Special shielding device for routine test of arrester

Abstract

The invention discloses a special shielding device for the routine test of a lightning arrester, which comprises a ring-shaped insulating plate, and the said ring-shaped insulating plates are two, namely a large ring plate and a small ring plate, and the diameters of the inner rings of the two are equal , the end faces of the large ring plate and the small ring plate are arranged parallel to each other and a supporting ring plate is arranged between them, and the large ring plate, the small ring plate and the supporting ring plate form an annular inner cavity, which can The insulator is clamped and fixed, and the inner ring surface of the large ring plate and the small ring plate is respectively provided with an insulating layer and a metal layer. The large ring plate, the small ring plate and the supporting ring plate are all split combined structures, respectively. Two split bodies are combined, and a guiding mechanism and a connecting mechanism are arranged between the two split bodies. The invention greatly improves the influence of external unfavorable factors on the data during the test, not only ensures the accuracy of the data, but also saves manpower, shortens the working time, greatly improves the working efficiency, and provides a guarantee for the safe operation of the power grid equipment .

Description

Technical field: [0001] The invention relates to a current shielding device for a lightning arrester, in particular to a special shielding device for a routine test of a lightning arrester. Background technique: [0002] Our test and laboratory team is responsible for the routine testing of 500kV and above equipment, and the design position of the grading ring of the 500kV surge arrester is special. During the test, because the pressurized position is close to the grading ring, the high voltage will discharge the grading ring. This leads to inaccurate test data and even unqualified conditions, which seriously affects the judgment of the data. Therefore, in order to obtain accurate data, it is necessary to break the lead and remove the pressure equalizing ring, so that the test work is extremely troublesome. Invention content: [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a special shieldin...

AI Technical Summary

Problems solved by technology

[0002]Our test and laboratory team is responsible for the routine test of equipment with 500kV and above, and the design position of the 500kV surge arrester voltage equalizing ring is special. The distance of the voltage equalizing ring is relatively close, and the high voltage will discharge the voltage equalizing ring, resulting in inaccurate test data, or even unqualified conditions, which seriously affects the judgment of the data

Therefore, if you want to get accurate data, you need to break the lead and remove the pressure equalizing ring, so that the test work is extremely troublesome

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