Development of Clamp Current Meter using a Flexible Rogowski Coil

Flexible Rogowski 코일을 이용한 클램프형 전류 센서의 개발

A Rogowski coil can measure alternating currents from a few amps to over 1 million amps in a frequency range from less than 0.1 Hz to about lMhz. A Rogowski coil provides an induced output voltage which is proportional to the rate of change of the primary current enclosed by the flexible or the rigid coil-loop. Therefore, it is necessary to integrate the output voltage in order to produce a voltage proportional to the current. Also. it can reproduce the current waveform on an oscilloscope or any type of data acquisition device. This paper describes the practical design of the combination of a Rogowski coil and an integrator which provides a versatile current measuring system to accommodate a wide range of frequencies, current levels and conductor sizes.