The VFD450CP43S-21 is a model of Delta inverter. Delta Electronics is a company that specializes in power and thermal management solutions, including industrial automation products such as inverters The VFD450CP43S-21 is specifically a variable frequency drive (VFD) designed for controlling the speed and torque of an electric motor.

Here are some specifications and features of the Delta VFD450CP43S-21 inverter:

- Power rating: 450 kW

- Input voltage: 3-phase, 380-480 VAC

- Output voltage: 3-phase, 0-480 VAC

- Support for various motor types, including induction motors and permanent magnet motors

- Built-in PID control for closed-loop applications

- Programmable digital and analog I/O for flexible control options

- Communication interfaces for integration with external systems, such as Modbus and Ethernet

- Multiple protection features to ensure safe operation, including overload protection, overvoltage protection, and short circuit protection

- Compact design for space-saving installation

- User-friendly interface with a keypad and display for easy parameter configuration and monitoring