Wide Band Current Transformer with Sensitivity Depending on the Measuring Signal Frequency

摘要

In many electrical engineering applications it is necessary to measure some complex current signals containing high frequency periodic components (MHz) or short duration pulses (ns) superimposed on a low frequency carrier signal (usually power line frequency). For the overall measurement of such complex signals, wide band current transformers (WBCT) are currently used. The paper refers to the achievement of a wide band current transformer whose sensitivity changes automatically with the frequency of the measuring current, so as it does not reach saturation at low frequency large signals.