Maintenance Of Explosion-proof Motors

Explosion-proof motor maintenance work is indispensable when operating with supporting equipment, so what key points should be paid attention to when overhauling explosion-proof motors?
1. Before testing, the parts of the explosion-proof motor should be connected and some installation symbols should be made (the three-phase cables and outgoing wires are marked with yellow, green, and red insulating tapes respectively, the neutral point should be covered with black insulating tape, and the phase sequence of the explosion-proof motor should be Correspondingly calibrated according to the cable phase sequence, and the same color as the cable), so that the installation is accurate after repair. Small parts (such as screws, spring coils, gaskets, etc.) should be stored in small boxes. After the crash repair is completed, immediately Screw it in the original orientation to avoid dropping it.
 
2. The slip ring of the wound-type explosion-proof motor (structure of the wound-type asynchronous explosion-proof motor) should be wrapped with cardboard or asbestos cardboard during the maintenance period to avoid bumps when the rotor is drawn.
3. Measures should be taken when lifting the explosion-proof motor to avoid bumping the cable, and be careful not to bump the coil when removing the front and rear covers.
4. When pulling out the rotor, you should be extra careful and insist that the rotor be pulled out horizontally to avoid bumping the winding insulation.
Three-phase asynchronous motors should generally be equipped with fault protection devices, such as thermal protection devices, motor electronic protectors, etc., and the setting value of the protection device should be adjusted according to the motor nameplate current. If the motor load is relatively stable, in order to better protect the motor, the setting value of the protection device can be adjusted according to the actual working current of the motor.
5. When pulling out the rotor, the steel wire rope must not lean on, press the coil fan and other components to prevent damage to the wire and insulation.
6. When the rotor is drawn, both ends of the rotor should be supported and supervised to avoid bumping the coil, insulation, iron core, etc. Three-phase asynchronous motors should generally be equipped with fault protection devices, such as thermal protection devices, motor electronic protectors, etc., and the setting value of the protection device should be adjusted according to the motor nameplate current. If the motor load is relatively stable, in order to better protect the motor, the setting value of the protection device can be adjusted according to the actual working current of the motor.
7. The extracted rotor should be placed on a special bracket. If there is no special bracket, sleepers or rubber can be placed under the rotor. After the rotor is dropped, it should be placed securely and measures should be taken to avoid rolling.