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abb Automatic transfer switch 125 amps with 4 Poles
ABB OTM125F4C21D400C automatic transfer switch with 125 A rating, 4 pole switching and 380–415 V AC motor operation for standby power and distribution systems.
£1,396.51
Why Choose the ABB OTM125F4C21D400C Automatic Transfer Switch?
The ABB OTM125F4C21D400C is a compact and intelligent automatic transfer switch (ATS) designed for reliable source switching in industrial, commercial and standby power systems. As part of the ABB OTM Compact ATS series, this motor-operated transfer switch automatically changes between primary and backup power sources to help maintain continuity of electrical supply.
The unit features a motor-operated open transition 1-0-2 switching mechanism with a self-supplied controller and adjustable operating parameters. Its compact design makes it suitable for low-voltage switchboards, generator systems and distribution panels where dependable automatic power transfer is required.
With a rated operational current of 125 A, a 4-pole configuration and a 380–415 V AC operating voltage, the ABB OTM125F4C21D400C is suitable for three-phase power distribution systems requiring reliable automatic source transfer and neutral switching capability.
Key Advantages
- Compact automatic transfer switch for standby power applications.
- 125 A rated current capacity for low-voltage power systems.
- 4-pole switching configuration including neutral switching.
- Reliable motor-operated automatic source transfer.
- Self-supplied controller with adjustable operating parameters.
- Compact footprint for space-saving switchboard installation.
Key Features
- ABB OTM Compact ATS series.
- Model: OTM125F4C21D400C.
- 125 A rated operational current.
- 4-pole automatic transfer switching.
- 380–415 V AC motor operating voltage.
- Motor-operated open transition 1-0-2 switching.
- Controller type: 21D.
- Integrated motor drive and automatic control.
- Adjustable transfer parameters for flexible system configuration.
- Suitable for mains-to-generator transfer applications.
Reliable Automatic Power Transfer for Critical Installations
Automatic transfer switches such as the ABB OTM125F4C21D400C monitor available power sources and automatically transfer connected loads between normal and standby supplies during power interruptions. This helps maintain operation of essential electrical equipment and reduces downtime.
The ABB OTM Compact ATS range provides electrical engineers, contractors and panel builders with a dependable solution for automatic mains changeover, generator backup 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
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| Mounting Type | Base mounting | |
|---|---|---|
| Operation | Automatic | |
| Device Type | Automatic transfer switch | |
| Poles | 4-pole | |
| HS Code | 85365080 | |
| Country of Manufacture | China | |
| Manufacturer | ABB | |
| Series | OTM Compact ATS | |
| Model | OTM125F4C21D400C | |
| Manufacturer part number | 1SCA151251R1001 | |
| 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 | 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 current AC-21A | 125 A | |
| Rated operational current AC-22A | 125 A | |
| Rated operational current AC-23A | 90 A | |
| Rated operational power AC-23A | 45 kW at 380–415 V | |
| Transition type | Open transition | |
| Mounting type | Base mounting / distribution board installation | |
| Terminal type | Screw connection | |
| Protection rating | IP20 front protection | |
| Dimensions (H × W × D) | approx. 103 × 286 × 131 mm | |
| Weight | approx. 2.11 kg |
Frequently Asked Questions
What is the ABB OTM125F4C21D400C used for?
The ABB OTM125F4C21D400C 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 OTM125F4C21D400C supports a rated operational current of 125 A.
How many poles does the ABB OTM125F4C21D400C 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 adjustable operating parameters.
Where is this automatic transfer switch installed?
The ABB OTM125F4C21D400C is typically installed in switchboards, generator panels and commercial or industrial 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.
