MotorThe insulation material resistance can be said to be the technical performance of the insulation (between the two-phase winding structure). The larger the insulation resistance value, the better.Frequency conversion speed motorA general term for motors driven by frequency converters.In fact, the motor designed for the frequency converter is a special frequency conversion motor. The motor can achieve different speeds and torques under the drive of the frequency converter to adapt to the changes in the demand of the load.Explosion-proof motorsA type of motor that can be used in flammable and explosive plants, and it does not generate sparks during operation.Explosion-proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries.In addition, it is also widely used in sectors such as textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, and medicine.The motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction.The phase-to-phase resistance we are talking about (the resistance of each phase winding through the wire) conductive network performance, the smaller the resistance value, the better.The greater the resistance value, the greater the heat generation and the greater the degree of loss.
1. Explosion-proof design motor companies usually produce 6 thread ends. First remove the link piece on one terminal at the same time, and then use a megohmmeter to clamp the 3 thread ends in the lower row of the terminal in turn, megohm The other end of the meter clamps the iron casing of the motor and quickly swings the megohmmeter. If the student's reading is above 500 (usually 200), then the motor control winding is good through the ground voltage insulation technology.
2. The megohmmeter measures the 3 wires in the lower row of the terminal in sequence when the terminal is connected to the terminal to obtain 3 sets of data. If we are all 500 (usually 200), then this motor There is no phase-to-phase breakdown, that is, it is good. If the company only needs 3 heads, then only measure the voltage insulation of the motor system to the ground, and the phase-to-phase insulation problem needs a multimeter.Note: The insulation material resistance and minimum life of the 380V explosion-proof design motor cannot be significantly lower than 0.5 megohm.
Measure insulation resistance 3. Be careful not to connect the wrong circuit, and keep the motor in a dry environment during measurement.If there is a problem with the insulation resistance measurement, please report it to the technician in time. The explosion-proof motor that needs to be replaced should be replaced and repaired in time to avoid unnecessary trouble.
Figure 4.After measuring the insulation resistance of the explosion-proof motor, it is necessary to record the measurement date and the name of the surveyor as the reference value for the next measurement.
