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The calibration of the insulation oil tester (IOT) should simulate the actual operating state of device. It is recommended that the calibration apparatus have the same impedance with insulation oil vessel. This paper built models using finite element method and calculated capacitance values for different oil vessel structure. Besides, high-precision LCR electrical bridge was used to measure capacitances...
The performance of electronic transformer (ET) directly influences power measurement accuracy, of which output mode is quite different from that of electromagnetic transformers. Thus, conventional calibration method is not suitable for testing ET. This paper starts with the definition of ration error and phase error by IEC standard; analyzes problems in the existing calibration methods and then innovatively...
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