fixed-mounted circuit breaker 4-pole, size II, IEC In=1600A to 690V, AC50/60Hz Icu=66kA at 500V rear connection horizontal Overcurrent release ETU45 LSIN protection adjustable 0.4-1 in with display and cubicle bus Opt.: Comm. /measuring func./ground fault/ ZSS With manual operating mechanism with storage with mechanical request without 1st auxiliary release With 2nd auxiliary release "F", F2 Shunt release 30 V DC, 100% on-load factor 2NO+2NC B12= Rated current reference module 1250 A for ETU25, 27, 45, 55, 75, 76 for setting rated current in N61= Cage spring connections for auxiliary S07= Castell/Fortress in Off position with 4 padlocks S30 = LOCKING DEVICE AGAINST OP. S33= Castell/Fortress Tension lever T40= Door sealing frame