fixed-mounted circuit breaker, IEC 60947-2, size 1, 3-pole, In=4000 A, breaking capacity E, without internal voltage tap up to 1150 V AC 50/60 Hz, Icu=85/70 kA at 1000/1150 V, ETU300 LSI electronic trip unit optimized for standard applications, without display, basic protection LT, ST, INST, neutral conductor protection requires an external neutral point current sensor, trip alarm switch (1 x CO), connection at rear, horizontal at top, vertical at bottom