withdrawable circuit breaker, with guide frame, IEC 60947-2, size 1, 4-pole, N pole on left, In=800 A up to 690 V AC 50/60 Hz, breaking capacity H Icu=100/66 kA at 500/690 V, ETU300 LSI electronic trip unit optimized for standard applications, without display, basic protection LT, ST, INST, including protection of the N conductor (internal neutral point sensor available) trip alarm switch (1 x CO), connection at rear horizontal guide frame with shutter, without position signaling switch