The ABB PSTX105-600-70 is a soft starter designed for three-phase AC motors. It provides a controlled start-up for motors by gradually increasing the voltage supplied to the motor, which helps to limit inrush currents, reduces mechanical stress, and improves the overall efficiency of motor-driven systems. The PSTX105-600-70 is equipped with advanced motor protection features, making it a versatile choice for a variety of industrial applications.