Honeywell's CSNS230-500 closed-loop current sensor utilizes magnetoresistive or Hall-effect principles to accurately measure AC, DC, and impulse currents. It features a null balance or zero magnetic flux method (feedback system) for constant magnetic flux control. Applications include variable speed drives, overcurrent protection, ground fault detectors, current feedback control systems, robotics, UPS, welding power supplies, battery management systems, and wattmeters. The sensor provides high electrical isolation and a competitive cost/performance ratio.