Integrated power-frequency voltage-withstand test device

Abstract

The invention relates to an integrated power-frequency voltage-withstand test device. The integrated power-frequency voltage-withstand test device comprises a voltage adjustor, a test transformer anda control system; the voltage adjustor is connected with an external power supply, and outputs adjustable base voltage signals; the test transformer is connected with the voltage adjustor, and outputs0-50 kV test voltage signals based on the base voltage signals; the control system is used for controlling the voltage adjustor and a power-frequency voltage-withstand test process; the voltage adjustor, the test transformer and the control system are integrated together, and arranged in a shell; a vacuum circuit breaker is connected with the test transformer; a voltage equalizing ring used for preventing corona discharge is installed on the top of the test transformer; the integrated power-frequency voltage-withstand test device further comprises a voltage measurement device, an over-currentprotection device and an over-voltage protection device; and the voltage measurement device is used for measuring the voltage of test voltage signal output by the test transformer. The integrated power-frequency voltage-withstand test device in the invention satisfies actual engineering requirements, can reduce the test complexity, avoid the wiring error, increase the test efficiency and reduce apotential safety hazard, and suitable for a power-frequency voltage-withstand test of the vacuum circuit breaker with the voltage level of 20 kV and below.

Description

technical field [0001] The invention belongs to the field of high-voltage test technology research, and in particular relates to an integrated power frequency withstand voltage test device suitable for power frequency withstand voltage tests of vacuum circuit breakers with a voltage level of 20kV and below. Background technique [0002] There are a large number of vacuum circuit breakers with a voltage level of 20kV and below in the power system. According to the regulations, before it is put into use, it needs to undergo a power frequency withstand voltage test. According to the relevant general management regulations and handover standards for substation testing, the maximum test voltage for vacuum circuit breakers of 20kV and below is 50kV. In engineering practice, split power frequency test devices are usually used. [0003] Combined with engineering practice, the current split-type power frequency test device mainly has the following problems: the required test device ...

AI Technical Summary

Problems solved by technology

[0003] Combined with engineering practice, the current split-type power frequency test device mainly has the following problems: the required test device and its accessories are numerous, and it is difficult to carry; the test wiring is complicated, which is easy to cause wiring errors and low wiring efficiency; The safety distance is not enough, there are potential safety hazards

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