OTM100F4CMA24D ABB 100 A 4-Pole 24 V DC Motorised Change-Over Switch

Why Choose the ABB OTM100F4CMA24D Motorised Change-Over Switch?

The ABB OTM100F4CMA24D is a compact and reliable 100 A four-pole motorised change-over switch designed for controlled switching between two electrical power sources. As part of the ABB OT Change-over Switches product group, it combines an integrated motor operator with proven change-over switching technology for industrial, commercial and standby power distribution systems.

The OTM100F4CMA24D provides open-transition I-O-II operation, ensuring that one source is disconnected before the alternative source is connected. Its integrated 24 V DC motor drive enables remote electrical operation, while the direct-mounted handle also provides a practical means of manual operation when required.

With a rated operational current of 100 A for AC-21A and AC-22A duty and a four-pole configuration, the OTM100F4CMA24D is suitable for switching three-phase systems where the neutral conductor also needs to be switched. Its compact base-mounted construction supports straightforward installation inside switchboards, distribution panels and power control equipment.

Key Advantages

• Integrated motorised change-over switching for remote source selection.
• 100 A four-pole configuration for three-phase and switched-neutral applications.
• 24 V DC motor operating voltage for integration with control systems.
• Open-transition I-O-II operation disconnects one source before connecting the other.
• Supports both motorised and manual operation.
• 100 A AC-21A / AC-22A rating at voltages up to 690 V.
• Compact base-mounted construction for switchboard integration.
• Integrated motor drive simplifies the creation of remotely operated power transfer systems.

Key Features

• ABB OT Change-over Switches product group.
• 100 A rated operational current.
• 4-pole configuration.
• Integrated 24 V DC motor drive.
• I-O-II open-transition change-over operation.
• 100 A AC-21A and AC-22A rating at 380–415 V, 500 V and 690 V.
• 80 A AC-23A rating at 380–415 V.
• 37 kW AC-23A operational power rating 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 OTM100F4CMA24D allow electrical power sources to be selected remotely without requiring an operator to physically change the switch position during normal operation. The integrated motor mechanism operates the change-over switch while its open-transition design maintains a defined break between the two electrical sources.

The OTM100F4CMA24D combines motorised operation with a direct-mounted manual handle, providing flexibility for commissioning, maintenance and manual intervention. Its four-pole configuration simultaneously switches all four poles, including the fourth pole, making it suitable for power distribution arrangements where the neutral conductor must be transferred with the phase conductors.

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.