Method and device for determining current value using a current transformer which operates in the saturation region

摘要

The peak value of half-cycle of secondary current flowing in current transformer (1) operating in core saturation region is detected and stored in a capacitor (15). A comparator (14) supplies switching signal to a signal processor (11). When the peak value exceeds, the processor receives the peak value and transmits a reset pulse to a switch (16) to discharge capacitor and to allow detection of subsequent peak value. An Independent claim is also included for current value determining device.