OTM400E3CM24D ABB 400 A 3-Pole Motorised Changeover Switch 24 V DC

Why Choose the ABB OTM400E3CM24D Motorised Changeover Switch?

The ABB OTM400E3CM24D is a heavy-duty motorised changeover switch designed for reliable transfer between alternative electrical power sources in industrial and commercial low-voltage distribution systems. Part of the ABB OT motorised changeover switch range, it combines a 400 A current rating with electrically operated source switching for demanding three-phase applications.

This three-pole switch provides open-transition changeover operation, ensuring one source is disconnected before the alternative source is connected. Its integrated motor operator enables remote electrical switching, while the supplied handle provides manual operating capability when local control is required.

With a rated current of 400 A, a 3-pole configuration and a 24 V DC motor operating voltage, the OTM400E3CM24D is suitable for mains and standby power systems, generator changeover installations and industrial distribution switchboards. Its 275 kVA rating at 400 V provides substantial switching capacity for three-phase power distribution applications.

Key Advantages

• Heavy-duty motorised changeover switching for controlled power-source transfer.
• 400 A rated current for demanding industrial and commercial applications.
• 3-pole configuration for three-phase source changeover.
• 24 V DC motor operating voltage for integration with low-voltage DC control systems.
• Open-transition operation disconnects one source before connecting the alternative supply.
• Integrated motor drive supports remote electrical source selection.
• Manual operating handle and terminal hardware supplied for practical switchboard installation.

Key Features

• ABB OT motorised changeover switch range.
• 400 A rated current.
• 3-pole switching configuration.
• 24 V DC motor operating voltage.
• 275 kVA rated power at 400 V.
• 400 / 400 A AC-31B / AC-33B rated current at 415 V.
• Motorised open-transition source switching.
• Manual operating capability with supplied handle.
• OTV400ECMK operating handle supplied as standard.
• M10 × 30 mm terminal bolt kit supplied as standard.

Reliable Motorised Power Changeover

Motorised changeover switches allow electrical loads to be transferred between alternative power sources through remote electrical control rather than requiring routine manual switching at the switchboard. The ABB OTM400E3CM24D combines an integrated 24 V DC motor drive with open-transition switching for controlled source selection in three-phase low-voltage distribution systems.

ABB supplies the OTM400E3CM24D with a handle for manual operation, a bolt kit with nuts and washers for all terminals and male connectors for the control circuits. This combination supports convenient integration into switchboards, generator transfer systems and other power distribution assemblies requiring dependable motorised source switching.

Typical Applications

• Main and standby power supply changeover systems.
• Generator and mains supply switching installations.
• Industrial low-voltage distribution switchboards.
• Commercial building electrical distribution systems.
• Manufacturing and process plant power systems.
• Remote source-selection and transfer systems.
• Three-phase installations using 24 V DC control circuits.