a cross-linked polyethylene insulated cable (cross-linked cable). Background technique [0002] With the continuous development of the power system, the power cables are also constantly updated. The 10KV power cables are from oil-impregnated paper insulated cables to non-drip oil-impregnated paper cables and then to XLPE cables, which makes the power industry and various enterprises use cables. It is possible to use cables of various insulating materials, such as: oil-impregnated paper insulated cables and cross-linked cables are used at the same time. Especially when renovating or expanding some old substations, it is possible that the originally used 10KV cables are oil-impregnated paper insulated cables, while the current 10KV cables are cross-linked cables. The original cables are shi...

AI Technical Summary

Problems solved by technology

[0005] However, the existing oil-impregnated paper insulated cables still have the following defects after they are docked with cross-linked cables: the oil-impregnated paper insulated cables at the joint are prone to oil leakage, which seriously pollutes the cross-linked cables and affects the operation of the cross-linked cables, resulting in short runtime, unstable

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