Device and method for testing industrial-frequency discharge of zinc oxide lightning arrester
A technology of testing device and testing method, which is applied in the direction of measuring devices, instruments, measuring electronics, etc., and can solve the problems of inconvenient power frequency discharge voltage testing and high cost of special instruments
Inactive Publication Date: 2011-06-15
CHINA THREE GORGES CORPORATION
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[0004] The purpose of the present invention is to provide a zinc oxide surge arrester working discharge test device and method, to solve the problems of inconvenient power frequency discharge voltage test of gap zinc oxide surge arrester and high cost of special instruments in the prior art
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[0015] A zinc oxide surge arrester working discharge test device and method, comprising a zinc oxide surge arrester MOA, the two ends of the zinc oxide surge arrester MOA are connected to the secondary side of a transformer ST, the two ends of the zinc oxide surge arrester MOA are connected in parallel with a voltmeter V, a primary side of the transformer ST, and an ammeter A and pressure regulating device U are connected in series.
[0016] Ammeter A, voltmeter V and voltage regulating device U are installed inside the operation box 1 .
[0017] The transformation ratio of the transformer ST is 50 / 0.2kV.
[0018] The working discharge test method of zinc oxide arrester includes the following steps:
[0019] 1) Start the voltage regulating device U, increase the voltage slowly and evenly, and the value of the ammeter A does not change much at the beginning;
[0020] 2) When the voltage rises to a certain value, the value of the ammeter A suddenly increases or changes rapidly...
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The invention relates to a device and method for testing industrial-frequency discharge of a zinc oxide lightning arrester. The device provided by the invention comprises the zinc oxide lightning arrester; the two ends of the zinc oxide lightning arrester are connected with a secondary side of a transformer; the two ends of the zinc oxide lightning arrester are also connected with a voltmeter in parallel; a primary side of the transformer is connected with an ammeter in series; and the ammeter and the voltmeter are arranged in an operation box. By utilizing the device and method for testing the industrial-frequency discharge of the zinc oxide lightning arrester, on the basis of the industrial-frequency discharge testing mechanism, the gas discharge time can be effectively judged only by observing the current digital change on the operation box, so that an industrial-frequency discharge voltage can be accurately measured. The measuring method is simple, convenient and effective, the test result has higher credibility, and special equipment does not need to be additionally arranged, so that the device and method provided by the invention are especially applicable to fields.
Description
technical field [0001] The invention relates to an electrical testing device and method, in particular to a working discharge testing device and method of a zinc oxide arrester. Background technique [0002] The power frequency discharge voltage is one of the important parameters reflecting the quality of zinc oxide arresters with gaps. In the industrial field, the conventional method of valve arrester test is usually used to measure the power frequency discharge voltage of zinc oxide arresters with gaps, which will lead to high measurement results. . The existing special tester for lightning arresters can easily and accurately measure the power frequency discharge voltage of zinc oxide lightning protection with gaps. equipped. [0003] In addition, there are oscilloscope method, radio method, test product low-voltage side series meter method and other measurement methods for power frequency discharge voltage test of gap zinc oxide arrester, all of which are relatively com...
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IPC IPC(8): G01R31/00
Inventor 付海涛
Owner CHINA THREE GORGES CORPORATION