OTM125F4CMA230V ABB 125 A 4-Pole 230 V Motorised Change-Over Switch

Why Choose the ABB OTM125F4CMA230V Motorised Change-Over Switch?

The ABB OTM125F4CMA230V is a compact and reliable 125 A four-pole motorised change-over switch designed for controlled switching between two electrical power sources in industrial, commercial and standby power distribution systems. As part of the ABB OT Change-over Switches product group, it combines proven change-over switching technology with an integrated motor operator for convenient remote source selection.

The OTM125F4CMA230V provides open-transition change-over operation, ensuring that one source is disconnected before the alternative source is connected. Its motor operator accepts a 110–240 V AC/DC operating supply, including 230 V AC applications, while a direct-mounted handle provides manual operation when required.

With a rated operational current of 125 A for AC-21A and AC-22A duty and a four-pole configuration, the OTM125F4CMA230V is suitable for power distribution systems where four conductors need to be switched simultaneously. Its compact base-mounted construction supports straightforward integration into switchboards, distribution panels and power control equipment.

Key Advantages

• Integrated motorised change-over switching for remote power source selection.
• 125 A four-pole configuration for simultaneous switching of four conductors.
• Motor operator accepts 110–240 V AC/DC, including 230 V AC control supplies.
• Open-transition switching disconnects one source before connecting the alternative source.
• Supports both motorised and manual operation.
• 125 A AC-21A / AC-22A rating at voltages up to 690 V.
• Compact base-mounted construction for switchboard integration.
• Supplied with manual operating handle and connection hardware.

Key Features

• ABB OT Change-over Switches product group.
• 125 A rated operational current.
• 4-pole configuration.
• Integrated 110–240 V AC/DC motor operator.
• Open-transition change-over operation.
• 125 A AC-21A and AC-22A rating at 380–415 V, 500 V and 690 V.
• 90 A AC-23A rating at 380–415 V.
• 45 kW AC-23A operational power at 380–415 V.
• 800 V rated operational and insulation voltage.
• 8 kV rated impulse withstand voltage.
• 2.5 kA rms short-time withstand current for 1 s.
• Direct-mounted black handle for manual operation.
• Compact front-operated, base-mounted design.

Reliable Motorised Power Source Change-Over

Motorised change-over switches such as the ABB OTM125F4CMA230V enable electrical power sources to be selected remotely, reducing the need for routine manual switching at the electrical panel. The integrated motor mechanism operates the change-over switch while its open-transition design maintains a defined break between the two electrical sources during transfer.

The OTM125F4CMA230V combines motorised operation with a direct-mounted manual handle, providing flexibility during commissioning, maintenance and manual intervention. Its four-pole configuration switches the fourth pole simultaneously with the other poles, making it suitable for power distribution arrangements requiring four conductors to be transferred together.

Typical Applications

• Motorised mains-to-generator change-over systems.
• Standby and alternative power supply switching.
• Industrial electrical distribution systems.
• Commercial building power distribution.
• Switchboards and electrical distribution panels.
• Remote source-selection and power transfer systems.