Inspection and preparation

Inspection and preparation of the deep well submersible pump before going down the well

1. There should be lifting equipment capable of hoisting the height of more than 3 meters, which can withstand the whole weight of the unit (preferably with a crane), and a tripod, card board, wrench, screwdriver, nipper, 500V megohmmeter, insulating rubber Self-adhesive tapes and other installation equipment.

2. Check if the installation size of the motor matches the installation size of the pump and whether the motor power is suitable.

3. Check whether the voltage and frequency of the power supply match the nameplate of the motor, and whether the parameters of the control cabinet used are matched with the motor.

4. Check whether the power cable is damaged or not. The specification of the power cable is reasonable. The cable is intruded into the water for 6 hours. The insulation resistance of the ground should be no less than 500 megohms with a 500V insulation resistance meter. (Insulation resistance of water at the joint of a single finger joint)

Docking

Connecting the cable to the power cable

1. Strip the outer sheath of the cable and the main insulation layer, expose the copper wire 35-40mm, trim the rubber near the core part, polish the oxide layer on the core, and use alcohol (preferably hydrochloric acid) ) Wipe the core and the insulation layer and sheath layer to be wrapped and let it dry naturally.

2, connector

1) Power cable 2) Polyvinyl chloride tape 3) Self-adhesive butyl rubber tape 4) φ1mm copper wire 5) Solder 6) Lead-out cable

3. Prepare 500W electric soldering iron, rosin, solder, lmm bare copper wire and insulating tape.

4. Evenly tighten the cable core with bare copper wire, use electric soldering iron to heat and infiltrate tin, and require penetration and seepage. Use a trowel to repair the flat welded part (no burrs and sharps are allowed), and wipe the part to be wrapped again with alcohol and let it dry.

5. Firstly, use a self-adhesive butyl tape to laminate three layers and gradually extend to the outside of the core. When wrapping, the tape must be stretched by 200%, and the outer layer is then laminated with three layers of polyvinyl chloride tape, and gradually extended outward to ensure that the wrapping portion is not shorter than 200 mm.

6. When the three-core cable connector is connected, the three connector positions should be shifted by a certain distance to prevent short circuit.

7. Wiring method when the cable is double-lead cable

1) After the cable is connected, shake the insulation resistance of the cable and the motor (when no water is added), the value is not less than 150 megohms.

2) After the motor is filled with water, shake the insulation resistance of the motor winding again to be no less than 40 megohms.

3) Turn on the power test (no more than 2 seconds). Do a good job of marking the position.

4) Start down the well: While under the well, continuously measure the insulation resistance to observe the change to prevent the cable wall from damaging the cable insulation. If the insulation level drops to below 0.5 MΩ, the unit should be put up to detect the cause. If there is no accident, you can start the test by the steps mentioned above after the completion of the downhole.

Shanghai Shenba Pump Co., Ltd. is located in Jinxi Industrial Park, Daxi Town, Wenling City, Zhejiang Province. It is a professional manufacturer of various deep well pumps. Its products are widely used in domestic water intake, fire protection, mineral production, water industry transportation, farmland irrigation, etc. occasion