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由煤扶科学研究总院上海分院研究设计,浙江桐乡煤矿机械厂电器分厂和温州状元矿山电器厂试制的BXL_1—200/400K型相敏过流保护器,已于1989年5月通过了中国统配煤矿总公司技术发展部的鉴定。该保护器采用相敏检测和负序分量原理,解决了矿用馈电开关过流保护区分电动机起动电流与
BXL_1-200 / 400K phase-sensitive over-current protection device trial-designed by Coal Science and Technology Research Institute Shanghai Branch, Zhejiang Tongxiang Coal Mine Machinery Factory Electric Appliance Factory and Wenzhou Zhuangyuan Mine Electric Appliance Factory was approved by China in May 1989 Unified coal mine head of the Ministry of Technology Development appraisal. The protector phase sensitive detection and negative sequence component principle to solve the mining feed switch overcurrent protection distinguish between the motor starting current and