withdrawable non-automatic air circuit breakers with guide frame and PSS 4-pole, frame size 0, IEC N conductor on the left In=800A to 690V, 50/60Hz ac Icu=55kA at 415V Icu=50kA at 500V Icu=42kA at 690V without electronic trip units with rtc and 4Aux aux switches front, accessible, extended maine connection pieces