Submersible pump stator winding fault inspection method is: dry and oil filled type submersible electric pump stator winding short circuit occurs, due to the large short-circuit current, short circuit in overheating, easy insulation aging, coke, crisp, therefore, can use visual inspection of the stator winding insulation scorch place, coke taste and smell check, usually is usually a short circuit in stator winding.
Conditional, simple instrument are available for inspection: in series with the stator winding for three current meter, and then into the low voltage, if the three-phase current meter reading large difference (normal, three-phase current meter readings are not more than 10%. If a difference of more than 10%, showed abnormal situation), the current reading is most likely a phase short circuit phase. Because submersible pump stator winding short circuit is equivalent to a part of the coil in parallel, the phase of the stator winding dc resistance is reduced, the current will become bigger. If use a bridge to check, than the current meter check convenient: as long as the use of bridge submersible pumps in each phase of the stator winding dc resistance, such as the three-phase stator winding resistance differs in more than 5%, the resistance of stator winding is most likely a phase short circuit of a photograph. If there are any short circuit detector, can directly measure the part of the stator winding short-circuit: first the short circuit detector and an ammeter in series connected to the power supply, and then put short circuit detector in submersible pump stator inner circle on the surface of the stator slot, one slot.
If the check to a trough of submersible pump ammeter reading increases suddenly, suggests that the groove of the coil short circuit occurred.
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