Nidec Variable Frequency AC Drive / Servo Drive – Input Phase 3, Supply Voltage 380/480 V ac, 300hp Normal Duty, Output Current 417 A Normal Duty, IP 20 Rating, 50/60 Hz, Frequency Control, Open Loop Vector Control, Rotor Flux Control, Closed Loop Induction Motor Control, Permanent Magnet Motor Control, Regenerative Control, Servo Control, External Link Choke Required