The Mitsubishi FR-E520S-1.5K-EC is a variable frequency drive (VFD) inverter manufactured by Mitsubishi Electric. It is designed for controlling the speed of three-phase induction motors in various industrial applications. The "1.5K" in the model number refers to the power rating of the inverter, which is 1.5 kilowatts. The "EC" indicates that it is an energy-saving model.

The FR-E520S series inverters offer advanced motor control features, such as sensorless vector control and auto-tuning. They also have built-in protections and safety features to ensure reliable operation and motor protection. The inverter supports various control modes, including speed control, torque control, and position control.

The FR-E520S series is known for its compact design, ease of use, and versatility. It is often used in applications such as fans, pumps, conveyors, and other machinery that requires precise control of motor speed and torque.