What are the taboos of using submersible pumps?

Submersible pumps have been widely used, but do you know? If used improperly, it is easy to be dangerous. Today, the editor of the submersible axial flow pump will tell you what precautions should be taken when using the submersible pump. Let's take a look together. :
Protective grounding of submersible pumps is a requirement of national mandatory standards. Only by adopting protective grounding can the personal safety during use be ensured. If there is no protective grounding, once the casing leaks electricity, the water at the water outlet of the submersible pump and the surface of the pumped water will be electrified, endangering the safety of people and animals, and wasting a lot of electric energy at the same time.

If the metal casing of the submersible pump is connected to the grounding body (grounding resistance not greater than 4Ω) that meets the national standard, when the casing of the submersible pump leaks, the current passes through the metal casing of the submersible pump, the protective grounding wire, the grounding body, the earth, and the work of the transformer. The ground wire and the power supply form a closed loop. When the leakage current is too large, especially when the live wire touches the shell, the protection device of the submersible pump can be activated (fuse blown or air switch tripped), and the power supply of the leakage submersible pump can be cut off.

Do not install leakage protector

The submersible pump works in water, and it is easy to leak electricity and cause power loss or even electric shock accidents. If a leakage protector is installed, as long as the leakage value of the submersible pump exceeds the operating current value of the leakage protector (generally not exceeding 30 mA), the leakage protector will cut off the power supply of the submersible pump.

The motor rotates in the opposite direction

Now there are many types of submersible pumps that can discharge water in both forward and reverse rotations, but the water output is small and the current is large during reverse rotation, and the motor windings will be damaged if the reverse rotation takes a long time. Therefore, before the submersible electric pump enters the water, it should be connected to the power supply to check whether the direction of rotation is correct. If the impeller of the three-phase submersible pump is reversed, it should be stopped immediately, and the wiring of any two phases of the three-phase core wires in the cable can be replaced.

Leave it in water for a long time after stopping use

If the submersible pump is not used continuously after going down the well, it will rust after a long time, resulting in failure to start.

The submersible pump that is not in use should not be left alone in the water. It should be turned on once a week for 5 to 10 minutes.

When not in use for a long time, it is best not to soak in water for a long time. It should be placed in clean water and run for a few minutes to clean the mud inside and outside the pump, then lift it out of the water and dry it, conduct a major inspection, and disassemble all parts for maintenance, scrubbing, and rust removal. Descale, replace the wearing parts, and then reassemble, paint and rust-proof, and put it in a dry, non-corrosive gas warehouse.

The above are the precautions for using submersible pumps that Xiaobian told you. If you want to know more about submersible axial flow pumps, submersible mixed flow pumps and deep well submersible pumps, you can browse our official website or contact us directly. Will provide you with more professional information!