Power switch with motor drive 1250A HIB491M

Power switch with built‑in motor drive, 1250 A, 4 poles

This device is not a simple disconnect – it is a dual‑source switching system designed for load‑bearing operation with automatic control. The built‑in motor drive enables remote switching between the mains and a generator without physical access to the panel. It operates in the modes: I (source 1) – 0 (off) – II (source 2), with clear visual position indication.

It has a fixed construction – permanently mounted in distribution boards, with no front‑mount or intermediate mounting options. It provides short‑circuit and overload protection, but it is not an emergency stop device (NOT-AUS). Its primary function is safe, controlled switching – e.g., during a power failure or planned power shutdown.

For the installer: operation and mounting

• Cable clamps – allow direct connection of conductors without the need for DIN rails. This is a simpler and more robust solution for high currents.

• Locking mechanism – enables physical locking of the device in the selected position, e.g., during service work. An extension with a lock can be added.

• One normally‑closed auxiliary contact – provides a signal of the switch’s current position to automation or monitoring panels. There are no make‑or‑break contacts, so no extra wiring is required.

• IP00 front – the front is unprotected, so installation requires an appropriate enclosure. Do not use it in open spaces.

• Installation only in distribution boards – it cannot be mounted on a wall or floor as a standalone unit. It must be housed in a suitably designed enclosure.

For the end user: practical implications

• If you have a backup generator, this switch will automatically transfer the load to it when the mains voltage is lost, with no delay and no manual intervention.

• It switches under load up to 1250 A – suitable for large installations such as production halls, data centres, ventilation systems, or heat‑pump plants.

• It withstands short‑circuit currents up to 100 kA (Iq) and short‑time currents up to 64 kA (Icw), meaning it will not be damaged even in a severe network fault.

• Rated load power is 450 kW for AC-3 (motors) and up to 562 kW for AC-23 (mixed loads) – making it suitable for controlling large pumps or compressors.

• It has no voltage release – it does not react to voltage drops or surges. Its sole purpose is to switch between two power sources, not to provide protection.

There are no “magical” functions here. This is a tool for professionals: robust, straightforward to operate, and designed to last for years without maintenance. Installation requires knowledge of IEC 60947-3 and IEC 60947-6-1 standards – but if you are experienced with industrial distribution panels, this switch will perform as reliably as its locking mechanism.