The VFD022EL21A is a model of Delta VFD (Variable Frequency Drive) inverter. It is designed to control the speed and torque of three-phase induction motors. Here are some key specifications and features of the VFD022EL21A:

1. Power Rating: The VFD022EL21A has a power rating of 2.2 kilowatts (kW), which means it is capable of driving motors up to 2.2 kW.

2. Voltage Rating: The input voltage range for the VFD022EL21A is typically 200-240 volts AC, with a single-phase or three-phase power supply.

3. Control Method: This inverter supports several control methods, including V/F (Voltage/Frequency) control, sensorless vector control, and PID control. These control methods allow for precise control of motor speed, torque, and other performance parameters.

4. Protection Features: The VFD022EL21A includes various protective features to ensure the safety and reliability of the motor and the inverter itself. Some common protection functions include overcurrent protection, overvoltage protection, undervoltage protection, and overload protection.

5. Communication and Expansion Options: The VFD022EL21A provides multiple communication interfaces, such as RS-485 Modbus communication, allowing for easy integration with other automation systems. Additionally, it supports expansion cards for additional functionality and connectivity options.

6. Programming and Monitoring: The VFD022EL21A can be programmed and monitored using the built-in control panel, or through external devices such as a PC or HMI (Human Machine Interface). Delta provides software tools for parameter configuration, monitoring, and troubleshooting.

7. Application Areas: The VFD022EL21A is suitable for various applications, including pumps, fans, conveyors, and other industrial machinery that require speed control for three-phase induction motors.