Insulating sleeve resistance testing method and device

By employing a three-electrode test configuration and adaptive control technology, the problem of current signal aliasing in traditional insulating bushing resistance testing has been solved, achieving high-precision and high-reliability volume resistance measurement.

CN120801822APending Publication Date: 2025-10-17SHENZHEN SUNBOW INSULATION MATERIALS MFG
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Patent Information

Application Number
CN202511126586.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-12
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

In traditional methods for testing the resistance of insulating bushings, the surface leakage current and volume current signals are mixed, resulting in low accuracy and poor reproducibility of the test results, making it difficult to accurately assess the insulation condition.

Method used

A three-electrode testing configuration was adopted, and a geometric coupling coefficient calibration database was established using finite element simulation technology. The physical separation of the surface leakage current and volume current paths was achieved through adaptive control equations and feedback adjustment algorithms, which dynamically optimized the shielding effect, eliminated the influence of environmental factors, and ensured the reliability of the measurement.

Benefits of technology

This significantly improves the accuracy and reproducibility of volume resistivity measurement of insulating bushings, ensuring the reliability and accuracy of the measurement results.

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Abstract

The invention relates to the technical field of resistance testing, and discloses an insulating sleeve resistance testing method and device. The method comprises the steps that three-electrode testing configuration is arranged on the outer surface of a sample insulating sleeve, finite element simulation is carried out through the electric field coupling relation between a shielding electrode and a testing electrode, and geometric coupling coefficient calibration data are obtained; performing shielding electrode potential control on the to-be-tested insulating sleeve provided with the three-electrode test configuration to obtain a self-adaptive control equation; a shielding electrode potential adjusting device is driven through a self-adaptive control equation, and meanwhile the optimal working potential of a shielding electrode when the current of a shielding loop is zero is monitored; under the condition of the optimal working potential of the shielding electrode, a rated test voltage is applied to the to-be-tested insulating sleeve, and a pure volume current value is measured; ohm law calculation is carried out based on the pure volume current value and the rated test voltage, a real volume resistance value is obtained, and the precision, reproducibility and reliability of insulation sleeve volume resistance measurement are improved.
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