ABB PSTX Soft Starter PSTX142-600-70 – Advanced Motor Softstarter

The ABB PSTX Soft Starter PSTX142-600-70 is a state-of-the-art electronic soft starter designed for motors up to 600V, providing smooth ramp-up and ramp-down to reduce mechanical wear and electrical peak currents. This advanced motor softstarter is rated for 142 A maximum continuous current, supporting three-phase motors up to approximately 75 HP at 600 VAC (60 HP @ 480 V). The PSTX142-600-70 operates on supply voltages from 208 V to 600 V AC and includes a wide-range 100–250 VAC control voltage input for its built-in control electronics. Key features include torque control and current limit start for precise motor acceleration, an integrated bypass contactor that closes at full voltage to minimize heat dissipation, and comprehensive motor protection functions including overload, phase loss, and stall protection. The soft starter provides controlled ramp-up and ramp-down of motor voltage with programmable ramp time from 1–120 seconds, significantly reducing inrush current and mechanical stress during startup. This minimizes voltage drops in the electrical system and extends motor and driven equipment life. The PSTX142 features a user-friendly interface with an LCD display and keypad for easy setup and programming, plus support for fieldbus communication modules including Modbus for network integration. The device offers built-in bypass and built-in motor overload relay functionality, eliminating the need for external components and reducing installation complexity. Housed in a rugged enclosure (270 mm W × 390 mm H × 186 mm D) for panel mounting with IP20 rating (or IP54 with additional kit), this soft starter is ideal for pumps, fans, compressors, and other motor-driven equipment where smooth starting and stopping are essential. The adaptive control feature can tailor the stop ramp to load type (e.g., pump stopping), and dual starting profiles ensure optimal performance for different applications. With its proven reliability and advanced features, the ABB PSTX142-600-70 delivers exceptional value for system integrators and OEMs seeking a high-quality soft starter solution for industrial motor control applications.