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全苏防爆矿山电气设备科学研究所于1979～1981年期间研制成功供ΠΗБ-4Д型连续运转矿用装载机走行部分(双速)、工作机构和卸载运输机(单速)传动用的ВРП250型电动机。ВРП250型电动机可用于采矿工业和矿井建筑业的全部领域,其中包括用于井下巷道以及用在可能发生甲烷和燃点高于200℃的有爆炸危险的混合气体的户内外装置中。该电动机为防爆ВР-ЗВИ型。在气候型式方面,这种电动机既可供苏联国民经
All Soviet explosion mine electrical equipment Institute of Science and Technology during 1979 ~ 1981 developed for the ΠHБ-4Д continuous operation of mining loader running part (two-speed), work institutions and unloading transporter (single speed) with the transmission of the motor type ВРП250 . The ВРП250 motor can be used in all areas of the mining industry and mine construction industry, including in indoor and outdoor installations for downhole applications, as well as in potentially explosive mixtures of methane and ignition temperatures above 200 ° C. The motor is explosion-proof ВР-ЗВИ type. In terms of climate type, this kind of motor can be used for the Soviet Union