Small submersible pumps are small and lightweight, and play an important role in farmland irrigation and water use in farmhouses. In order to avoid accidents during use, prolong service life, and exert its excellent performance, attention should be paid to the following points when using:
Install a leakage protector. Submersible pumps work underwater and are prone to electrical leakage causing electrical losses and even electrical shocks. If an electric leakage protector is installed, as long as the leakage of the submersible pump exceeds a certain value (generally not exceeding 30 mA), the electric leakage protector will cut off the power of the submersible pump to avoid power leakage and ensure safety.
When installing the submersible pump, the cable should be overhead and the power cable should not be too long. When the submersible pump is launched into the water or raised, do not apply force to the cable to avoid breaking the power cord. Do not sink into the mud while the submersible pump is working, otherwise it will cause the motor to dissipate heat and burn out the motor winding. When installing, the insulation resistance of the motor should not be less than 0.5 megohms.
Try to avoid booting when the power supply voltage is abnormal. The power supply voltage and rated voltage must not differ by 10%. If the voltage is too high, the motor will overheat and the winding will burn out. If the voltage is too low, the motor speed will drop. If the rated speed is less than 70%, the starting centrifugal switch will close, causing the starting winding. Prolonged energization generates heat and even burns out the windings and capacitors.
Do not switch the motor on and off frequently. This is because the electric pump will generate back flow when it stops. If it is turned on immediately, the motor load will start, causing the starting current to be too large and the winding to burn out.
Do not allow the pump to run for a long period of time. Do not pump water with a large amount of sediment. The dehydration time of the pump should not be too long to avoid overheating and burning the motor. During the operation of the unit, the operator must observe at any time whether its working voltage and current are within the values ​​specified on the nameplate. If it does not meet the requirements, the motor should be stopped, the cause must be found out and the fault should be eliminated.
The direction of rotation of the motor must be correct. The direction of rotation of the motor should be known. There are many types of submersible pumps that can discharge water when they are rotating forwards and backwards. However, when the reverse rotation is small and the current is large, a long reversal time can damage the motor windings.
Always check the motor regularly. If it is found that there are cracks in the bottom cover, and the rubber seal ring is damaged or invalid, it should be replaced or repaired in time to avoid water seeping into the submersible pump.
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