Erie Press Systems Installs Unit at McInnes Rolled Rings
Significant energy savings are achieved in the new press through the use of variable-frequency drives on the eight 300-HP main motors. The design adjusts the motor speed to provide the required flow and then “turns off” a motor when pump flow is no longer required. This eliminates the energy wasted during idle periods, which is typically 30% of a motor’s full-load current. Additional benefits include reduced noise level over the cycle, reduced pump wear due to fewer rotations, reduction in cooling demand and use of fixed displacement pumps instead of servo pumps.