A switch loop resistance testing platform

Abstract

The invention belongs to the technical field of high-voltage switchgear testing, and specifically relates to a switch circuit resistance testing platform, which includes a platform support, a fixing rod vertically fixed to the platform support, a first-level telescopic rod, a second-level telescopic rod, a lower bracket, and an upper bracket , the first test piece and the second test piece; the first-level telescopic rod is movably connected to the fixed rod, and the second-level telescopic rod is movably connected to the first-level telescopic rod; the lower bracket is vertically fixed on the outer periphery of the first-level The outer circumference of the level telescopic rod; the first test piece and the second test piece are fixed on the front ends of the lower bracket and the upper bracket respectively, and the front ends of the first test piece and the second test piece are equipped with arc surfaces for plugging into the plum contact Inside, there are two connecting terminals at the rear end; the switch circuit resistance test platform provided by the present invention can avoid damage to the spring of the plum blossom contact by the test wire clamp, and is suitable for plum blossom contacts of different heights and sizes, and is easy to use and Reliable and high testing efficiency.

Description

technical field [0001] The invention relates to the technical field of high-voltage switchgear testing, in particular to a switching circuit resistance testing platform. Background technique [0002] According to the national industry standards and the maintenance regulations of China Southern Power Grid, the switches of the high-voltage switchgear need to undergo regular high-voltage tests, and the loop resistance (also called contact resistance) is one of the test items. At present, the loop resistance is mostly measured by the DC voltage drop method, that is, through the DC current of not less than 100A in the loop, by measuring the voltage difference between the upper and lower contacts of the tested switch of the high-voltage switchgear, the measured switch of the high-voltage switchgear is calculated. the loop resistance. [0003] When performing a high-voltage test on the switch of the high-voltage switchgear, it is necessary to connect the test wire to the plum blos...

AI Technical Summary

Problems solved by technology

During the loop resistance test, since the passing current is not less than 100A, if the test wire clip is directly clamped on the spring of the plum blossom contact, current will pass through the spring of the plum blossom contact during the test, and the spring will burn out in severe cases. Corrosion, which in turn affects the clamping force of the plum blossom contact, resulting in abnormal conditions such as the heat of the plum blossom contact in the normal operation of the switch under test; moreover, when the loop resistance is measured, the contact between the test line clamp and the plum blossom contact Resistance is also difficult to avoid, resulting in too large test data, which cannot truly reflect the circuit resistance of the switch under test

[0004] In addition, in the loop resistance test, the test of each tested switch resistance requires the cooperation of 4 test clamps; when testing multiple switches, it is necessary to repeatedly clamp and remove the test clamps, which is a huge workload and causes operational problems. work fatigue

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