Taboos for the use of high-lift deep well pumps

To introduce the nexthigh lift deep well pumpUse of contraindications

1. Ungrounded device

The use of grounding protection for high-lift deep-well pumps is a mandatory standard in China. Only the use of grounding protection, in order to protect the use of personal safety. If there is no grounding protection, once the casing is electrified, the water at the drain of the high-lift deep well pump and the water surface of the water will be electrified, which will seriously endanger the safety of people and animals and consume a large amount of electromagnetic energy.

If the casing of the high-lift deep well pump is connected with the grounding device that meets the national industry standard (the resistance of the grounding wire shall not exceed 4Ω), when the casing of the submersible pump is powered, the current flow forms a closed loop through the plastic casing of the submersible pump, the protective grounding wire, the grounding body, the ground, the power line connector in the transformer operation and the switching power supply. When the leakage current is unstable, especially when the neutral line of the live line touches the shell, it can make the protection equipment posture of high-lift deep well pump (circuit breaker melting or air switch tripping) and disconnect the switching power supply of the electric submersible pump.

2. No leakage protection switch is installed

High lift deep well pump work in the water, it is very easy to lead to electromagnetic energy damage and even cause safety accidents. If it is equipped with a leakage protection switch, the leakage protection switch will disconnect the switching power supply of the submersible pump only if the power value of the submersible pump exceeds the posture current of the leakage protector (generally not exceeding 30mA).

3. Reverse rotation of the motor

Nowadays, there are many types of submersible pumps that can output water both in forward rotation and overturning, but the water flow is small and the current is large when overturning, and the motor winding will be damaged if the overturning time is long. Therefore, before the submersible pump enters the water, an external power supply should be connected to check whether the movement direction is correct. If the centrifugal impeller of the three-phase submersible pump is reversed, it should be shut down immediately and the wiring of any two phases in the three-phase copper core cable in the cable can be replaced.

4. Put it into the water for a long time after stopping use.

　high lift deep well pumpIf you can't stick to it after entering the well, it will rust after a long time, resulting in failure to operate.

Stop the use of high lift deep well pump do not put into the water regardless, should be started once a week, the operation of 5~10min.

When it is not needed for a long time or soaked in water for a long time, it should be placed in the water for plug-in operation for several minutes, the mortar inside and outside the high-pressure cleaning pump should be cleaned, and then a major inspection should be carried out. All components should be disassembled for maintenance, cleaning, antirust treatment and descaling. Consumable accessories should be repaired and reassembled. After painting and antirust treatment, they should be put into a warehouse with dry and no corrosive substances.

Specification for the use of electric submersible pumps for wells

(1) Install the application for the first time

　high lift deep well pumpAfter installation, do not start directly. The submersible pump, starting equipment and instrument panel will be carefully checked and tested after verification. When starting, use the instrument to check the working voltage and current of the submersible pump, and then put into work after everything is normal.

(2) Daily inspection

The daily inspection contents include: checking the power supply current and grounding resistance before starting, and checking the working current and the operation status of the centrifugal pump after restarting. The problems found shall be handled in time, and the failure operation of high-lift deep well pump shall be prohibited.

(3) Other common problems

① There should be full-time personnel on duty when the submersible pump is running, and it should be shut down immediately for inspection in case of abnormal conditions.

② well with submersible pump start and stop, not suitable for too frequent, high lift deep well pump outside can be covered with bamboo net or iron net, to prevent large stones in the well.