The winding short circuit is often encountered in the production process, so how should we check and judge when the fault occurs? Below, we will understand together with Senli Motor Xiaobian, about the inspection method of three-phase asynchronous motor winding short circuit fault.

       1.Direct observation

       Observe whether the junction box and the end of the winding are burnt, and the winding is dark brown after overheating, and there is a smell.

       2.Temperature check

       Three-phase asynchronous motorNo-load operation30Minutes (abnormal should be stopped immediately), with the back of the hand to feel whether the winding parts exceed the normal temperature.

       3.Current judgment

       If the current of a certain phase is too large, it indicates that the phase has a short circuit.

       4.Bridge inspection

       The DC resistance of the measured winding should generally not exceed the difference5%If the above is exceeded, the phase with small resistance has a short circuit fault

       5.Short-circuit detector

       If there is a short circuit in the measured winding, the steel sheet will vibrate.

       6.Multimeter or megohm meter

       Measure any two phasesThree-phase asynchronous motorIf the reading is very small or zero, it indicates that there is a short circuit between the two phase windings.

       7.Voltage drop

       After the three windings are connected in series, the low-voltage safety AC is used to measure the voltage at both ends of each phase winding, and the group with small reading is found to have short circuit fault.

       8.Electric current

       Three-phase asynchronous motor no-load operation, first measure the three-phase current, in the exchange of two phase measurement and comparison, if not changed with the power supply change, the larger current of the phase winding has a short circuit.

       Senli Motor,19Focus on the development and production of electric motors. Available if needed1688Search factory name "Shengzhou Chaoli Electric Appliance Factory" , Or online consultation message, we will have business personnel to get in touch with you, you can also contact us directly0575-8378-1127.