The paper introduces the working principle, control, protection and related performance of QJZ—400/1140(660) mine flameproof and intrinsically safe vacuum electromagnetic starter.
介绍QJZ—400/1140（660）矿用隔爆兼本质安全型真空电磁起动器的工作原理、控制、保护及相关性能。
The paper develops and designs BQC-25 flameproof portable electromagnetic starter for mine in view of the problems of similar starter occurred for use underground coal mine.
针对原矿用隔爆型手提式起动器在井下使用中的所存在的问题，本文开发设计了BQC-25矿用隔爆型手提电磁起动器。
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