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The expected service life of high voltage xlpe cable

Information Source:Henan Huadong Cable Co., Ltd Release date:2014-05-22

Waterproof tidal performance high voltage XLPE cable has been an important issue for electrical department concerned. The reliability of high voltage XLPE cable transmission system, the water tree growth depends to a large extent on the cable internal. While the water tree growth, in addition to the longitudinal waterproof cable, also directly with a cable radial water-resistant tidal characteristics.

High voltage cable radial water-resistant tidal component is mainly metal sleeve. At present domestic and foreign popular HV XLPE cable waterproof tidal metal sleeve are extrusion type, welding and aluminum-plastic composite with comprehensive protective layer type three kinds big, its structure, properties, manufacturing method, manufacturing equipment, the user's evaluation of different.

There are many ways can prevent moisture and moisture into the interior of the cable. Wherein, the metal sleeve can effectively prevent water or moisture into the cable and lead generation and growth of water trees, so that the cable insulation level degradation decreased, shorten the service life of the cable.

On the basis of foreign cable cable running time of expert experience and theory, XLPE cable under the different conditions of life expectancy. Of course, some of these data is the computer simulation data, but with some reference value.

Without any protection from water or moisture and effect of the 15-25

Use of expandable waterstop 20-30

The use of tree retardant crosslinked material 30-35

The use of tree retardant crosslinked material and water blocking tape 35-40

The use of metal sleeve tide layer about 60 years

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