The C1042G100 is a MicroLogic 2.2 G electronic trip unit for the ComPacT NSX100...250 range, rated 100 A at 40 °C. It provides LSoI protection — long-time overload (L), short-time short-circuit with fixed delay (So), and instantaneous short-circuit (I) — tailored for generator applications. The 4-pole design handles 3D + N/2, 4D, or 3D neutral configurations.
The long-time pickup (Ir) is adjustable from 40 to 100 A in nine steps, so you dial in the generator's full-load amp rating, not a fixed value. Short-time pickup (Isd) adjusts from 1.5 to 9 x Ir, giving you selectivity headroom downstream. Instantaneous pickup (Ii) is fixed at 1500 A, which clears hard faults fast.
This is the trip unit only — it mounts into a ComPacT NSX100, NSX160, or NSX250 molded-case circuit breaker frame. The breaker itself is fixed-mount, 4-pole, with neutral on the left.
