A Method for Measurement Traceability of Calibrator for Electronic Instrument Transformer Tester

Abstract:

The bottleneck of the measurement traceability system of electronic instrument transformer is the calibrator, which is based on the digital micro-differential source principle and plays the role as intermediate between digital values in data frames and the analog output of the existing standard current transformer (CT) or voltage transformer (VT). A kind of working mechanism of the calibrator for electronic instrument transformer tester and related calibration method are proposed in this paper. The ratio accuracy can be calibrated by the high-precision multimeter and the phase accuracy can be calibrated by the high-speed oscilloscope, which records the waveforms of analog output and the synchronization signal, and the time offset between them can be traced to the time standard. A calibrator is designed and manufactured according to the mechanism and related experiments are conducted to verify the feasibility of the calibration method.

• Periodical: Applied Mechanics and Materials (Volume 615)
• Pages: 201-207
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.615.201
• Online since: August 2014
• Authors: Ming Lei*, Yue Guo, Xin Zheng
• Keywords: Electronic Instrument Transformer, Oscilloscope, Phase Error, Time Offset, Zero Cross

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