We are currently operating a 1655GPM slurry pump at 706rpm with 75' of head. A GE AC2000 drive runs the 400hp 460v motor at about 130A (30%). We are looking into removing the reducer and direct-coupling a 150hp motor to run more efficiently (estimated 10% increase just in the motor, not sure...
Thank you for your help. I have only been with the company for 4 months and these motors have proved themselves to be quite a challenge. I think we need a visit from a proven technical expert that is highly knowledgeable about wound-rotor induction motors and liquid rheostats. Does anyone...
Thanks for the advice - we will change our PM procedure to more thoroughly clean the brushes and holders. We had been pulling on the brush wire to be sure each one was free, and we blew the area out with an air lance but maybe that wasn't enough. We check our liquid rheostat concentration once...
Hi,
We operate ball mills with dual-coupled 3500hp 4160v wound rotor induction motors. We have recently experienced frequent arcing of the slip rings which seems to start on the center ring. The arcing damages the ring badly which requires us to shutdown the mill to sand it smooth again. The...
