Submersible pumps are compact and lightweight, playing an important role in production and daily life. The following points should be noted during use:
1.When purchasing a submersible pump, attention should be paid to the model, flow rate, and head. If the specifications are not appropriate, sufficient water output will not be obtained, and the efficiency of the unit cannot be fully utilized. In addition, it is necessary to clarify the direction of rotation of the motor. Some types of submersible pumps can produce water in both forward and reverse directions, but the water output is small and the current is high in reverse, which can damage the motor winding. To prevent electric shock accidents caused by leakage during underwater operation of submersible pumps, a leakage protection switch should be installed.
2.When installing a submersible pump, the cable should be overhead and the power line should not be too long. When the unit is launched, do not put any force on the cables to avoid causing the power lines to break. Do not sink the submersible pump into the mud, as it may cause poor heat dissipation and burn out the motor winding.
3.Try to avoid starting up at low voltage. The power supply voltage should not differ from the rated voltage by more than 10%. If the voltage is too high, it can cause the motor to overheat and burn out the winding. If the voltage is too low, the motor speed will decrease. When it does not reach 70% of the rated speed, the starting centrifugal switch will close, causing the starting winding to be energized for a long time and generate heat or even burn out the winding and capacitor. Do not frequently turn on and off the motor. When the electric pump stops running, it will generate backflow. If it is turned on immediately, it will cause the motor load to start, resulting in excessive starting current and burning out the winding.
4.Do not let the submersible pump operate at overload for a long time, do not pump water with high sediment content, and the dehydration operation time of the submersible pump should not be too long to avoid overheating and burning out the motor. During the operation of the unit, the operator must observe at all times whether the working voltage and current are within the values specified on the nameplate. If they do not meet the requirements, the motor should be stopped, the cause should be identified, and the fault should be eliminated.
5.Check the motor regularly. If cracks are found on the lower cover, damaged or ineffective rubber sealing rings, etc., they should be replaced or repaired in a timely manner to prevent water from seeping into the machine.
