withdrawable circuit breaker with guide frame 4-pole, size I, IEC In=1250A to 690V, AC50/60Hz Icu=66kA at 500V rear connection horizontal Overcurrent release ETU 27 LSING protection adjustable 0.4-1 in Ground fault/N protection integrated With manual operating mechanism with storage with mechanical request With 1st auxiliary release Shunt release "F", F1 50/60 Hz 230 V AC/220 V DC, 100% on-load factor With 2nd auxiliary release "R", F3 Undervoltage, instant. 208-240 V AC, 220-250 V DC 2NO+2NC B08= Rated current reference module 800 A for ETU25, 27, 45, 55, 75, 76 for setting rated current in K07= Tripped signaling contact, 1 CO not possible with option F02 P23= Retrofitted to Connection: Top horizontal, bottom vertical R21= Shutter 2-part can be locked with bracket lock S05= Castell/Fortress locking device in Off position Disconnector condition Safe Off/disconnector function