Stationary circuit breaker with Sentinel trip unit, 42 kA, 1600 A, 4P HW1N416FB

Stationary circuit breaker with Sentinel trip unit, 42 kA, 1600 A, 4P

This device is a fixed, air‑type circuit breaker intended for protecting industrial and commercial installations with high rated currents. It is designed as a central element in low‑voltage switchgear, where reliable short‑circuit and overload protection under high loads is required.

It has four poles and is equipped with a Sentinel trip unit — a mechanism that responds to circuit abnormalities such as current flow outside the safe range. It does not include built‑in earth‑fault protection — this protection must be provided by other installation components.

The rated making capacity at 400 V is 42 kA — meaning the device can safely interrupt the circuit even during an extremely high short‑circuit. It can operate at voltages from 440 to 690 V, making it suitable for both 400 V systems and higher industrial voltages.

The main connections are designed for busbar mounting — cables cannot be attached directly to terminals. This solution simplifies integration with distribution busbars and reduces the number of connection points, increasing stability and lowering the risk of overheating.

The device is not DIN‑rail mounted. It is fixed‑mounted — requiring special installation in a switchgear cabinet, often using a frame or base. It also lacks an internal motor drive, but supports an optional drive — allowing remote control or process automation.

It has four auxiliary changeover contacts — they can be used for status indication (on/off) or to control other circuits. It does not have normally open or normally closed contacts — thus it is not intended for additional load switching.

It features a trip indicator: a visible mechanical signal shows the device’s status without opening the enclosure. The IP2X protection rating provides basic protection against accidental contact with live parts — but does not protect against dust or water.

It is supplied without a protective device — it must be used together with an appropriate trip unit (e.g., Sentinel), which is already part of the assembly. It lacks automatic re‑close functionality and over‑voltage protection.

In practice: the installer mounts it in a cabinet as the main circuit breaker, connects the incoming and outgoing busbars, and then configures the auxiliary contacts for signaling or control. The end user uses it as a safety point — manually opening it during maintenance or fault conditions. The 42 kA rating allows it to be used even in locations with high short‑circuit potential — e.g., in industrial power distribution substations.