How to measure the insulation resistance of each phase winding of the motor?
Insulation measurement of motor winding to groundA. pull down all the wiring of the motor;B. check the quality of the ohmmeter, do open circuit and short circuit test;C. shake table no problem after turning the handle with the shaking table a probe connected to the motor shell, while another probe connected to a winding, when the reading is stable, the winding of the insulating value.
Measurement of motor insulation resistance is generally divided into three parts: motor winding to ground insulation measurement, motor winding phase insulation measurement and motor external winding layer (inter turn) insulation measurement.
Measurement of interphase insulation of motor windingsPhase insulation between the windings is insulated, the first one is connected in a winding, and then turn the table, measuring another winding and its resistance.
Insulation measurement of inter layer (turn to turn) of motor windingMeasuring the inter layer insulation of motor windings. Use the multimeter to determine whether there is an interlayer short circuit fault by comparing the DC resistance values of the three windings. When a group of values are significantly smaller after the measurement, it is suspected that there is a problem between the layers.
