Insulation test tool for gas-insulated metal-enclosed switchgear (GIS)

Abstract

The invention relates to an insulation test tool for gas-insulated metal-enclosed switchgear (GIS) in the technical field of high-voltage switches. The insulation test tool comprises a power frequency test transformer, a thunder impulse generator, an impulse voltage leading-in sleeve, a voltage division coupler, a partial discharge calibration terminal, a three-phase transfer switch and four three-station isolating switches. In the insulation test tool, a thunder impulse test device is combined with a power frequency tolerance voltage test, two tests can be performed under the conditions of not changing the interval connection modes by switching the three-station isolating switches, and the test efficiency is improved. One set of intervals of 145kv and one set of intervals of 252kv can bejointed simultaneously by using two voltage classes of three-phase transfer. The insulation test tool structure for the GIS greatly improves the utilization rate of test equipment, and a thunder impulse test, a power frequency tolerance test and a partial discharging amount measurement test can be finished one time after interval joint; and the interval joint is more convenient.

Description

technical field [0001] The invention relates to a device in the technical field of high-voltage switches, in particular to an insulation test tool for gas-insulated metal-enclosed switchgear. Background technique [0002] GIS must maintain a high degree of reliability in long-term use. For this reason, various tests must be carried out on the equipment according to the design specifications. In the manufacturing plant, there are: tests on the raw materials used, intermediate tests in the manufacturing process, product finalization and factory tests, etc. Through the test, mastering the condition of the GIS insulation can guarantee the product quality or find its defects early, so as to carry out corresponding maintenance and repair to ensure the normal operation of the equipment. [0003] Insulation tests can be divided into two categories: insulation characteristic test and insulation withstand voltage test; the first type of insulation characteristic test refers to measur...

AI Technical Summary

Problems solved by technology

Most of the electrical test equipment at this stage has the following disadvantages: general equipment can only independently test GIS equipment of different voltage levels, the test equipment is not universal, and the test efficiency is not high

It is difficult to install the lightning impulse test

It is inconvenient to connect the test equipment with the GIS interval

[0005] After searching the existing technology, it is found that, for example, the insulation equipment introduced in the article titled "SF6 Insulation Test Transformer System Produced by MWB of Federal Germany" published in the first issue of high-voltage electrical appliances in 1990 can only realize the protection of one voltage level. GIS equipment for partial discharge measurement, and to achieve power frequency withstand voltage test and lightning impact test, it is necessary to introduce more other equipment

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