Current transducer behaviour in a noisy environment

This paper deals with the behavioural analysis in a noisy environment of high precision current transformers, in which the performance is considerably improved by electronic compensation of the flux in the magnetic core. To this end, an Electronically Compensated Current Transformer (ECCT) model has been developed and its behaviour evaluated both in normal operation and under the effects of several noise sources. The model's validity and its application range are investigated through several simulation and experimental tests. The analysis highlights the noise sources most affecting ECCT performance, the design solutions for improving ECCT immunity, and some suggestions regarding standard tests to perform on this kind of device for estimating their disturbance rejection.

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