PSTX soft starter The advanced range The PSTX combines many years of research and product development with extensive knowledge of application specific requirements and needs. The PSTX is our latest advancement in motor control and protection and adds new functionality with increased reliability to any motor starting application. Main benefits Secure motor reliability Improve installation efficiency Increase application productivity. Main features Three-phase controlled Operational voltage: 208-690 V AC Wide rated control supply voltage: 100-250 V, 50/60 Hz Rated operational current: 30…1250 A (inside delta: 2160 A) Coated circuit boards Torque control for excellent control of pumps.