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Electric pump suddenly does not turn |
(1) protection of switch trip or fuse
(2) power disconnection or phase breaking
(3) the outlet box of the submersible pump is inflow and the connection line is burned
(4) burn out of stator winding |
(1) to find out the specific reasons for the switch trip or fuse of the protective switch, and then adjust and eliminate the remedy to the case.
(2) connect the wire
(3) open the line box, connect the insulation tape on the broken line bag, eliminate the cause of the leakage of the outlet box, and assemble it according to the original sample.
(4) overhaul the stator winding. In addition to the timely replacement or maintenance of the stator windings, the fundamental reasons for the failure should be found in accordance with the specific conditions and the failure to be eliminated. |
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Stator winding burnout |
(1) grounding wire fault connection power line
(2) the fault phase work, at this time the current is much larger than the rated value, the winding temperature rises very high, the long time will cause insulation aging and damage the stator winding.
(3) the mechanical seal is damaged and leaks, and the insulation resistance of the stator winding is reduced and the damaged winding is reduced.
(4) the impeller is stuck, the tortoise pump is in the three-phase braking state, and the current is about six times of the rated current, such as no switch protection, it will burn out the winding quickly.
(5) the end of the stator windings of the submersible pump shell, and the ground breakdown
(6) the submersible pump is open and stopped too frequently
(7) the dehydrated operation time of the submersible pump is too long |
(1) correctly connect the grounding wire in the cable of the submersible pump to the grounding wire or temporary grounding wire of the power grid
(2) to find out the cause in time, to connect the power line of the broken phase, or to replace the cable.
(3) often check the insulation resistance of the submersible pump, when the insulation resistance falls, take measures to repair it in time.
(4) take measures to prevent debris from entering the submersible pump and hold the impeller. Pay attention to check the mechanical damage of the submersible pump and prevent the impeller from being stuck due to some mechanical damage. At the same time, in the course of operation, once the water pump suddenly does not come out of water, it should be shut down immediately and take appropriate measures to repair it.
(5) winding line to handle to block both ends of the upper and lower cover, and remove the existing on the surface of lump iron, avoid winding ends meet housing assembly
(6) do not turn on or turn off the electric pump too often, avoid the overload of the submerged pump or bear the unnecessary impact load. If necessary, restart the submersible pump, and then wait for the water in the pipeline to reflux and then start again.
(7) in operation, we should pay close attention to the decline of the water level, so that the electric pump can not run long time (greater than 1min) in the air and avoid the lack of heat dissipation and lubrication conditions of the submersible pump. |
