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Water Because the submersible pump unit is charged to dive into the water, the sealing and insulation performance of the motor must be reliable, and the installation and use technology must be strict. A little improper will cause problems, light will aggravate the wear of parts, heavy will burn the motor can not work. Therefore, the installation and use of submersible pump units must comply with the following technical points.

Technical inspection before 1. work 1. Line inspection The value of the submersible pump should be complete and connected correctly and reliably. There must be an overcurrent protection device. If the knife switch is used, a qualified fuse must be used, and it is not allowed to be thickened or replaced by other metal wires. The cable should be connected accurately to prevent the wrong connection of the power cord on the neutral line of the motor. The connection between the lead wire of the motor and the cable must be reliable, otherwise it will produce poor contact and heat, resulting in short circuit or open circuit.

Grounding wire The motor must have a grounding wire that meets the technical standards.

After immersing in water for 22 hours, check the insulation of the motor winding to the ground with a 500V or 1000V megohmmeter, and the resistance should not be less than 5 megohms.

The pump unit shall be kept in the correct position under water. The pump shall be kept upright in water and shall not be inclined. The fixing shall be reliable, especially not buried in the soil to prevent the electric pump from burning. The diving depth should be kept 1~2 meters below the water surface and not less than 3 meters from the bottom of the well in order to pump clean water.

When the motor is used correctly during 2. operation, the gate should be closed first, and then slowly opened after normal operation to adjust the required flow rate. At the same time, observe whether the pressure gauge and ammeter are correct. The dish group should have no vibration and abnormal sound. If any of the above items is abnormal, the fault should be eliminated before work.

Always observe the instrument. When the voltage is lower than 340V and the current is greater than 20% of the rated current of the motor, the machine should be shut down for maintenance immediately.

Check insulation regularly. Regularly check the thermal insulation resistance of the motor to the ground during operation. If the resistance value is lower than 0.5 megohm, the motor shall be shut down for maintenance immediately. This insulation inspection should be carried out once a week to ensure safety.

Requirements for well water and wells. Sand content of well water should be less than 0.2%, otherwise it will damage the pump set seal. The well diameter and depth shall be adapted to the type of pump set.

The pump set should not be started and stopped frequently. When the pump set is restarted after shutdown, it must be started after the water in the pipeline is in the throat, usually at an interval of about 5 minutes. Otherwise, starting on load will increase the current too much and damage the motor.

Prevent electric leakage from hurting people. During the operation of the pump set, in order to avoid leakage injury, in addition to the leakage protection device must be installed, it is also strictly prohibited for personnel to contact the water source near the water outlet of the pump.