Tester

A tester and measurement module technology, applied in the field of testers, can solve the problems of reducing test efficiency, single function, troublesome instrument management, etc., and achieve the effect of improving test efficiency and overcoming single function

Inactive Publication Date: 2012-10-03
国网吉林省电力有限公司延边供电公司 +1
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Problems solved by technology

However, there are many types of instruments required for each test, which brings trouble to the management of the instruments, and the wiring is complicated and error-prone
[0004] To sum up, the shortcomings of the test instruments in

Method used

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Embodiment Construction

[0048] For the sake of reference and clarity, the technical terms, abbreviations or abbreviations used in the following are summarized and explained as follows:

[0049] PT volt-ampere characteristics: the excitation characteristics are usually called volt-ampere characteristics. The excitation characteristics of the voltage transformer are when the outlet terminal of the PT primary winding end is grounded and the other terminals are all open, the voltage U is applied to the secondary winding and the corresponding excitation current is measured The relationship between I, U and I is the excitation characteristic of the voltage transformer. The curve made with U as the abscissa and I as the ordinate is the excitation characteristic curve of the voltage transformer.

[0050] No-load test: Measure the no-load current and no-load loss of the transformer. It can find local or overall defects in the magnetic circuit; check whether the winding between turns and the layer insulation is go...

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Abstract

The invention discloses a tester. The tester comprises a power supply module, a first measuring module, a second measuring module and a master control module. The power supply module is used for providing a test power supply capable of adjusting voltage and frequency continuously. The first measuring module can obtain an output voltage and an output current of the power supply module in real time and performs predetermined volt-ampere characteristics treatment, no-load treatment or load treatment to the output voltage and the output current so as to realize the PT (Predetermined) volt-ampere characteristics, and single phase no-load and single phase load test of a transformer. The second measuring module is used for monitoring the high voltage side voltage of the transformer during an alternating current voltage withstand test of the transformer, and feeds the value to the master control module, so that the master control module adjusts the output of the power supply module according to the high voltage side voltage value and the predetermined withstand voltage value so as to perform the alternating current withstand voltage test of the transformer. Therefore, the tester provided by the invention integrates the test functions such as PT volt-ampere characteristics, single phase no-load and single phase load test of the transformer and alternating current voltage withstand test, thereby improving the test efficiency.

Description

Technical field [0001] The invention belongs to the technical field of electrical performance testing equipment, and particularly relates to a tester. Background technique [0002] When conducting high-voltage insulation tests for 10kv power distribution equipment, it often involves tests on the electrical performance of voltage transformers, distribution transformers, and power distribution cabinets. [0003] However, at present, the test instruments required for the test of voltage transformers and distribution transformers have problems such as single function and complicated measurement wiring. Especially at the test site, when multiple tests are conducted for multiple electrical performance indicators, such as testing PT (Phase Voltage Transformes, voltage transformer) volt-ampere characteristics and transformer single-phase no-load, single-phase load, and AC withstand voltage, it is necessary Wire the instruments required for each test separately. Each test requires a large...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/12
Inventor 李明霞王延春姜学明孙树义满永亮
Owner 国网吉林省电力有限公司延边供电公司
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