Zero-flux leakage current sensor, a microcurrent sensor designed for online insulation monitoring of high-voltage electrical equipment.This sensor accurately detects industrial frequency currents ranging from 10μA to 10A, with an accuracy of 0.03% and a定点 phase error less than 0.01°. ProductSelecting cores made from materials with a high initial permeability, employing high-precision rectifying circuits and multi-layer metallic shielding, the product can compensate for the excitation current of the iron core, enabling it to operate in a relatively ideal zero flux state. The product boasts excellent temperature characteristics and electromagnetic interference resistance, ensuring normal operation in environments with strong electromagnetic interference.