withdrawable circuit breaker, with guide frame, IEC 60947-2, size 1, 3-pole, In=4000 A up to 690 V AC 50/60 Hz, breaking capacity S Icu=66/50 kA at 500/690 V, tripping unit ETU300 LSI 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, top horizontal, bottom vertical guide frame with shutter and position signaling switch (3 x CO),