Submersible pump motor maintenance

Daily maintenance of submersible pumps. Check the power cord every day without damage, the absolute prohibition of leakage of submersible pump water operations. Check the pump body every day for damage, to ensure that the motor at work without leakage. After the operation, should be promptly clean up the debris attached to the pump, the pump rinse. In order to ensure the normal operation of submersible pumps, must be in accordance with the following requirements. Stainless steel submersible pump before use, shall use the megger to check the motor insulation resistance, the minimum value can not be less than 50MΩ.
Flooding motor should be open irrigation plug, filled with clean water and then tighten the screw plug, screw plug irrigation can not be screwed directly into the well. Check the cable for breakage before use. If damage should be replaced in time to prevent leakage. Submersible pump in the water before the pump should be injected into the water, and then idle for 1-2 minutes, and start twice to check whether the normal start and idle, turn to meet the requirements. If the steering is reversed, replace any two-phase wiring. Check the water pipe is cracked, the connection is firm. Submersible pump down and lifting, never allowed to pull the cable to avoid damage to the cable or disconnect the joints, resulting in undue accidents. Wire or card board should go down and lifting.
The supply voltage should be controlled within ± 5% of the rated voltage so that the motor can operate normally. If the voltage is too low or too high, the motor can not continue to use, so as to avoid long-term motor over-voltage or undervoltage damage. Submersible pump submerged into the water should be vertical hanging, not diagonal. Into the water depth of 5 meters under the moving water level is appropriate. Submersible pump shall not transport high water content of sand or mud. Submersible pump the actual head should be 0.8-1.1 times the rated head in use, in order to improve unit efficiency, energy conservation, while avoiding motor overload.
Submersible pump motor wiring must be real, in order to avoid the motor phase running motor burned. Cable must always check for cracks, abrasions, etc., there is a timely replacement or repair. Oil immersed motor if the phenomenon of oil spills should be promptly to the factory or repair point of repair, replace the sealing element. Flooding motor should always clean the sand inside the motor cavity, replace the motor cavity water. Submersible pump running six months after the maintenance inspection should be to replace the damaged parts. Submersible pump, the flooding motor should be placed within the net motor water, the pump clean, coated with oil rust, and stored in a dry place.
Submersible pump does not start after the water, less water or intermittent water
The reasons for the failure are: over-current parts such as filters, impeller, diversion shell, Yang pipes and other components are blocked, or Yang pipe fracture, which often occurs when the ammeter readings increase and the pointer violent swing, unit, pipe vibration Unit, but the water is less, because some of the over-current part of the blockage, supporting unreasonable, or need to lift more than the pump rated head too much, in which case, the pump should be replaced, The need for a higher head of the pump, the impeller is also possible to reverse the direction, just the introduction of any two-phase connection can be, in the case of excessive wear ring seal or impeller, should replace the seal ring, repair or replacement of new Impeller; unit rotation is normal, but not water, mainly due to the moving water level in the pumping process down too much, can be closed on the small water valve, reducing the water, or pump down, if the depth of the pump reaches or exceeds the pump requirements The use of the range is still not ideal, then the pump used properly, should be for a smaller flow pump.