PSE soft starter The efficient range Our PSE range is the perfect compromise between size and functionality. With torque control, it is the perfect option for smaller sized pump applications. Main benefits Keep your motor safe with built-in motor protections Fast and easy set-up with illuminated, language-neutral display Eliminate water hammering with torque control Reduce energy losses with built-in bypass. Main features Rated operational current: 18 to 370 A Operational voltage: 208–600 V AC Control supply voltage: 100–250 V AC.