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Anti-interference direct current resistance testing device

A technology of DC resistance testing and standard resistance, which is applied in the direction of measuring devices, measuring resistance/reactance/impedance, components of electrical measuring instruments, etc., and can solve the problems of inability to complete line DC resistance testing, personal induction accidents, test data deviations, etc. problems, to achieve the effect of safe and convenient test wiring, strong field applicability, and strong practicability

Active Publication Date: 2013-03-20
FUSHUN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the present invention proposes an anti-interference DC resistance testing device, which uses harmonic analysis method to realize the measurement of DC resistance parameters of high-voltage lines, and solves the problem that the line DC resistance cannot be tested in the prior art. There are often severe deviations in test data, and even equipment damage and personal electric shock accidents

Method used

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Embodiment

[0023] Such as figure 1 As shown, the DC constant voltage and constant current source is connected to the impedance matching unit; the impedance matching unit and the data test calculation unit are respectively connected to the standard resistance and the measured resistance sampling unit, the relay test action unit and the interference voltage detection unit; the data test calculation unit is connected to a display unit; the display unit is connected to the keyboard and the overvoltage protection unit; the keyboard and the overvoltage protection unit are connected to the storage and printing unit.

[0024] Such as figure 2 As shown, the DC constant voltage and constant current source is that the EMI filter circuit is connected to the rectification filter circuit I, the rectification filter circuit I is connected to the isolation transformer and the PWM control circuit, the isolation transformer is connected to the rectification filter circuit II, and the rectification filter...

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Abstract

The invention relates to an anti-interference direct current resistance testing device, which adopts the structure that a direct current, constant voltage and constant current source is connected with an impedance matching unit; the impedance matching unit and a data testing and calculating unit are respectively connected with a standard resistance and measured resistance sampling unit, a relay test action unit and an interference voltage detecting unit; the data test calculating unit is connected with a display unit; the display unit is connected with a keyboard and an over-voltage protection unit; and the keyboard and the over-voltage protection unit are connected with a storage and printing unit. The device can meet the requirements of achieving smooth and accurate test of direct current resistance under the condition of a 350V relative interference voltage or a 100V interphase interference voltage.

Description

technical field [0001] The invention relates to a test device for electric power equipment, in particular to an anti-interference DC resistance test device, which is applied to test the DC resistance of electric power equipment. Background technique [0002] At present, with the development of electric power construction, the number of 66kV and above lines being erected on the same pole and crossing across them is increasing, resulting in a high induction voltage between transmission lines. The single phase-to-ground voltage can reach about 350V, and the phase-to-phase voltage can reach about 100V. [0003] The DC resistance measurement of the line is the basic data for checking the quality of the line crimping joints and the fault location of the line distance, and is also the main basis for evaluating the construction quality of the line. Bridges and digital DC resistance testers cannot complete the test of line DC resistance at all, and there are often serious deviations ...

Claims

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Application Information

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IPC IPC(8): G01R27/08G01R1/28
Inventor 刘国斌王清昊顾孟山李萍王翼李岩张宁李刚
Owner FUSHUN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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