Submersible pump in use what are the precautions

1. Startup:
(1) Submersible pumps up to 11 kW allow direct start-up. Submersible pumps up to 13 kW shall be equipped with a step-down starter to protect submersible pumps safely.
(2) In order to avoid submersible pump rotor momentarily channeling and reduce the starting load, the submersible pump should be activated to the outlet valve trip to 3 / 4. (Leave 1/4 air gap to deflate) Slow open to pump operating point control in place.
(3) After the start-up is completed and started, the monitoring and observation of water level should be strengthened to ensure that the submersible pump operates within the working conditions, and the submersible pump can be put into formal operation after it runs smoothly.
(4) After the submersible pump is put into operation for 5 hours for the first time, the thermal insulation resistance should be measured quickly when it is shut down, and its value should not be less than 0.5MΩ.
2. stop pump:
Before the submersible pump is shut down, in order to prevent the reverse flow of water, turn off the valve while cutting off the power.
3. Operation and maintenance.
(1) The submersible pump should work at the design working point, the axial force is moderate, the pump efficiency is the highest, the most economical and reliable.
(2) Every 8 hours of operation, the submersible pump should be inspected once, whether there is any change in each meter, whether the circuit node is hot, the sound is normal, and whether the normal working current is greater than the rated value of the motor brand name.
4. In any of the following situations, stop the pump immediately.
(1) The pump current suddenly higher than the rated current of the motor.
(2) out of water is not normal, intermittent water.
(3) Motor insulation resistance is less than 0.5 megohms.
(4) The unit has obvious noise and aggravating.
(5) The grid voltage is insufficient, less than 5% of the rated voltage.
(6) Fuse burned one phase (7) water pipeline damage 5. Use maintenance precautions.
(1) Check the current voltage and the outlet pressure daily Check the water level every 2 weeks and make a record.
(2) Inspect the motor insulation resistance every 4 weeks and make a note of it.
(3) use to minimize the number of starts.
(4) If the submersible pump is not used continuously after going down, it should be switched on once a week and run for 5-10 minutes to prevent the submersible pump from starting due to corrosion.
Submersible pump storage and handling.
When storing the submersible pump, put the net water in the motor chamber and dry the surface. The shaft coupling must be coated with anti-rust grease. It should be erected (to prevent the rotor from deforming.) In dry. Place. Store in winter temperature not lower than -3 degrees Celsius.

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