A centrifugal pump requires 21.6 hp to flow 350 gpm at 2800 rpm with a 230/460V, 40 hp, 2-pole (3600 rpm) motor. The VFD available can operate up to a 25 hp motor at 230V, with a maximum output of 68 amps. Would this work, provided the pump flow requires no more than 25 hp? The VFD frequency would be limited to 48Hz to limit the motor speed.
This would be a temporary measure, pending a new 460V power supply and new 40 hp VFD.