To avoid introducing significant unbalanced loads into the three-phase power grid,the contact net-work of electrified railways in China generally rotates phase sequence power supply every certain length.The regular operation of the automatic phase separation device requires the magnetic sensors set on both sides of the track to provide timely and accurate information about the phase separation zone.Therefore,it is necessary to use detection equipment to conduct periodic tests of the magnetic sensors.Therefore,it is necessary to use de-tection equipment to detect the magnetic inductors periodically.This article proposes an evaluation method for ground magnetic induction test equipment based on uniform magnetic fields,which uses double parallel coils with good openness to generate an extensive range of uniform magnetic fields,thus achieving technical status evaluation of ground magnetic induction test equipment without disassembly.The design principle of the dual parallel coils was analyzed through analytical and numerical calculations,and a prototype was manufactured to experimentally verify the effectiveness and necessity of the proposed evaluation method.
electric phase separationautomatic passing phase insulatormagnetic inductormagnetic induc-tion intensityuniform magnetic fielderror calibration
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