Development of nanosecond impulse Rogowski coil for high voltage

In this paper, a new self-integral Rogowski coil with magnetic core is designed, which has the advantages of high signal-to-noise ratio and wide dynamic range, for the measurement of nanosecond pulse current signal. It has shielding box open air gaps to prevent the eddy current. The outer layer of the shielding box is packaged with polyurethane encapsulation, and the polyurethane layer has a thickness greater than 1.5 mm, which can withstand more than 20 kV pulse voltage. The Rogowski coil is calibrated using a high-voltage square wave generator and a Pearson 4100 coil. The parameters of the Rogowski coil are: sensitivity 0.018 8 V/A, maximum rise time less than 20 ns, square wave pulse width 300 ns, maximum peak current 300 A.