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根据《消防给水及消火栓系统技术规范》GB50974-2014标准11.0.12条规定，本条为强制性条文，压力启动、远程启动和硬拉线启动都是通过继电器来实现自动启泵的，若继电器和弱电信号故障不能自动启动消防泵时，应依靠消防泵控制柜设置的“机械应急启动装置”直接启动消防泵，当弱电信号和硬拉线启泵继电器故障且消防泵控制柜内二次线路故障和电器故障不能使消防泵自动或手动启动，所以在火警紧急情况下，本条强制规定只要在正常供电情况下，无论消防泵控制柜内控制线路损坏如何，都能强制直接启泵，以保证火灾时扑救及时性，该“机械应急启动装置”是通过机械连锁装置直接传动，来实现直接启动消防泵的装置。该装置可配置星三角启动和软启动启动两种方式。“机械应急启动装置”启动手柄平时处于停止状态(带锁)，紧急火警时必须由被授权的管理人员操作(机械应急启动装置带锁，平时由有权限的人保管，且此时从报警到消防泵正常供水的时间不大于5min，这个时间包含了管理人员从控制室到泵房的时间以及包括消防泵从强制启动到正常供水的时间)。

According to article 11.0.12 of technical code for fire water supply and hydrant system (gb50974-2014, this article is mandatoryPressure start, remote start and hard pull start are all realized by relay. lf the relay and weak curent signal fail to start the fire pumpautomatically, the "mechanical emergency start device" set in the fire pump control cabinet shall be used directly Start the fire pump.When the weak curent signal and the hardwire start-up relay fail, and the secondary circuit and electrical equipment fall in the fire pumpconrol cabinet, the tre pump cannot be started automatically or manualy. Therefore, in case of fire emergency, this article stipulates thathe fire oump can be started direcily under normal power supoly, no malter how the control circuit in the fire pump control cabinet isdamaged, so as to ensure the fire Fire fighting timeliness, the "mechanical emergency starting device’is directly driven by themechanical interlock device to realize the direct start of the fire pump. The device can be configured with star delta star and sot startThe starting handle of 'mechanical emergency starting device"is in the stop state (with lock) at ordinary times. In case of emergency fireit must be operated by the authorized management personnel (mechanical emergency starting device with lock, usually kept by theauthorized person, and the time from the alarm to the normal water supply of the fire pump is not more than 5min, which includes the timerom the control room to the pump room and the time from the management personnel to the pump room as well as the time from the irepump room Time from forced start to normal water supply).