The ATV630D15N4 is  inverter or converter; it is an AC drive, specifically a variable frequency drive (VFD), manufactured by Schneider Electric. Schneider Electric offers a wide range of AC drives under their Altivar series, and the ATV630D15N4 is one of the models in this series.

The ATV630D15N4 is designed to control the speed and torque of three-phase induction motors. It is typically used in industrial applications to optimize energy consumption and improve motor performance. The "ATV" in the model number stands for "Altivar," indicating that it is part of Schneider Electric's Altivar series of drives.

Here is some additional information about the ATV630D15N4:

- Power Rating: It has a power rating of 15 kW (approximately 20 horsepower).

- Voltage Rating: The drive operates at a voltage of 380-480V AC.

- Control Modes: It supports various control modes, including scalar control, sensorless vector control, and flux vector control.

- Communication Options: It provides multiple communication interfaces, such as Modbus, CANopen, EtherNet/IP, and others, allowing integration with automation systems.

- Safety Features: The drive includes built-in safety functions, such as safe torque off (STO) and safe limited speed (SLS), to ensure the safety of personnel and equipment.