Fixed-mounted circuit breaker IEC 60947-2, frame size 1, 4-poles, N-pole left, In=1250A, breaking capacity E, up to 1000V AC 50/60Hz, Icu=85/50kA at 690/1000V, Trip unit ETU300 LSI optimized for standard applica- tions, without display Protection LT, ST, INST, include N-protection, (internal N-sensor available), incl. trip alarm switch (1xCO), rear connection horizontal,