Output frequency range and duty selection
Normal duty covers 0.00 to 600.00 Hz, which is the right band for high-speed spindles or centrifugal loads. Heavy duty tops out at 300.00 Hz, with the torque curve shaped for constant-torque applications like conveyors or extruders. The 200% torque limit (for up to 60 seconds, typical for this class) gives the headroom to clear a jammed load without tripping.
