fixed-mounted molded case circuit breaker w. handle frame 1600; 4AUX and trip alarm switch S24; Icu "M" Icu=55kA @ 415V, 3-pole ETU350, LSI, In=800A rotary coding switch Ir=320...800A 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 Without additional alarm switch assembly With mechanical calling without 2nd auxiliary release without 1st auxiliary release K52= Auxiliary current switch AUX 2 CO + 2 CO Variant 2x 400 V AC + 2x 24 V DC S57= Pre-installed extension kit for external accessories Rear panel mounting (lateral shoulder modification)