What this trip unit does
The C1642B160 is a MicroLogic 2.2 AB electronic trip unit rated 160 A at 40 °C, designed for the ComPacT NSX160/250 range. It provides LSoI protection — long-time overload (L), short-time short-circuit with fixed delay (So), and instantaneous short-circuit (I) — with adjustable long-time pickup from 90 to 160 A and short-time pickup from 1.5 to 10 x Ir. Fixed instantaneous pickup is set at 1600 A.
Rated operational voltage is 690 V AC 50/60 Hz, so it works in standard 400 V and 480 V distribution panels without derating.
Deployment context
This trip unit mounts into a ComPacT NSX160 or NSX250 circuit breaker — fixed-mount, 4-pole, neutral left. The electronic trip technology gives you adjustable curves and a flashing green LED for ready status, plus red/orange LEDs at 105% and 90% Ir to flag overload conditions without opening the panel.
