Inspection and preparation of deep well submersible pump.
1, should be can lift more than 3 meters high, can withstand the units of all the weight lifting equipment (preferably in crane) and tripod, card board, wrench, screwdriver, wire clamp, 500 v megohmmeter, insulating rubber adhesive belt such as equipment installation.
2. Check whether the installation size of the motor is in line with the installation size of the pump, and whether the motor power is appropriate.
3. Check whether the voltage and frequency of the power supply are consistent with the motor nameplate, and whether the control cabinet parameters are matched with the motor.
4. Check whether the power cable is damaged, its specification is reasonable, and the cable is broken into the water for 6 hours. The insulation resistance meter of 500V is used to measure the insulation resistance of the ground to be no less than 500 megol. (the insulation resistance of a single finger to the water)
Connect the cable to the power cable.
1, stripping cable outer sheath and the main insulation layer, with copper wire 35-40 mm, conical rubber, that are close to the core part of the line core the oxide layer on the polished clean, and use alcohol wipe wire core (had better use hydrochloric acid) and to bind up insulation, sheath layer and makes it dry naturally.
1) power cable 2) PVC adhesive tape 3) self-adhesive butyl rubber band 4) 1mm copper wire 5) solder 6) lead to cable.
3. Prepare 500W electric soldering iron, rosin, soldering tin, LMM bare copper wire and insulation tape.
4. Evenly tie the cable core with bare copper wire, and use electric soldering iron to heat and penetrate tin. Repair the flat welding parts with a file (no burrs and spines), and clean them again with alcohol to dry.
5. First, use self-adhesive butyl adhesive tape with three layers, and gradually extend to the outside of the core. When dressing, the adhesive tape must be stretched 200%, and the outer layer will be coated with polyvinyl chloride, and the third layer will be extended to the outside to ensure that the dressing part is not shorter than 200mm.
6. The three joint positions should be staggered at a certain distance to prevent short circuit.
7. The connection method when the cable is used as the double lead cable.
1) the insulation resistance of the cable and motor (without water) shall be measured after the end of the cable, and its value shall not be less than 150 megohm.
2) when the motor is filled with water, the insulation resistance of the motor winding shall be no less than 40 megaohm.
3) turn on the power test (no more than 2 seconds). To do a good job of marking,
4) start the well: the next well continuous wave measuring insulation resistance at the same time observation of the change in case the wall hanging broken cable insulation skin, if it is found that the insulation level fell sharply to 0.5 ohms to unit to be brought to detect when the following reasons. If there is no accident, you can start the test run with the steps mentioned above.
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