Today, Senli Motor Xiaobian will take you to a simple understanding of the handover test method of three-phase asynchronous motors, and first briefly describe the insulation resistance and absorption ratio of measuring windings.

       First of all, when you do this. Need toThree-phase asynchronous motorAfter power failure and safety measures are taken, it is necessary to open the junction box to remove the power cord, short circuit and ground the non-measured phase, megohm meterEEnd to the motor housing or ground wire, drive the megohm meter to the rated speed when the pointer points∞When using an insulating tool willLThe end is immediately connected to the phase conductor under test, and the timing begins to read1minThe insulation resistance. The measurements are over. NowLThe end is disconnected from the measured phase, and then the megohm meter is stopped, and the measured phase winding is grounded and discharged. The other two-phase windings are measured in the same way.

       The measured rated voltage is380VThree phase asynchronous motor insulation resistance, can be used500VMegohm meter, insulation resistance value at room temperature is not less than0.5MΩ;Measuring high pressure6kVMotor insulation resistance when used2500VMegohm meter, at operating temperature, insulation resistance is not less than1MΩ/kV;The insulation resistance of the rotor winding is not less than0.5MΩ/kV. Rated voltage1kVAnd above the motor should be measured absorption ratio, absorption ratio should not be lower1.2.

       It should be noted that the effect of winding temperature on insulation resistance should be considered, and temperature conversion can be carried out if necessary;Three-phase asynchronous motorWhen the insulation resistance value of the winding fails to meet the requirements or there is no absorption phenomenon, the winding insulation should be judged according to the climatic conditions at the time of measurement whether it is possible to be damp. If the insulation is damp, it should be dried.

       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.