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September 12, 2025ElectronicsOpen Access

Research on Non-Contact Low-Voltage Transmission Line Voltage Measurement Method Based on Switched Capacitor Calibration

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This research demonstrates a self-calibration method for non-contact voltage measurement, highlighting enhanced shielding from interference.

The study finds that the proposed method achieves a maximum relative error of 1.06% in voltage amplitude measurement.
Tests show the method effectively performs under inter-phase electric field interference, with a maximum relative error of 1.34%.
The development includes a shielded coaxial probe design that significantly enhances the system’s anti-interference capability.
Results confirm strong adaptability of the sensor across various conductor diameters, with errors kept within 1.57%.

Yang et al. (2025) studied this question.

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This research demonstrates a self-calibration method for non-contact voltage measurement, highlighting enhanced shielding from interference.