This Is A Compact Ns1250N Circuit Breaker Basic Frame, 1250A, 50Ka At 415 Vac 50/60 Hz, 3 Poles . It Is Adapted For Fixed Devices Electrically Operated, And It Is An Optimum Choice For All Standard Applications. This Basic Frame Is Compatible With Any Type Of Trip Unit Which Has To Be Ordered Separately. It Can Be Equipped With A Variety Of Optional Functions And Accessories. The Dimensions Are 327Mm (W) X 210Mm (H) X 147Mm (D). It Ensures Compliance With International Standards (Iec 60947), Ccc, Eac And Marine Specifications.