fixed-mounted circuit breaker 4-pole, size I, IEC In=1600A to 690V, AC50/60Hz Icu=66kA at 500V rear connection horizontal Overcurrent release ETU 25 LSI protection adjustable 0.4-1 in With manual operating mechanism with storage with mechanical request without 1st auxiliary release without 2nd auxiliary release 2NO+2NC N20= Retrofitted to connection: top vertical, bottom horizontal S05= Fortress locking device in Off position Disconnector condition Safe Off/disconnector function