Submersible pump suddenly does not turn the main reason

1, submersible pump protection switch tripping or fuse blown, under normal circumstances, the occurrence of switch tripping or fuse off phenomenon is due to the electric pump current increases caused. Submersible pump pump current increase caused by the following reasons:
(1) in terms of the use of centrifugal pump head is too low. The axial pump is used in terms of head is too high.
(2) the supply voltage is low, so that the operating current of the pump more than the rated current.
(3) electric pump two-phase operation.
(4) reverse pump operation.
(5) electric pump pumping mud water or dirt, due to the increase in the proportion of transmission fluid will cause the current increase.
(6) submersible pump pump mechanical failure. Impeller, sealed box, sleeve, bearing or fixed, the rotor core and other parts of the mechanical jam phenomenon.
2, power off or phase failure.
3, submersible pump pump outlet box part of the water, the connection line part of the outlet box, due to damage to the cable, like plastic expansion ring is not compacted, O-ring seal defects have not reached the purpose of sealing and other reasons, will So that outside the water leakage into the outlet box, causing the cable core and ground due to blown. Encountered this failure, must open the outlet box part of the broken connection, and wrapped with insulating tape, and then eliminate the outlet box leakage reasons, then the original assembly is good, you can continue normal use.