Common faults in fire pumps, in general, are also varied. Different types of fire pumps may have different faults and different frequencies. Today, let’s take a look at the overheating of the power motor supporting the fire pump. how to respond?
一, the reason of the motor
The fire pump is equipped with a supercharged power motor. First of all, it is necessary to consider whether the motor is faulty. For example, the connection of the relevant line is wrong, resulting in a rapid increase in the temperature of the motor. Or, the stator winding of the motor has a phase-to-phase short circuit, a turn-to-turn short circuit or local grounding. When the light is light, the motor is partially overheated, and the insulation is burnt out in severe cases; if the squirrel cage rotor is broken or defective, the temperature of the iron core will rise rapidly after the motor runs for 1 to 2 hours; or if the ventilation system fails, the fan should be inspected for damage. Whether the direction of rotation is correct, whether the ventilation passage is blocked, or the motor bearing is worn, resulting in a rapid rise in the temperature of the core, a serious smoke from the motor, or even a burning of the coil.
二, the power supply impact
In general, the high or low voltage of the fire pump will affect the operation of the fire pump power motor. For example, the voltage variation range should be +10% to -5% of the rated value, which will cause the motor to overheat. Explain that the voltage required for the operation of the
fire pump needs to be determined according to the requirements. In the fire pump operation system, whether the power supply voltage meets the standard is the key to determine whether the fire pump related equipment is operating normally.
三, the impact of the pump
The fire pump is equipped with a power motor that is overheated. The reason may be that the power of the pump is not matched. When the motor is overloaded for a long time, the motor temperature will rise. In addition, the pump starts too frequently and the uninterrupted work is also the cause of the motor overheating. For this reason, it is also very important to pay attention to the frequency of use.
四, the environmental impact
The environment in which the fire pump is located is also the key to determining the frequency of fire pump failures. For example, the environment where the fire pump is located is humid, and the motor winding is wet or dust, oil, etc. adhere to the winding, which will cause the insulation to decrease. The environment is dusty, not cleaned, or the temperature is too high, etc. will cause various failures of the fire pump, which inevitably has the supercharged power motor of the fire pump.