目前在10kV 配电线路中采用的相序测定方法,仍是接触式方法,即由测量人员用导线直接将高压线路电流从空中引到地面,再通过互感器进入仪表,然后进行测试。需要测量人员用绝缘杆将导线搭在输电线路上,故操作复杂且危险性大,容易发生高压触电事故进一步做到安全、快速、经济地开展工作。因此,迫切需要采用安全性更好、操作更简单的相序测定仪。1 感应式相序测定仪的原理 The current phase sequence measurement method used in 10kV distribution lines is still the contact method, that is, the surveyors direct the high-voltage line current from the air to the ground with wires, then enter the instrument through the transformer, and then conduct the test. The need for measuring personnel to use insulated rods to take the wire on the transmission line, so the operation is complicated and dangerous, prone to high-voltage electric shock accidents to further safe, rapid and economical work. Therefore, there is an urgent need to use a phase sequence detector that is more safe and easier to operate. 1 induction phase sequence detector principle