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由中国矿业大学承担的国家“七·五”科技攻关项目——煤矿井下漏电保护系统及装置,1990年12月23日至24日在天津通过了中国统配煤矿总公司组织的鉴定。 该漏电保护系统分高压(6kV)和低压(380/660V)两部分。 高压漏电保护系统由地面变电所、井下
The national “Seventh-Five-Year” scientific and technological project undertaken by China University of Mining and Technology - the underground mine leakage protection system and installation passed the appraisal organized by China National Coal Mine Corporation from December 23 to December 24, 1990 in Tianjin. The leakage protection system points high voltage (6kV) and low voltage (380 / 660V) two parts. High voltage leakage protection system by the ground substation, downhole