Docking method of 10kV crosslinked polyethylene cable

Abstract

The invention relates to a docking method of a 10 kV crosslinked polyethylene cable. The docking method comprises the specific steps of firstly aligning two sections of cables which need to be in butt joint, stripping cable outer protective sleeves, steel armor layers and inner protective layers in sequence from all ports, and taking down cable filling materials; sleeving one end of the cable with a radioactive heat shrink tube for use after cable butt joint manufacturing is completed; then stripping copper shielding layers and semi-conductive layers in sequence from all the ports; measuring the length of a copper pressed connecting tube which is connected with the cable cores, adopting 1 / 2 of the length of the cable core and adding 5 mm on the length, which is a basis that main insulation parts of the cables which needs to be stripped are exposed out of the conductive cores, according to the length, stripping cable main insulation layers from the ports, cutting the main insulation fractures into pencil tip shapes with the length of 60 mm, and making an inner semi-conductive layers with the length of 5mm exposed; connecting the conductive cores; finally using the sleeved outer protective sleeve radioactive heat shrinkage tube to conduct uniform covering and heat shrinkage on the outer protective sleeve at the middle joint. Compared with a traditional method, the docking method of the 10 kV crosslinked polyethylene cable has superior moisture resistance, waterproofness and insulating properties.

Description

technical field [0001] The invention belongs to the field of electromechanical technology, in particular to a method for connecting 10kV XLPE cables. Background technique [0002] In the electric power industry, when cables are connected, high-voltage insulating tubes are usually used for heat-shrinking or cold-shrinking lap joint treatment. Dendritic discharges are formed on the insulating surface, which can easily cause insulation breakdown and short-circuit between phases of the cable and short-circuit to ground; at the same time, the lap joint between the insulation tube and the cable is not sealed tightly after aging, and moisture in the air or surrounding water invades the cable, causing insulation breakdown between the cables. Short-circuit and ground-to-ground faults; and the insulation performance of the joints treated with insulating tubes is not high, which is likely to cause safety hazards. Contents of the invention [0003] The purpose of the present inventio...

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Problems solved by technology

[0002] In the electric power industry, when cables are connected, high-voltage insulating tubes are usually used for heat-shrinking or cold-shrinking lap joint treatment. Dendritic discharges are formed on the insulating surface, which can easily cause insulation breakdown and short-circuit between phases of the cable and short-circuit to ground; at the same time, the lap joint between the insulation tube and the cable is not sealed tightly after aging, and moisture in the air or surrounding water invades the cable, causing insulation breakdown between the cables. Short-circuit and ground-to-ground faults; and the insulation performance of the joints treated with insulating tubes is not high, which is likely to cause safety hazards

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