In the previous article, we said about the insulation resistance and absorption ratio of the measuring windings of the three-phase asynchronous motor. Today, Senli Motor Xiaobian will give you a simple understanding of the method steps and precautions for measuring the DC resistance of the windings.

       Before we begin, we need toThree-phase asynchronous motorPower off and take good safety measures, then open the junction box to remove the power cord, and connect the measuring wire or special wire to the end of the outgoing wire of the motor under test. Attention should be paid here to correctly connect the current pole and voltage pole wires, check the wiring is good, and then measure the DC resistance of the three-phase winding respectively, and record the measurement data in time. As well as winding temperature, ambient temperature, test date and instrument type.

       General rated voltage1kVAbove or rated power100 kWThe DC resistance of each phase winding of the above three-phase asynchronous motor should not exceed its minimum value2%When the neutral point is not drawn, the motor can measure the DC resistance between the lines, and the difference between them should not exceed the minimum value1%. The difference between each other should be compared with the historical measurement data, pay attention to the relative change, and carry out temperature conversion at the same time when the temperature is different.

       Three-phase asynchronous motor manufacturersRemind that when we measure the DC resistance of the winding, the winding temperature should be measured at the same time; The motor rotor should be kept in a stationary state during measurement. The bridge connection should be correct, the large motor winding has a certain inductance, and the measurement should be read after the galvanometer is stabilized.

       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.