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OXA1000U3O3QB ABB TruONE 1250A 4-Pole Automatic Transfer Switch
ABB TruONE OXA1000U3O3QB is a 1250 A IEC / 1000 A UL 4-pole open-transition automatic transfer switch with overlapping neutral, Level 3 LCD controls, 200–480 V AC voltage area and bottom source entry.
£10,194.41
Why Choose the ABB TruONE OXA1000U3O3QB Automatic Transfer Switch?
The ABB TruONE OXA1000U3O3QB is a purpose-built 1250 A IEC / 1000 A UL automatic transfer switch designed to provide automatic source transfer within critical power distribution systems. Supplied under ABB order code 1SCA153541R1001, it combines the transfer switch and controller within one integrated TruONE ATS assembly.
This model uses a 4-pole configuration with overlapping neutral and open-transition I-II operation. During transfer, the overlapping neutral arrangement maintains the neutral connection while transferring between sources, with the overlapping neutral pole positioned on the right-hand side of the switch.
The OXA1000U3O3QB features Level 3 controls with an LCD interface and a 200–480 V AC voltage area. Its bottom-entry arrangement places Source 1 and Source 2 connections at the bottom and the load connections at the top, while the detachable HMI supports convenient commissioning, monitoring and operation.
Key Advantages
- 1250 A IEC / 1000 A UL TruONE automatic transfer switch.
- Integrated switch and controller architecture reduces external wiring and connection points.
- 4-pole overlapping-neutral configuration maintains the neutral connection during source transfer.
- Open-transition I-II operation without a stable OFF position between sources.
- Level 3 LCD controls provide advanced ATS control and monitoring functionality.
- Bottom-entry configuration with sources at the bottom and load connections at the top.
- Detachable HMI provides flexible access to the ATS user interface.
- Designed for dependable automatic transfer in critical power applications.
Key Features
- ABB TruONE ATS integrated automatic transfer switch.
- IEC rated current: 1250 A.
- UL rated current: 1000 A.
- 4-pole configuration.
- Overlapping neutral with neutral pole on the right-hand side.
- Open-transition I-II transfer operation.
- Level 3 controller with LCD interface.
- 200–480 V AC voltage area.
- Bottom entry: Source 1 and Source 2 at bottom, load at top.
- Manual operating handle included.
- 2 m connection cable between detachable HMI and ATS frame included.
- Load-side phase barriers included for this frame size.
Integrated Automatic Power Transfer with Overlapping Neutral
ABB TruONE integrates the switching mechanism and ATS controller into a single purpose-built unit, reducing the amount of interconnection wiring normally required between separate transfer-switch and controller components. The OXA1000U3O3QB automatically manages transfer between two power sources using open-transition I-II operation.
Its overlapping-neutral arrangement is particularly significant in 4-pole systems because the neutral remains connected to the load during the source-transfer sequence. Combined with Level 3 controls, a detachable LCD HMI and a high-current 1250 A IEC rating, the OXA1000U3O3QB is designed for substantial critical-power and standby-source installations.
Typical Applications
- Mains-to-generator automatic transfer systems.
- Critical industrial power distribution.
- Data centre and communications infrastructure.
- Commercial building standby power systems.
- Healthcare and essential-services electrical systems.
- Large generator and alternative-source installations.
- 4-pole systems requiring an overlapping-neutral transfer arrangement.
Technical Specifications
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| Operation | Automatic | |
|---|---|---|
| Device Type | Automatic transfer switch | |
| Product family | TruONE ATS | |
| ABB product ID | 1SCA153541R1001 | |
| Product type | Automatic transfer switch | |
| Product group | OT Change over Switches | |
| IEC rated current | 1250 A | |
| UL rated current | 1000 A | |
| Number of poles | 4 | |
| Neutral arrangement | Overlapping neutral | |
| Transfer type | Open transition | |
| Operating sequence | I-II without stable OFF position | |
| Controller | Level 3 | |
| User interface | LCD | |
| Voltage area | 200–480 V AC | |
| Construction | Open style | |
| Cabling direction | Bottom entry | |
| Source connections | Bottom | |
| Load connections | Top | |
| HMI | Detachable | |
| HMI connection cable | 2 m, included | |
| Manual operating handle | Included | |
| Weight | 56.58 kg | |
| EAN | 6417019845678 |
Frequently Asked Questions
What is the current rating of the ABB OXA1000U3O3QB?
The OXA1000U3O3QB is rated at 1250 A under IEC ratings and 1000 A under UL ratings.
Is the ABB OXA1000U3O3QB a 4-pole ATS?
Yes. The OXA1000U3O3QB is a 4-pole TruONE automatic transfer switch with an overlapping-neutral arrangement.
What does overlapping neutral mean on this TruONE ATS?
The overlapping-neutral arrangement means the neutral is not disconnected from the load while transferring from one source to the other. On this configuration, the overlapping-neutral pole is positioned on the right-hand side.
Does the OXA1000U3O3QB use top or bottom source entry?
This model uses bottom entry: Source 1 and Source 2 connections are located at the bottom, while the load connections are at the top.
Which controller is fitted to the OXA1000U3O3QB?
The OXA1000U3O3QB uses ABB's Level 3 controller with an LCD interface and a detachable HMI connected to the ATS frame.
Trusted ABB Automatic Transfer Switching
ABB TruONE automatic transfer switches integrate switching and control functions into a purpose-built ATS platform for dependable source transfer, simplified installation and efficient operation in critical power systems.
