一不能自动加速原因泊前交流拖动矿并提升机使用的继电器——接触器电控设备，据文献Clj介绍，起动加速阶段多设计制造成以电流为主附加时间校正的原则，自动控制转子全局电阻的切除，从而实现提升机自动加速。三相交流继电器JLJ型号JL7，线四项定电流SA。转手电阻延时继电器日 A can not automatically accelerate the reasons for the exchange of pre-docking mine hoist and hoist using the relay - contactor electronic control equipment, according to the literature introduced by Clj, starting acceleration phase design and manufacture of more current-based additional time correction principle, automatic control of the rotor Global resistance of the cut, so as to achieve automatic acceleration of the elevator. Three-phase AC relay JLJ model JL7, line four constant current SA. Relay Resistance Delay Relay Day