fixed-mount non-aut. circuit-b. 4-pole, size I, IEC In=1250A to 690V, AC50/60Hz Icu=55kA at 500V rear connection vertical without overcurrent release Motorized/manual operating mechanism with spring charging motor 24-30 V DC Activation 24 V DC With 1st auxiliary release Shunt release "F", F1 24 V DC; 100% ON period without 2nd auxiliary release 4NO+4NC S05= Fortress locking device in Off position Disconnector condition Safe Off/disconnector function