caa a22 4500 606209786 CHVBK 20210128101030.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s11220-014-0100-1 doi (NATIONALLICENCE)springer-10.1007/s11220-014-0100-1 Metwally I. Department of Electrical and Computer Engineering, College of Engineering, Sultan Qaboos University, 123, Muscat, Oman aut New Side-Looking Rogowski Coil Sensor for Measuring Large-Magnitude Fast Impulse Currents [Elektronische Daten] [I. Metwally] This paper presents a new design of a side-looking "flat spiral” self-integrating Rogowski coil that is wound by twin coaxial cable with individual sheath. The coil is tested with different impulse current waveforms up to 7kA peak value to improve its performance. The coil design is optimized to achieve bandwidth and sensitivity up to 7.854MHz and 3.623V/kA, respectively. The coil is calibrated versus two commercial impulse-current measurement devices at different coil-to-wire separations, coil inclination angles, and impulse current waveforms. Distortion of the coil output voltage waveform is examined by using the lumped-element model to optimize the connections of the four cable winding sheaths and the coil termination resistance. Finally, the coil frequency response is investigated to optimize the coil design parameters and achieve the desired bandwidth (large low-frequency time constant), high rate of rise, no overshoot, very small droop, high rate of fall, and no backswing. Springer Science+Business Media New York, 2014 Side-looking coils nationallicence Rogowski coil nationallicence Impulse-current measurement nationallicence Transient analysis nationallicence Sensing and Imaging Springer US; http://www.springer-ny.com 16/1(2015-12-01), 1-18 1557-2064 16:1<1 2015 16 11220 https://doi.org/10.1007/s11220-014-0100-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11220-014-0100-1 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Metwally I. Department of Electrical and Computer Engineering, College of Engineering, Sultan Qaboos University, 123, Muscat, Oman aut NATIONALLICENCE 773 0- Sensing and Imaging Springer US; http://www.springer-ny.com 16/1(2015-12-01), 1-18 1557-2064 16:1<1 2015 16 11220