IMPULSE CURRENT DETECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an impulse current detection device such that an impulse current can be observed with high precision using a Rogowskii coil without using an external integration circuit having a wide bandwidth.

SOLUTION: Addition means 6 sums up an electromotive force signal obtained by connecting a resistor 3 for internal integration across the Rogowskii coil and a signal generated by integrating the electromotive force signal by an external integration circuit 7 having a high-range cutting frequency f0 equal to a low-range cutting frequency of an internal integration function of the Rogowskii coil, the frequency f0 being 600-700 Hz and the gain of the external integration circuit 7 being 70-80 db.

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