Electric fire pump is a kind of water supply device widely used in hospitals, shopping malls, office buildings and residential buildings in the middle and high-rise buildings, when an accidental fire, start the fire pump can ensure that the water pressure in the pipe network to meet the requirements of the fire extinguishing device, so that the fire is timely put out. In China, the fixed electric fire pump water supply system generally adopts the mode of one (or more) main pump with one (or more) standby pump, and is equipped with a special control cabinet to achieve the control of the fire pump.