withdrawable circuit breaker, without guide frame, IEC 60947-2, size 1, 3-pole, In=1250 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, neutral conductor protection requires an external neutral point current sensor, trip alarm switch (1 x CO),