Delta VFD220CT43F00B is a constant torque inverter from the CT series, specifically designed for heavy-duty constant torque loads with three-phase 380–460V input and 22kW rated output power. It adopts advanced vector control technology that delivers strong overload capacity (200% for 3s, 180% for 10s, 150% for 60s) and stable torque output (150% rated torque at 0.1Hz) across the entire speed range (0.1–600Hz), making it suitable for applications such as belt conveyors, mixers, extruders, and machine tools that require consistent torque at all speeds. The inverter supports multiple control modes including torque control (±5% torque accuracy), speed control (±0.5% speed accuracy with encoder), and speed/torque switching, with configurable torque limit and speed limit parameters to protect mechanical systems from overload damage. It is equipped with a built-in brake unit (for rapid deceleration of high-inertia loads), rich I/O terminals (12 DI, 4 DO, 4 AI, 2 AO), and standard RS485 Modbus communication interface for seamless integration into industrial control systems. Comprehensive protection functions include overcurrent, overvoltage, undervoltage, overload, overheating, phase loss, ground fault, short circuit, motor thermal protection (PTC/NTC), and brake unit fault detection. With its rugged structural design (reinforced metal enclosure), high-efficiency cooling system (dual axial fans), and advanced fault diagnosis functions (real-time data logging of 100 fault records), this inverter ensures reliable and durable operation in heavy-duty constant torque applications in manufacturing, mining, and processing industries.