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A Fully Automated Measuring Station for the Calibration of Voltage Transducers

Power quality analyses in the last years has assumed more and more heaviness in industrial environments, due to the presence of non-linear loads: they require suitable and precise measuring instrumentation. Nevertheless, while there are lots of power quality standards fixing high frequency limits for harmonic analyses, there is a lack of standards concerning transducers calibration at amplitude and frequency different from the rated ones. Therefore in this paper a fully automated measuring station for the calibration of voltage transducers in wide amplitude and frequency ranges is discussed. As an application, the results of the calibration of a commercial transducer are presented: they are used to implement a time-domain procedure for real-time correction of the frequency response of the calibrated transducer.