This is a Compact NS1000N Circuit Breaker Base Frame, 1000A, 50kA at 415 VAC 50/60 Hz, 4 Poles . It is suitable for electrically operated withdrawable devices and is the optimal choice for all standard applications. This base frame is compatible with any trip unit, which must be ordered separately. It can be equipped with a wide range of optional features and accessories. The dimensions are 327mm (W) x 280mm (H) x 147mm (D). It ensures compliance with international standards (IEC 60947), CCC, EAC and marine specifications.