The Fuji Electric FRN0045G2S-4GU is a FRENIC-Eco series variable frequency drive rated for 30 hp continuous output at 44 A, fed from a three-phase 380-480 V AC supply (accepts +10%/-15% tolerance). It delivers a 0.1 to 120 Hz output range with 50% starting torque at 1 Hz, making it a solid fit for HVAC fan and pump applications where variable torque profiles are standard. The NEMA 1 enclosure (open type) means it is intended for indoor installation in a clean, dry environment — not for washdown or outdoor locations. The built-in heat sink handles the thermal load without an external fan kit for most duty cycles up to 44 A continuous.
Key Ratings and What They Mean for Fit
The 44 A maximum output current is the hard limit for continuous motor load. For a 30 hp, 460 V motor drawing roughly 40 A full-load, this drive leaves about 10% headroom — adequate for most variable-torque HVAC loads but not for constant-torque conveyors or high-overstart applications. The 50% starting torque at 1 Hz confirms it is vector-capable for low-speed holding, not just volts-per-hertz. Input voltage range of 380-480 V AC ±10% covers standard three-phase networks. The 50/60 Hz input frequency acceptance is universal. Protection coverage includes drive and motor thermal overload, overvoltage, undervoltage, phase failure, and phase-to-phase/phase-to-ground short circuit. No internal brake chopper is included, so if the load requires dynamic braking (overhauling fans, high-inertia centrifuges), an external braking resistor and chopper module must be added.