Removable circuit breaker with sentinel trip unit 55kA 1000A 3P HW1M310DB

Withdrawable Circuit Breaker with Sentinel Trip Unit – 1000 A, 3P, 55 kA

This device is a high short-circuit capacity air circuit breaker designed for industrial and commercial installations where reliability and easy service access are required. Its withdrawable construction allows for safe and rapid module replacement without disconnecting network cables – significantly reducing service time and minimizing assembly errors.

The built-in Sentinel trip unit provides selective protection against overload and short circuits, with operation tailored to characteristic loads in circuits with motors or other devices featuring high inrush currents. A switching capacity of 55 kA at 400 V means the device can safely interrupt even very high short-circuit currents – without risk of damage or loss of functionality.

Each circuit breaker features four changeover auxiliary contacts, enabling integration with control systems, signaling, or building automation. There are no normally open contacts – meaning they are not intended for applications requiring disconnection of auxiliary circuits. The tripping indicator on the enclosure allows quick assessment of the device status without opening the housing.

Main circuit terminals are not fixed – they are connected via a separate enclosure part, facilitating installation in various switchboard configurations and allowing flexible adaptation to existing infrastructure. The device is not DIN-rail mounted – its installation requires a dedicated panel or cabinet with appropriate dimensions and mounting provisions.

The IP2X protection rating ensures that live parts cannot be touched by fingers, but it does not protect against dust or water – therefore, the device must be installed in enclosed housings. The rated voltage of 440–690 V makes it suitable for both 400 V systems and larger industrial installations.

An optional motor drive (not standard) enables remote opening/closing control – ideal for automation systems or remote monitoring. The absence of a built-in earth fault protection means such protection must be provided by other installation components.

It does not include integrated protection – its functions depend on the external Sentinel trip unit. This is not a "ready-to-use solution" but a withdrawable module designed to operate as part of a larger system.