Switch cabinet plum blossom touch finger pressure spring performance test device

Abstract

The invention relates to a switch cabinet plum blossom touch finger pressure spring performance test device, which comprises a temperature control box (1) and a test rod (2) arranged in the temperature control box. The test rod is cylindrical and is provided with a plurality of pressure sensors (3) on the side surface. The pressure sensors are in pair-wise symmetric arrangement along the axis of the test rod. The temperature control box is provided with a heating module, a temperature measurement control module and a heat dissipation module. The pressure sensors are connected with a recordingmodule; and when the test rod is inserted into a switch cabinet plum blossom touch finger (4), the recording module records pressure information of the pressure sensor. The beneficial effects are thatthe test device is simple in structure and ingenious in design; and by utilizing the pressure test technology, high-voltage switch cabinet plum blossom touch finger pressure is measured under different temperatures, and difference of pressure values between different switches can be obtained quickly and accurately, so that performance state of pressure springs can be tested, the springs, the performance of which declines can be replaced in time, and device safe operation can be improved.

Description

technical field [0001] The application relates to a performance testing device for a switchgear plum blossom contact finger compression spring, which belongs to the technical field of electric equipment inspection and maintenance. Background technique [0002] The switch cabinet is a kind of electrical equipment. The external line of the switch cabinet first enters the main control switch in the cabinet, and then enters the sub-control switch, and each branch is set according to its needs. The main function of switchgear is to switch, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system. The components in the switch cabinet are mainly composed of circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protection devices. According to the classification of voltage level, AC1000V and below are usually called low-voltage switchgear, AC1000V and...

AI Technical Summary

Problems solved by technology

The tension of the compression spring will decrease when the temperature rises or when it ages, resulting in a decrease in the pressure of the contact finger, a further increase in the contact resistance, a further increase in the temperature, and a worsening cycle, which will eventually lead to burnout of the contact

[0003] At present, the method of evaluating the contact of switchgear is to measure the pull-out force of the dynamic and static contacts. The pull-out force is affected by the interface friction coefficient and the contact finger pressure. The friction coefficient is affected by the service life, surface condition, and arc strike times. Certainty, thus affecting the judgment of finger pressure

At the same time, the pull-out force must be measured in three phases at the same time, and the difference between different phases cannot be distinguished

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