(1) before dismantling, we should use compressed air to clean the dust on the surface of the motor and wipe clean the surface dirt.
(2) select the working place of the disintegration of the motor and clean the environment.
(3) familiar with the structural features of the motor and the technical requirements for maintenance.
(4) prepare the tools for disintegration (including special tools) and equipment.
(5) in order to further understand the defects in the motor operation, a test can be done before dismantling. Therefore, the motor load test, a detailed examination of various parts of the motor temperature, sound, vibration, and the test voltage, current and speed, and then disconnect the load, a no-load test alone, measured the no-load current and no-load loss, record.
(6) cutting off the power supply, dismantling the external wiring of the motor and making a good record.
(7) a megabyte with suitable voltage is used to test the electrical insulation resistance of the motor. In order to compare with the measured insulation resistance value in the last maintenance, the motor insulation change trend and insulation condition should be judged. The insulation resistance measured at different temperatures should be converted to the same temperature, and generally converted to 75 C.
(8) test absorption ratio K. When the absorption ratio is greater than 1.33, it is indicated that the insulation of the motor is not dampened or dampened. In order to compare with previous data, it is also necessary to convert the absorption ratio measured at any temperature to the same temperature.