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 45 LSING protection adjustable 0.4-1 in with cubicle bus and Ground fault protection Opt.: Comm./measuring func./ZSS With manual operating mechanism with storage with mechanical request With 1st auxiliary release Shunt release "F", F1 30 V DC, 100% ON period without 2nd auxiliary release 2NO+2NC F23= Internal current transformers 4-pole switch BGI R21= Shutter 2-part can be locked with bracket lock S05= Castell/Fortress locking device in Off position Disconnector condition Safe Off/disconnector function T40= Door sealing frame