Fixed-mounted circuit breaker IEC 60947-2, frame size 1, 3-poles, In=630A up to 690V AC 50/60Hz, breaking capacity N Icu=55/42kA at 500/690V, Trip unit ETU300 LSI optimized for standard applica- tions, without display Protection LT, ST, INST, N-protection required an external N-sensor, incl. Trip alarm switch (1xCO), rear connection horizontal,