Submersible pumps are small and lightweight, and play an important role in rural production and life. Attention should be paid to the following points when purchasing and using:
First, buy
When purchasing a submersible pump, pay attention to its type, flow and head. If the selected specifications are not appropriate, it will not be possible to obtain sufficient water output and the unit's efficiency will not be achieved. In addition, the direction of rotation of the motor should also be known. Some types of submersible pumps can produce water when they are rotating forwards and backwards. However, when the reverse rotation is small and the current is large, the reversal of the motor will damage the motor windings. In order to prevent leakage when the submersible pump is operating underwater, an electrical leakage protection switch should be installed.
Second, install
When installing the submersible pump, the cable should be overhead and the power cable should not be too long. Do not apply force to the cables when the unit is in water, as this may cause the power cord to break. The submersible pump should not sink into the mud, otherwise it will lead to poor heat dissipation and burn out the motor windings.
Third, use
1. Try to avoid booting at low pressure. 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. Rotor pumps 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.
2. Do not let the pump run over 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.
3. Check the motor more than usual. If it is found that there are cracks in the bottom cover, and the rubber seal ring is damaged or invalid, it should be promptly replaced or repaired to prevent water infiltration into the machine.
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