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OTM125F3CMA230V ABB 125A 3-Pole Motorised Open-Transition Change-Over Switch
ABB OTM125F3CMA230V is a 125 A 3-pole motorised open-transition change-over switch with a 110–240 V AC/DC motor operator and manual operating handle for controlled source transfer in low-voltage distribution systems.
£793.60
Why Choose the ABB OTM125F3CMA230V Motorised Change-Over Switch?
The ABB OTM125F3CMA230V is a 125 A 3-pole motorised change-over switch designed for controlled transfer between two electrical power sources in low-voltage distribution systems. Part of the ABB OT change-over switch range, it combines an integrated motor drive with open-transition switching for industrial, commercial and infrastructure power distribution applications.
The OTM125F3CMA230V provides I-O-II open-transition operation, ensuring that one source is disconnected before the alternative source is connected. Its integrated motor operator accepts a 110–240 V AC/DC operating supply, supporting electrically controlled source transfer while retaining manual operating capability through the supplied handle.
Rated at 125 A with a 3-pole configuration, the OTM125F3CMA230V delivers AC-21A and AC-22A operational current ratings of 125 A at 380–415 V. ABB supplies the switch with a manual operating handle, terminal bolt kit with nuts and washers, and male connectors for the control circuits.
Key Advantages
- 125 A motorised change-over switch for controlled power source transfer.
- 3-pole configuration designed for three-phase electrical systems.
- I-O-II open-transition switching disconnects one source before connecting the alternative source.
- Integrated motor drive with 110–240 V AC/DC operating voltage.
- Manual operating handle included for local operation when required.
- Supplied with terminal bolt hardware and male connectors for control circuits.
Key Features
- ABB OTM motorised change-over switch.
- 125 A rated current.
- 3-pole configuration.
- I-O-II motorised operation.
- Open-transition switching.
- 110–240 V AC/DC motor operating voltage.
- 125 A AC-21A and AC-22A rating at 380–415 V.
- 90 A AC-23A rating at 380–415 V.
- 45 kW AC-23A operational power at 380–415 V.
- Integrated motor drive with manual operating capability.
Reliable Motorised Open-Transition Power Source Change-Over
Motorised change-over switches enable electrical power sources to be selected through an integrated motor operator, supporting remotely controlled source-transfer arrangements. The ABB OTM125F3CMA230V combines I-O-II operation with an open-transition mechanism, providing a defined disconnection stage before the alternative source is connected.
The OTM125F3CMA230V combines a 125 A rating, three-pole construction and a 110–240 V AC/DC motor operating range. Manual operation remains available through the supplied handle, making the unit a versatile choice for industrial and commercial low-voltage source-transfer systems.
Typical Applications
- Motorised mains and alternative power source selection.
- Generator and mains change-over systems.
- Industrial low-voltage distribution switchboards.
- Commercial building power distribution.
- Remote three-phase source-transfer systems.
- Infrastructure and manufacturing electrical installations.
Technical Specifications
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| Mounting Type | Base mounting | |
|---|---|---|
| Device Type | Motorised changeover switch | |
| Operation | Motorised | |
| Series | OT Change-Over Switches | |
| ABB order code | 1SCA120070R1001 | |
| Product type | Motorised change-over switch | |
| Rated current | 125 A | |
| Number of poles | 3 | |
| Operation | Motorised with manual operating capability | |
| Switch positions | I-O-II | |
| Transition type | Open transition | |
| Motor operating voltage | 110–240 V AC/DC | |
| Rated operational voltage | 800 V | |
| Rated insulation voltage | 800 V | |
| Rated impulse withstand voltage | 8 kV | |
| AC-21A rated operational current at 380–415 V | 125 A | |
| AC-21A rated operational current at 500 V | 125 A | |
| AC-21A rated operational current at 690 V | 125 A | |
| AC-22A rated operational current at 380–415 V | 125 A | |
| AC-22A rated operational current at 500 V | 125 A | |
| AC-22A rated operational current at 690 V | 125 A | |
| AC-23A rated operational current at 380–415 V | 90 A | |
| AC-23A rated operational current at 500 V | 70 A | |
| AC-23A rated operational current at 690 V | 50 A | |
| AC-31B rated operational current at 380–415 V | 125 A | |
| AC-33B rated operational current at 380–415 V | 80 A | |
| AC-23A rated operational power at 380–415 V | 45 kW | |
| AC-23A rated operational power at 500 V | 45 kW | |
| AC-23A rated operational power at 690 V | 45 kW | |
| Rated short-time withstand current | 2.5 kA RMS for 1 s | |
| Operating mechanism | Mechanism at end of switch | |
| Operating mode | Front operated | |
| Mounting type | Base mounting | |
| Terminal type | Screw terminals | |
| Cable cross-section | 10–70 mm² | |
| Tightening torque | 6 N·m | |
| Power loss | 6.3 W per pole | |
| Front degree of protection | IP20 | |
| Manual operating handle | Included | |
| Terminal bolt kit | Included | |
| Control-circuit male connectors | Included | |
| Product dimensions (W × H × D) | 230 × 100 × 116 mm | |
| Net weight | 1.64 kg | |
| EAN | 6417019516813 |
Frequently Asked Questions
What is the ABB OTM125F3CMA230V used for?
The ABB OTM125F3CMA230V is a 125 A 3-pole motorised change-over switch used for controlled transfer between two electrical power sources in low-voltage distribution systems.
What is the rated current of the OTM125F3CMA230V?
The OTM125F3CMA230V has a rated current of 125 A, with AC-21A and AC-22A operational current ratings of 125 A at 380–415 V.
What motor operating voltage does the OTM125F3CMA230V use?
The integrated motor operator is rated for an operating voltage range of 110–240 V AC/DC.
What type of transition does the ABB OTM125F3CMA230V use?
The OTM125F3CMA230V uses open-transition switching, meaning one electrical source is disconnected before the alternative source is connected.
Can the ABB OTM125F3CMA230V be operated manually?
Yes. ABB supplies the OTM125F3CMA230V with a handle for manual operation, alongside the integrated motor drive.
Trusted by Electrical Professionals Worldwide
ABB OT motorised change-over switches are designed for industrial and commercial electrical distribution systems requiring dependable source transfer, integrated motor operation and robust low-voltage switching performance.
