The key technique includes the contact vacuum starter, pressure maintaining equipment for vacuum, the safety control in the vacuum drainage, the design and calculation method for the vacuum drainage.
真空接触启动、真空保压设备、系统安全监控以及系统的设计计算是真空排水系统的技术关键。
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 mechanical block system for combined vacuum electromagnetic starter with multiple quick open-door is presented.
介绍了多个快开门组合真空电磁起动器的机械闭锁装置，对两种机械闭锁装置优缺点作了对比分析。
The mechanical block system for combined vacuum electromagnetic starter with multiple quick open-door is presented.
介绍了多个快开门组合真空电磁起动器的机械闭锁装置，对两种机械闭锁装置优缺点作了对比分析。
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