OTM800E3CM24D ABB 800A 3-Pole Motorised Changeover Switch 24V DC

Why Choose the ABB OTM800E3CM24D Motorised Changeover Switch?

The ABB OTM800E3CM24D is a heavy-duty 800 A three-pole motorised changeover switch designed for controlled transfer between two electrical power sources. As part of the ABB OT motorised changeover switch range, it combines high-current switching performance with an integrated motor operator for remote source selection in demanding industrial and commercial electrical distribution systems.

The OTM800E3CM24D provides open-transition changeover operation, disconnecting the active source before the alternative source is connected. Its integrated 24 V DC motor operator enables remote electrical operation, while a direct-mounted handle provides manual switching capability when required.

With a rated current of 800 A, a three-pole configuration and an AC-23A operational power rating of 450 kW at 380–415 V, the OTM800E3CM24D is engineered for substantial three-phase power-transfer duties. Its robust electrical ratings make it suitable for mains/generator changeover, standby distribution and alternative supply selection systems.

Key Advantages

• Heavy-duty 800 A motorised changeover switching for high-current power distribution.
• Three-pole configuration designed for three-phase source-transfer applications.
• 24 V DC motor operator enables remote electrical source selection.
• Open-transition operation disconnects one source before connecting the alternative supply.
• 450 kW AC-23A operational power at 380–415 V.
• 20 kA RMS short-time withstand current for 1 s supports demanding distribution applications.
• Direct-mounted manual handle provides local operating capability.
• Base-mounted ABB OT construction supports integration into industrial switchboards and power distribution assemblies.

Key Features

• ABB OT motorised changeover switch range.
• 800 A rated current.
• 3-pole switching configuration.
• 24 V DC motor operating voltage.
• Open-transition changeover operation.
• 800 A AC-21A / AC-22A rated operational current at 380–690 V.
• 800 A AC-23A rated operational current at 380–690 V.
• 450 kW AC-23A operational power at 380–415 V.
• 720 A AC-31B rated operational current at 380–415 V.
• 650 A AC-33B rated operational current at 380–415 V.
• 1000 V rated operational and insulation voltage.
• 12 kV rated impulse withstand voltage.
• IP20 front protection.

Reliable Motorised Power Source Changeover

Motorised changeover switches such as the ABB OTM800E3CM24D provide a controlled method of transferring substantial electrical loads between two independent power sources. The open-transition switching arrangement disconnects the active source before connecting the alternative source, maintaining separation between the supplies during the transfer process.

The integrated 24 V DC motor operator enables remote switching from a suitable transfer-control or power-management system, while the direct-mounted handle provides local manual operating capability. Combined with its 800 A current rating, 450 kW AC-23A rating at 380–415 V and three-pole construction, the OTM800E3CM24D provides a robust solution for demanding three-phase source-transfer installations.

Typical Applications

• Mains and generator power source changeover systems.
• Standby and emergency power distribution.
• Industrial electrical switchboards.
• Commercial and infrastructure power distribution systems.
• Alternative electrical supply selection.
• High-current three-phase installations requiring remote motorised source transfer.