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OXA200U3O3QB ABB TruONE 250 A IEC 4-Pole Automatic Transfer Switch Level 3 Overlapping Neutral
ABB OXA200U3O3QB is a 250 A IEC and 200 A UL 4-pole TruONE automatic transfer switch with Level 3 controls, open-transition operation, overlapping neutral, bottom source connections and top load connections.
£6,139.76
Why Choose the ABB OXA200U3O3QB TruONE Automatic Transfer Switch?
The ABB OXA200U3O3QB is a 250 A IEC, 4-pole TruONE automatic transfer switch (ATS) designed for automatic transfer of electrical loads between two power sources. Part of the ABB TruONE ATS range, it combines the transfer switching mechanism and controller in an integrated assembly for critical, standby and industrial power distribution systems.
This model features Level 3 controls, open-transition I-II operation and an overlapping neutral. The overlapping neutral arrangement ensures that the neutral remains connected to the load while transferring from one source to another, with the neutral contact overlap period below 100 ms.
The OXA200U3O3QB has a 200 A UL rating and 250 A IEC rating with a 4-pole configuration. Source 1 and Source 2 connections are positioned at the bottom, while the load connections are at the top, matching the specified bottom-entry arrangement for integration into compatible switchboards.
Key Advantages
- 250 A IEC rated automatic transfer switch for critical and standby power applications.
- 200 A UL rated current for UL-based installations.
- 4-pole configuration with overlapping neutral functionality.
- Integrated Level 3 controls for automatic transfer management and monitoring.
- Open-transition I-II operation without a stable OFF position between sources.
- Overlapping neutral maintains neutral continuity during the transfer sequence.
- Bottom source connections and top load connections suit the specified switchboard layout.
Key Features
- ABB TruONE ATS series.
- 250 A IEC rated current.
- 200 A UL rated current.
- 4-pole automatic transfer switch.
- Level 3 controller.
- Open-transition I-II operation.
- Overlapping neutral with overlap period below 100 ms.
- Overlapping neutral pole positioned on the right-hand side.
- Source 1 and Source 2 connections at the bottom.
- Load connections at the top.
- Manual operating handle included.
- Includes a 2 m connection cable between the detachable HMI and ATS frame.
Integrated Automatic Transfer with Overlapping Neutral
The ABB TruONE platform integrates the transfer switch and automatic control functions into a unified ATS assembly. The system manages transfer between available power sources while reducing the separate components and external connections normally required in conventional automatic transfer switch installations.
The OXA200U3O3QB combines open-transition I-II operation with an overlapping neutral arrangement. During source transfer, the neutral remains connected to the load and the neutral contacts overlap for less than 100 ms, making the switch suitable for installations where maintaining neutral continuity through the transfer sequence is required.
Typical Applications
- Automatic mains-to-generator transfer systems.
- Critical and standby power distribution systems.
- Commercial and industrial electrical switchboards.
- Emergency and alternative power supply systems.
- Building services and infrastructure power distribution.
- Industrial installations requiring automatic source transfer with overlapping neutral.
Technical Specifications
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| Operation | Automatic | |
|---|---|---|
| Device Type | Automatic transfer switch | |
| Series | TruONE ATS | |
| ABB order code | 1SCA153306R1001 | |
| Product group | OT Change over Switches | |
| Product type | Automatic transfer switch | |
| Rated current (IEC) | 250 A | |
| Rated current (UL) | 200 A | |
| Number of poles | 4 | |
| Controller | Level 3 | |
| Transition type | Open transition with overlapping neutral | |
| Operating sequence | I-II without stable OFF position | |
| Neutral configuration | Overlapping neutral | |
| Neutral overlap period | Below 100 ms | |
| Overlapping neutral position | Right-hand pole | |
| Source connection position | Bottom | |
| Load connection position | Top | |
| HMI connection cable | 2 m | |
| Weight | approx. 15.74 kg |
Frequently Asked Questions
What is the ABB OXA200U3O3QB used for?
The ABB OXA200U3O3QB is a 4-pole automatic transfer switch used to transfer electrical loads automatically between two power sources in critical, standby and industrial power systems.
What is the current rating of the OXA200U3O3QB?
The OXA200U3O3QB is rated at 250 A under IEC ratings and 200 A under UL ratings.
What does overlapping neutral mean on the OXA200U3O3QB?
Overlapping neutral means the neutral remains connected to the load during transfer between sources. The neutral contact overlap period is below 100 ms.
Where are the source and load connections on the OXA200U3O3QB?
The OXA200U3O3QB has Source 1 and Source 2 connections at the bottom, while the load connections are positioned at the top.
Which controller is fitted to the ABB OXA200U3O3QB?
The OXA200U3O3QB is equipped with ABB Level 3 controls and a detachable HMI connected to the ATS frame by a supplied 2 m connection cable.
Trusted by Critical Power Professionals Worldwide
ABB TruONE automatic transfer switches integrate switching and control functions into a dedicated ATS platform, helping electrical engineers, panel builders and system integrators implement dependable automatic power-source transfer in commercial, infrastructure and industrial electrical systems.
