Delta VFD750CP43B-21 is a high-reliability fan and pump dedicated inverter from the CP2000 series, powered by three-phase 380–460V with 75kW rated output power. It adopts optimized energy-saving control strategy suitable for fans and pumps, which can effectively reduce energy consumption while maintaining stable system operation (120% overload capacity for 60s). The inverter has a built-in high-precision PID adjustment function to realize automatic control of pressure, flow or temperature, and supports multi-pump coordinated control (master-slave logic) and various intelligent protection functions (dry-running prevention, anti-block protection). It provides complete protection measures including overcurrent, overvoltage, overload, phase loss, overheat, and motor thermal protection to ensure the safe operation of the motor and the inverter. With robust structure (reinforced metal enclosure), high-efficiency heat dissipation system (temperature-controlled fans), and strong anti-interference performance (surge protection up to 2kV), this model ensures stable and reliable operation in long-term continuous working conditions (ambient temperature 0–50°C), and is widely applied in large HVAC systems, water supply and drainage systems, and industrial ventilation equipment in commercial buildings and industrial plants.