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Sensors 2012, 12(1), 1042-1051; doi:10.3390/s120101042

Electronic Voltage and Current Transformers Testing Device

Electric Power Research Institute of Guangdong Power Grid Corporation, No. 8 Shuijungang Dongfengdong Road, 510080 Guangzhou, China
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Received: 2 December 2011 / Revised: 7 January 2012 / Accepted: 10 January 2012 / Published: 18 January 2012
(This article belongs to the Section Physical Sensors)
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Abstract

A method for testing electronic instrument transformers is described, including electronic voltage and current transformers (EVTs, ECTs) with both analog and digital outputs. A testing device prototype is developed. It is based on digital signal processing of the signals that are measured at the secondary outputs of the tested transformer and the reference transformer when the same excitation signal is fed to their primaries. The test that estimates the performance of the prototype has been carried out at the National Centre for High Voltage Measurement and the prototype is approved for testing transformers with precision class up to 0.2 at the industrial frequency (50 Hz or 60 Hz). The device is suitable for on-site testing due to its high accuracy, simple structure and low-cost hardware. View Full-Text
Keywords: EVTs; ECTs; testing device; ratio error; phase error EVTs; ECTs; testing device; ratio error; phase error
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Pan, F.; Chen, R.; Xiao, Y.; Sun, W. Electronic Voltage and Current Transformers Testing Device. Sensors 2012, 12, 1042-1051.

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