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Strip-shaped insulation surface resistivity test double-protection type line electrode system

A technology for protecting electrodes and insulating surfaces. It is used in the measurement of resistance/reactance/impedance, measurement devices, and electrical variables. It can solve the problem of not being able to represent the insulation performance of the sample, and achieve the effect of improving representativeness and accuracy.

Pending Publication Date: 2021-11-30
HARBIN UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a double-protected wire electrode system for strip insulation surface resistivity testing. The problem that the linear current makes the actual flow area of ​​the current larger than the theoretical value affect the accuracy of the test results

Method used

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  • Strip-shaped insulation surface resistivity test double-protection type line electrode system
  • Strip-shaped insulation surface resistivity test double-protection type line electrode system
  • Strip-shaped insulation surface resistivity test double-protection type line electrode system

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Embodiment Construction

[0021] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0022] It should be noted that the insulating material sample in this paper is a flat rectangular parallelepiped strip structure.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] Such as Figure 1-Figure 3 As shown, a strip insulation surface resistivity test double-protected wire electrode system, including volume leakage current protection electrode 1, surface leakage current protection electrode 1, surface leakage current protection electrode 2, surface leakage current protection electrode 2 3, high-voltage electrode 4, and measuring electrode 5 , a high-voltage power supply 7 and a current measuring instrument 8, the volume leakage current protection electrode 1 is placed at the bottom, and the sample 6 is arranged parall...

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Abstract

The invention provides a strip-shaped insulation surface resistivity test double-protection type line electrode system which comprises a volume leakage current protection electrode, a first surface leakage current protection electrode, a second surface leakage current protection electrode, a high-voltage electrode, a measuring electrode, a high-voltage power source and a current measuring instrument, wherein the volume leakage current protection electrode is arranged at the bottom part; a sample is attached to the upper surface of the volume leakage current protection electrode; the two surface leakage current protection electrodes press and fix the sample; the high-voltage electrode and the measuring electrode are arranged on the upper surface of the sample, the high-voltage electrode and the measuring electrode are arranged in an area enclosed by the two surface leakage current protection electrodes, the high-voltage power supply is connected with the high-voltage electrode, the high-voltage electrode and the measuring electrode are connected with the sample, and the current measuring instrument is used for measuring current flowing through the sample; and the three protection electrodes are grounded and are respectively used for shielding surface leakage current and volume leakage current of the high-voltage electrode and the measuring electrode. The influence of non-linear current generated by the high-voltage electrode on the test is eliminated, and the accuracy of the surface resistivity test result is improved.

Description

technical field [0001] The invention belongs to the field of electrical insulation testing, in particular to a double-protection wire electrode system for testing the surface resistivity of strip insulation. Background technique [0002] With the rapid growth of the economy, the society's demand for electricity is also increasing, which also puts forward higher requirements for the stability of the power system operation. The cooperation of insulating materials is indispensable in the links of power generation, transmission and distribution. Whether the insulation properties of insulating materials meet the standards is related to whether the power equipment can operate normally, stably and safely. Therefore, it is necessary to test the insulation performance of insulating materials before they leave the factory, and the surface resistivity is one of the important indicators of insulation performance. In the national standard GB / T31838.3-2019, the wire electrode is proposed...

Claims

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Application Information

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IPC IPC(8): G01R27/02G01R1/04
CPCG01R27/02G01R1/04
Inventor 陈庆国宋春辉李万鹏程嵩池明赫
Owner HARBIN UNIV OF SCI & TECH
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