Low cost measurement equipment for the accurate calibration of voltage and current transducers

The increasing interest in the use in medium and high voltage networks as well as in the low voltage ones of non-conventional low power instrument measurement transformers entails the availability of dedicated calibration set-up, equipped with flexible and accurate measurement systems. The paper presents a measurement system for the calibration of both inductive and low power voltage and current transformers, which includes a low cost and digital acquisition and measurement equipment. It is based on a portable data acquisition system composed of various current and voltage data acquisition boards. The proposed system can be used for the calibration of transducers with analog output from DC up to tens of kilohertz and allows the comparison of signals of different kind and order of magnitude.