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abb Automatic transfer switch 125 amps with 3 Poles
ABB OTM125F3C21D400C automatic transfer switch with 125 A rating, 3 pole switching and 380–415 V AC motor operation for low-voltage power transfer systems.
£1,232.63
Why Choose the ABB OTM125F3C21D400C Automatic Transfer Switch?
The ABB OTM125F3C21D400C is a compact and reliable automatic transfer switch (ATS) designed for automatic power source changeover in industrial, commercial and standby power applications. As part of the ABB Compact ATS series, it provides dependable motor-operated transfer between two electrical sources to support continuity of supply in low-voltage systems.
The unit features an integrated motor operator, an open transition 1-0-2 switching mechanism and adjustable operating parameters, providing a practical all-in-one solution for mains-to-generator and dual-source power transfer applications.
With a rated current of 125 A, a 3-pole configuration and a 380–415 V AC motor operating voltage, the ABB OTM125F3C21D400C is suitable for three-phase low-voltage power distribution systems requiring reliable automatic transfer functionality.
Key Advantages
- Compact automatic transfer switch for critical power continuity.
- 125 A rated current capacity for low-voltage installations.
- 3-pole switching configuration for three-phase applications.
- Reliable integrated motorised automatic transfer operation.
- Open transition switching for safe source changeover.
- Suitable for generator backup and dual-source power systems.
Key Features
- ABB OTM Compact ATS series.
- Model: OTM125F3C21D400C.
- 125 A rated operational current.
- 3-pole automatic change-over switching.
- 380–415 V AC motor operating voltage.
- Automatic open transition 1-0-2 operation.
- Integrated motor drive and controller.
- Adjustable automatic transfer parameters.
- Compact design for switchboards and distribution panels.
Reliable Automatic Power Transfer for Standby Systems
Automatic transfer switches such as the ABB OTM125F3C21D400C monitor available power sources and transfer connected loads between normal and backup supplies when required. This helps maintain operation of essential electrical equipment during power interruptions.
The ABB Compact ATS range provides electrical engineers, contractors and panel builders with a compact solution for automatic source transfer, combining integrated motor operation, reliable switching performance and straightforward installation.
Typical Applications
- Automatic mains and generator backup systems.
- Industrial power distribution panels.
- Commercial buildings and facilities.
- Emergency and standby power systems.
- Electrical switchboards and control panels.
- Low-voltage automatic transfer installations.
Technical Specifications
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| Mounting Type | Base mounting | |
|---|---|---|
| Operation | Automatic | |
| Device Type | Automatic transfer switch | |
| Poles | 3-pole | |
| HS Code | 85365080 | |
| Country of Manufacture | China | |
| Manufacturer | ABB | |
| Series | OTM Compact ATS | |
| Model | OTM125F3C21D400C | |
| Manufacturer part number | 1SCA151420R1001 | |
| Product type | Automatic transfer switch | |
| Rated operational current | 125 A | |
| Number of poles | 3P | |
| Motor operating voltage | 380–415 V AC | |
| Rated operational voltage | 380–415 V AC | |
| Rated insulation voltage | 800 V AC | |
| Rated impulse withstand voltage | 8 kV | |
| Frequency | 50 / 60 Hz | |
| Rated short-time withstand current | 2.5 kA for 1 s | |
| Rated operational power AC-23A | 45 kW at 380–415 V | |
| Transition type | Open transition | |
| Controller type | 21D | |
| Mounting type | Base mounting / distribution board installation | |
| Protection rating | IP20 front protection | |
| Dimensions (H × W × D) | approx. 103 × 233 × 131 mm | |
| Weight | approx. 1.85 kg |
Frequently Asked Questions
What is the ABB OTM125F3C21D400C used for?
The ABB OTM125F3C21D400C 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 OTM125F3C21D400C supports a rated operational current of 125 A.
How many poles does the ABB OTM125F3C21D400C have?
The unit features a 3-pole switching configuration for three-phase applications.
What motor supply voltage is required?
The integrated motor operator requires a 380–415 V AC supply.
Where is this automatic transfer switch installed?
The ABB OTM125F3C21D400C is typically installed in switchboards, distribution panels and standby power 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 design and dependable power continuity.
