A Louisville customer recently brought in a 60 hp integral vertical motor pump assembly where the motor was water-cooled. The circulation tubes running through the stator had clogged with lime buildup causing the motor to overheat which resulted in the motor windings being burned to a crisp. The customer came in to witness the teardown and to discuss options to prevent future unplanned downtime, as this had happened numerous times before. As it turns out the customer has four of these same pumps in remote locations without monitoring devices so there’s no way for them to tell when the water stops [...]
Maintaining the Cleanliness of the Exterior of the Motor, the Fan and the Fan Cover Grill/Screen is Critical to Getting the Most Life Out of Your Motors.
Keeping the exterior of motor frames free of debris and buildup is necessary to achieve the normal lifespan of the winding. On a TEFC motor, the fins on exterior of motor are made to direct the air flow over the motor frame for heat dissipation. When they become restricted or filled with foreign material, it may cause the motor to run at an elevated temperature creating a thermal deterioration of the winding insulation. For every 10 degrees C that you increase the temperature of the motor, it cuts the insulation life in half. Of course the air will originate with the [...]