Detailed introduction of fire-fighting mechanical emergency starting device:
According to the standard GB50974-2014 "Technical Specifications for Fire Water Supply and Fire Hydrant Systems", pressure starting, remote starting and hard-wire starting are all achieved through relays to automatically start the pump. If the relay and weak current signal fail to automatically start the fire pump, the fire pump should be directly started by the "mechanical emergency starting device" set in the fire pump control cabinet. The "mechanical emergency starting device" is a device that directly starts the fire pump through direct transmission of a mechanical interlocking device. The device can be configured with two modes: star-delta starting and reduced-voltage starting. The starting handle of the "mechanical emergency starting device" is usually in a stopped state (with a lock), and must be operated by the *manager in case of an emergency fire.
The output of the "mechanical emergency starting device" is connected to the output terminal in the original control cabinet to achieve emergency direct starting of the fire pump. When starting, the manual starting handle is pressed 90°, and the fire pump is started by star-delta starting and reduced-voltage starting according to the electrical distribution. The pump is stopped manually by a person with management authority (the pump cannot be stopped automatically or manually stopped in case of a fire alarm).