Matters need attentionbefore using deep well submersible electric pump

The deep well submersible electric pump is used in mine, an electric pump, can the comprehensive extraction on the underground water. So, often in the downhole pump or underground water will be used when using deep well submersible electric pump. Weihu pump experts summarizes for everyone today deep well submersible electric pump before use related matters.

Deep well submersible electric pump before use

1, check whether within the Wells with submersible electric pump motor in accordance with the provisions, filled with liquid. If no, then make up according to the rules.

2, the derivation of the Wells with submersible electric pump cables installed with electric cable before, with a high impedance voltmeter is testing the motor winding insulation resistance of casing, its value in the hot, under the state should not be lower than 0, 5 ohms, or inspection should be in the connection place, and find out why. If oil filled motor insulation resistance is low, should be made for winding drying, and replace the internal insulation oil.

3, check the motor and pump with the size, the amount of running the motor control in 2 mm or so, check and confirm the plate moving with shaft device, the electric water pump shaft to rotate.

4, under the Wells with submersible electric pump well before, should be dealt with seriously according to make Ming manual good cable joint insulation and sealing.

5, in to the shaft of the electric pump, not only make it completely into the water and well water temperature above 20 ℃, water pH value (pH) for 6, 5 ~ 8, 5, and the chloride ion in water is more than 400 ml/l and sediment concentration is less than 0. % Ol, to boot using the pump.

6, and protection switching systems. Electric pump is the underwater work in the well, its operation is difficult to observe, if the water pump failure runtime without protection switch protection, is very easy to damage motor windings. Usually, protection switch in Wells with submersible electric pump power supply more than 1.05 times the rated current, within the stipulated time action, in 7 times the rated current of the braking condition, the action time of protection switch shall not be more than 5 seconds.

7, to ensure that the electric pump of the three-phase winding terminal voltage is 342 ~ 418 v, voltage too high or too low will affect the normal running of water pump, and serious when will damage motor windings.

8, check and confirm the rated head of the electric pump and the head difference is less than 20% of the rated head, otherwise should pull down the primary impeller with a height the same as the mouth round collar instead of or turn down out of the water valve, make the head closer to actual rated head lift calculation formula for practical need to lift = downhole head + inoue head + head loss

9, when removing and installing a submersible electric pump well, neither pulled the cable force, also can't make the cable in the free state of suspension. When using, should every 5 ~ 10 meters cable fixed on the outlet pipe.

10, diving depth of the Wells with submersible electric pumps, usually with 2 ~ 5 meters advisable.