The ATV630D55N4 is a model of the Schneider Electric ATV630 series of Variable Frequency Drives (VFDs) or inverters. 

Schneider Electric's ATV630 series is designed for controlling the speed and torque of three-phase induction motors. The ATV630D55N4 model specifically has a power rating of 55 kW, making it suitable for applications that require higher power output.

Some key features of the ATV630D55N4 model include:

1. Power Rating: 55 kW (approximately 75 horsepower).

2. Voltage Range: Suitable for a wide range of voltage levels, including 380-480 VAC.

3. Control Modes: It supports various control modes, including sensorless vector control, vector control with encoder feedback, and V/f (Volts per Hertz) control.

4. Communication Options: The drive has built-in communication capabilities like Modbus, CANopen, and Ethernet/IP, allowing integration into automation systems.

5. Integrated Safety Functions: The ATV630 series typically includes integrated safety functions such as Safe Torque Off (STO), which ensures the drive can be safely disabled during maintenance or emergency situations.

6. Advanced Motor Control Features: The drive offers advanced motor control algorithms and features, such as motor flux control, which enhances motor performance and energy efficiency.