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=1250A rotary coding switch Ir=500...1250A Isd=1...10xIn, Ii=1.5...15xIn N conductor protec. Adjustable opt. W. Ext. CT; up to 200% nut keeper kit No communication connection, no measurement function Motorized operating mechanism 220...250 V AC/DC incl. S21 spring energy store signaling switch With electr. And mech. Calling Switch-on solenoid (CC) 220-240 V AC/DC with 2nd auxiliary release UVR, instant Undervoltage 220-240 V AC/DC With 1st auxiliary release, ST Shunt release 220-240 V AC/DC