Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
abb Automatic transfer switch 125 amps with 4 Poles
ABB OTM125F4CB21D400C automatic transfer switch with 125 A rating, 4 pole switching and 380–415 V AC operation for standby power and distribution systems.
£1,549.63
Why Choose the ABB OTM125F4CB21D400C Automatic Transfer Switch?
The ABB OTM125F4CB21D400C is a compact and dependable automatic transfer switch (ATS) designed for automatic power source changeover in industrial, commercial and standby power applications. As part of the ABB OTM Compact ATS series, it provides reliable motor-operated transfer between two electrical sources to help maintain continuity of supply for critical systems.
This automatic transfer switch features a motor-operated open transition 1-0-2 switching mechanism with a self-supplied controller and adjustable operating parameters. Its compact construction makes it suitable for low-voltage switchboards, generator panels and distribution systems where dependable automatic source transfer is required.
With a rated current of 125 A, a 4-pole configuration and a 380–415 V AC operating voltage, the ABB OTM125F4CB21D400C is designed for three-phase power distribution systems requiring automatic mains-to-generator or dual-source transfer capability.
Key Advantages
- Compact automatic transfer switch for standby power applications.
- 125 A rated current capacity for low-voltage installations.
- 4-pole switching configuration including neutral switching.
- Reliable motor-operated automatic transfer functionality.
- Self-supplied controller with adjustable operating parameters.
- Compact design simplifies switchboard and panel installation.
Key Features
- ABB OTM Compact ATS series.
- Model: OTM125F4CB21D400C.
- 125 A rated operational current.
- 4-pole automatic change-over switching.
- 380–415 V AC operating voltage.
- Motor-operated open transition 1-0-2 switching.
- Controller type: 21D.
- Self-supplied automatic control unit.
- Adjustable transfer parameters for flexible operation.
- Suitable for mains and standby generator applications.
Reliable Automatic Power Transfer for Critical Systems
Automatic transfer switches such as the ABB OTM125F4CB21D400C monitor available power sources and automatically transfer connected loads between normal and backup supplies when required. This helps reduce downtime and maintain operation of essential electrical equipment.
The ABB OTM Compact ATS range provides electrical engineers, contractors and panel builders with a practical solution for automatic mains changeover, generator backup systems and industrial power distribution applications.
Typical Applications
- Automatic mains and generator transfer systems.
- Industrial power distribution panels.
- Commercial standby power installations.
- Electrical switchboards and control cabinets.
- Emergency power systems.
- Low-voltage automatic changeover applications.
Technical Specifications
Tick the specs you need, then view products that match.
| Mounting Type | Panel / door | |
|---|---|---|
| Operation | Automatic | |
| Device Type | Automatic transfer switch | |
| Poles | 4-pole | |
| HS Code | 85365080 | |
| Country of Manufacture | China | |
| Manufacturer | ABB | |
| Series | OTM Compact ATS | |
| Model | OTM125F4CB21D400C | |
| Manufacturer part number | 1SCA150574R1001 | |
| Product type | Automatic transfer switch | |
| Rated operational current | 125 A | |
| Number of poles | 4P | |
| Controller type | 21D | |
| Rated operational voltage | 380–415 V AC | |
| Motor operating voltage | 380–415 V AC | |
| Rated insulation voltage (Ui) | 800 V AC | |
| Rated impulse withstand voltage (Uimp) | 8 kV | |
| Frequency | 50 / 60 Hz | |
| Short-time withstand current | 2.5 kA for 1 s | |
| Transition type | Open transition | |
| Switching positions | 1-0-2 | |
| Mounting type | Panel / distribution board mounting | |
| Protection rating | IP20 front protection | |
| Dimensions (H × W × D) | approx. 103 × 286 × 131 mm | |
| Weight | approx. 2.35 kg |
Frequently Asked Questions
What is the ABB OTM125F4CB21D400C used for?
The ABB OTM125F4CB21D400C is an automatic transfer switch used to transfer electrical loads between two power sources such as mains supplies and generators.
What current rating does this transfer switch support?
The OTM125F4CB21D400C supports a rated operational current of 125 A.
How many poles does the ABB OTM125F4CB21D400C have?
The unit features a 4-pole switching configuration for three-phase systems with neutral switching.
What type of transfer operation does this ATS use?
The switch uses a motor-operated open transition 1-0-2 transfer mechanism with a self-supplied controller and adjustable parameters.
Where is this automatic transfer switch installed?
The ABB OTM125F4CB21D400C is typically installed in switchboards, generator panels and industrial or commercial power distribution systems.
Trusted for Standby Power Applications
ABB OTM Compact ATS automatic transfer switches are trusted by electrical engineers and installers for reliable source transfer, compact construction and dependable power continuity.
