withdrawable circuit breaker with guide frame 4-pole, size I, IEC In=1600A to 690V, AC50/60Hz Icu=55kA at 500V rear connection vertical Overcurrent release ETU 27 LSING protection adjustable 0.4-1 in Ground fault/N protection integrated With manual operating mechanism with storage with electrical + mechanical request 50/60 Hz 230 V AC, 220 V DC With 1st auxiliary release Shunt release "F", F1 24 V DC; 100% ON period With 2nd auxiliary release "F", F2 Shunt release 24 V DC; 100% on-load factor 2NO+2NC S05= Castell/Fortress locking device in Off position Disconnector condition Safe Off/disconnector function