Eliminates gearbox failure

The ABB motor-drive package for cooling towers comprises an ABB permanent magnet motor with an ABB industrial drive, ACS880. The ABB drive is used to establish an optimum speed set point and allows a trickle current to flow to the motor to prevent the fan from wind milling when not in operation. 

Together, the motor and drive combination delivers precise fan control without the need for a gearbox, even under low load or speed conditions often experienced in cooling tower applications.