Double-segment zinc oxide lightning arrester insulation status testing method

Abstract

The invention relates to a method for testing double segments Zinc oxide arrester insulation state, which belongs to the field of power supply establishment test technology. According to the invention, the first grounded ammeter is connected in series with Zinc oxide arrester lower segment, the middle connecting part between the two segments is connected with direct current high voltage test instrument and the second ammeter, pressurizing from the middle connecting part of the two arrester, at first observating the first ammeter, adjusting for obtaining the leak current valve of the arrester; then adjusting the direct current high voltage test instrument, reading current valves of the first ammeter and the second ammeter, obtaining the leak current valve of the upper segment of the arrester from the difference of the two readings. The method of the invention can avoid removing high voltage down-lead, without ascent, reduce the labour intensity and working danger, at the same time avoid the bother of wire change in test, and improve working efficiency. In addition, because the middle segment wire of the double segments Zinc oxide arrester is lower than the top of the upper segment, it is safe and simple to test wire with a certain included angle.

Description

technical field [0001] The invention relates to a method for testing the insulation condition of an arrester, in particular to a method for testing the insulation condition of a double-section zinc oxide arrester, which belongs to the technical field of power supply facility testing. Background technique [0002] At present, it is widely used in the power grid system figure 1 , figure 2 The upper and lower placement of double-section zinc oxide arresters is shown. Testing the resistive current or AC reference voltage of zinc oxide arresters is the main means to judge the quality of zinc oxide arresters. However, due to the strict requirements on the speed of testing the AC reference voltage, the electric power department often uses the DC reference voltage instead of the AC reference voltage test in the maintenance. The electrical test regulations require that the insulation state of the zinc oxide arrester be reflected by testing the voltage at DC 1 mA and the leakage c...

AI Technical Summary

Problems solved by technology

In short, the labor intensity is high, the work efficiency is low, the high-altitude operation is dangerous, and the power outage time of the equipment is too long, which is not conducive to the stable operation of the power grid.

[0013] In addition, after comparing the test records of the same equipment for many years, the applicant found that under different external environments, the test data jumps a lot and is incomparable

That is, because the test instrument is affected by the environment, the accuracy of the obtained data is reduced

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