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由长春煤矿设计院与鸡西矿务局正阳煤矿共同研制的“矿井6kV电网中性点经消弧线圈并联电阻接地方式”,于1991年6月通过了东北公司组织的技术鉴定.
By the Changchun Coal Mine Design Institute and Jixi Mining Zhengyang Coal Mine jointly developed a “mine 6kV neutral point through the arc suppression coil parallel resistance grounding”, in June 1991 passed the Northeast company’s technical appraisal.