fixed-mounted circuit breaker 4-pole, size II, IEC In=2500A to 690V, AC50/60Hz Icu=66kA at 500V rear connection horizontal Overcurrent release ETU 45 LSING protection adjustable 0.4-1 in with display and cubicle bus with ground fault protection Opt.: Comm./measuring func./ZSS With manual operating mechanism with storage with mechanical request without 1st auxiliary release without 2nd auxiliary release 2NO+2NC B20= Rated current reference module 2000 A for ETU25, 27, 45, 55, 75, 76 for setting rated current in F40= Sealing disc for ETU25-76 for protection against unauthorized operation S07= Castell/Fortress in Off position with 4 padlocks S30 = LOCKING DEVICE AGAINST OP. S33= Castell/Fortress Tension lever T40= Door sealing frame