Apparatus for testing ageing resistance and water tree resistance performances of medium voltage cable

Abstract

The invention discloses an apparatus for testing ageing resistance and water tree resistance performances of a medium voltage cable, comprising a medium frequency generator set, a controlling cabinet, a test frequency console, a constant temperature console, a power supply controlling cabinet, a three-phase AC transformer, a voltage-dividing capacitor, a reactor and a constant temperature water bath, wherein the medium frequency generator set is orderly connected with the controlling cabinet and the test frequency console; the commercial power is orderly connected to the test frequency console via the power supply controlling cabinet and the three-phase AC transformer; the test frequency console orderly connects the voltage-dividing capacitor and the reactor to a test cable joint in the constant temperature water bath; a temperature controlling apparatus in the constant temperature water bath is connected with the constant temperature console; and the constant temperature console is connected with a computer data collecting system. The apparatus provided by the invention successfully solves the ageing test problem of the medium voltage cable; the test data is accurate; the simple structure is simple and the cost is low; the invention provides an available and reliable test apparatus for testing ageing resistance and water tree resistance performances of the medium voltage cable.

Description

technical field [0001] The invention relates to a cable test device, in particular to a device for testing the aging resistance and water tree resistance performance of medium-voltage cables. Background technique [0002] With the rapid development of the cable industry, my country's cables are gradually moving from meeting their own needs to targeting overseas markets. Due to the differences in cable performance requirements and test conditions in various countries, it is difficult for my country to manufacture cables that meet different national standards and succeed. Landing in overseas markets brings new challenges, [0003] According to the requirements of the South African product standard SANS1339:2003, product manufacturers should prove the long-term reliability and water tree resistance of the materials used in the cores of the medium-voltage cables (three-layer co-extruded XLPE insulated cables) they produce. For this purpose the standard provides power frequency (...

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Problems solved by technology

The applicant consulted a well-known domestic testing station, and the result is that there is no such testing equipment in China at present, and the testing cannot be carried out.

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