withdrawable circuit breaker with guide frame 4-pole, size I, IEC In=1250A to 690V, AC50/60Hz Icu=55kA 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 without 1st auxiliary release without 2nd auxiliary release 4NO+4NC B08= Rated current reference module 800 A for ETU25, 27, 45, 55, 75, 76 for setting rated current in P23= Retrofitted to Connection: Top horizontal, bottom vertical R21= Shutter 2-part can be locked with bracket lock R55= Mutual mechanical interlock for switch with frame 2 m S05= Castell/Fortress locking device in Off position Disconnector condition Safe Off/disconnector function