Description Softstarter - ABB (PSTX) - PSTX1050-600-70 - Rated voltage 208-600Vac - Supply voltage (50/60Hz) 100-250V - Rated current 1050A - Rated power (380-400Vac) 560kW / (440-480Vac) 900HP - IP00 - RS485 PSTX1050-600-70