fixed-mounted molded case circuit breaker frame 1600; with RTC and 4AUX trip alarm switch S24; Icu "M" Icu=55kA @ 415V, 3-pole ETU350, LSI, In=1600A rotary coding switch Ir=640...1600A Isd=1...10xIn, Ii=1.5...15xIn N conductor protec. adjustable opt. w. ext. CT; up to 200% rear horizontal connection No communication connection, no measurement function Motorized operating mechanism 24...30 V AC/DC incl. S21 spring energy store signaling switch With electr. and mech. calling Switch-on solenoid (CC) 24 V AC/DC without 2nd auxiliary release with 1st auxiliary release, ST Shunt release 24 V AC/DC K50= Ready indicator RTC auxiliary switch as version 24 V DC digital signal K51 Auxiliary current switch AUX 4 CO as version 24 V DC digital signal K53= Tripped signaling switch S24 as version 24 V DC digital signal S43= Interlock set for mechanical ON and/or OFF, padlock D=7 mm, on the operator panel S57= Pre-installed extension kit for external accessories Rear panel mounting (lateral shoulder modification) T30= Door sealing frame IP30 for fixed-mounted circuit breaker