4-pole fixed mounting circuit breaker, size 1, IEC In=1000 A ... 690 V, AC 50/60Hz Icu=55kA with 500 V horizontal rear connections Overcurrent release ETU 25 LSI adjustable protection 0.4-1 in with manual operation with battery with mechanical closing without 1st auxiliary release with 2nd auxiliary release "F", F2 shunt trip AC 230V/DC 220V, 100%ED 2NO+2NC