For the automatic start of fire pumps used for some years, the following measure should be done:
First, it is recommended to stop the operation of the fire pump, and then switch on the automatic switch of the electric control cabinet of the computer room to the local manual, then turn off the main circuit of the fire pump, carefully observe the situation, and make a record.
Secondly, check comprehensively inspection the fire pump itself to see if there is a fault. In particular, confirm whether the components of the fire pump control cabinet can work properly, and then turn the electric control cabinet into an automatic state, and check whether the coil voltage of the automatic loop control is normal. Generally speaking, if the coil voltage is 220V, it means that the fire hydrant button circuit is connected or the control circuit is short-circuited. If the voltage is not 220V and lower than the power supply voltage, the hydrant button control loop has insulation degradation problem.
In addition, check if the status of the fire hydrant button is normal, whether there is any action or damage. It is suggested to restore the button action to see if there is a vision.
Finally, check the button control whether there is a loop open or the insulation resistance is reduced. If so, it is better to replace the local line.
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