Drive selection memo for a 150 hp HVAC fan or pump
The Fuji FRN0217G2W-4GU is a FRENIC-Eco series variable frequency drive sized for a 150 hp motor on 380-480 VAC three-phase, delivering up to 203 A continuous output. That 203 A rating is the full load ampacity you spec against the motor nameplate — if your fan or pump draws 190 A FLA at 460 V, this drive carries it with headroom. Output frequency spans 0.1 to 120 Hz, which covers the V/Hz curve for a standard induction motor driving a centrifugal load. It's built for variable-torque HVAC duty — fans, blowers, centrifugal pumps — where the load torque rises with speed squared. The 50% starting torque at 1 Hz tells you it'll break a fan loose without a big inrush event, but this isn't a constant-torque conveyor or extruder drive. Programmable start/stop and remote contact control let a BAS or building controller call the shots.
What the ratings mean for a panel fit
NEMA 1 enclosure means it's for indoor, dry locations — no washdown, no outdoor weather. The open style with a bolt-on heat sink dumps the heat into the cabinet air, so you need to account for that 203 A worth of dissipation in your panel cooling. Overall it's 29-1/8 inches tall, 14 inches wide, 11-3/4 inches deep — plan the backplate real estate accordingly. No Ethernet port on this unit; control is via the keypad, remote contacts, and the analog/digital I/O. The LCD/LED display shows motor speed as a percent, output frequency, current, voltage, and alarm codes — enough for a field tech to see what the drive is doing without a laptop. Seven digital inputs and three analog inputs give you room for start/stop, speed reference, and feedback signals. Five digital and two analog outputs handle run status, fault relay, and speed follower signals back to the BMS.
Protection and compliance package
This drive carries its own protection suite: motor and drive thermal overload, overvoltage and undervoltage, phase failure, phase-to-phase and phase-to-ground short circuit, and overbraking detection. No brake chopper inside — if you need dynamic braking for overhauling loads, you add an external chopper and resistor. Standards listed are UL508C, CSA C22.2 No.14, and EN50178-1997 — it's accepted for North American and European industrial panels.