OXA1200U3O3QT ABB TruONE 1600A 4-Pole Automatic Transfer Switch

Why Choose the ABB TruONE OXA1200U3O3QT Automatic Transfer Switch?

The ABB TruONE OXA1200U3O3QT is a high-current 1600 A IEC / 1200 A UL automatic transfer switch designed for automatic source transfer in critical power distribution systems. Supplied under ABB order code 1SCA151481R1001, it combines the transfer switching mechanism and controller within ABB's integrated TruONE ATS platform.

This model features a 4-pole configuration with overlapping neutral and open-transition I-II operation without a stable OFF position between Source 1 and Source 2. The overlapping-neutral arrangement keeps the neutral connected to the load during transfer, with the overlapping-neutral pole positioned on the right-hand side of the switch.

The OXA1200U3O3QT incorporates Level 3 controls and uses a top-entry connection arrangement, with Source 1 and Source 2 connected at the top and the load connected at the bottom. A manual operating handle and 2 m connection cable between the detachable HMI and ATS frame are included for convenient commissioning, operation and maintenance.

Key Advantages

• High-current 1600 A IEC / 1200 A UL automatic transfer switch.
• Integrated TruONE architecture combines the switch and controller in one unit.
• 4-pole overlapping-neutral configuration maintains neutral continuity during transfer.
• Open-transition I-II operation without a stable OFF position between sources.
• Level 3 controls provide advanced automatic transfer monitoring and control.
• Top-entry configuration with Source 1 and Source 2 at the top and load at the bottom.
• Detachable HMI supports flexible panel and switchboard installation.
• Designed for substantial critical-power, standby and alternative-source systems.

Key Features

• ABB TruONE ATS integrated automatic transfer switch.
• IEC rated current: 1600 A.
• UL rated current: 1200 A.
• 4-pole configuration.
• Overlapping neutral with neutral pole on the right-hand side.
• Open-transition I-II operation.
• Level 3 controller.
• 200–480 V AC TruONE voltage range.
• Top entry: Source 1 and Source 2 connections at top, load connections at bottom.
• Manual operating handle included.
• Detachable HMI arrangement.
• 2 m HMI-to-ATS connection cable included.
• Load-side phase barriers included.

High-Current Automatic Transfer with Overlapping Neutral

ABB TruONE integrates the automatic transfer switch and controller into a single purpose-built assembly, reducing the wiring and separate components associated with conventional transfer-switch installations. The OXA1200U3O3QT automatically manages transfer between two sources using open-transition I-II operation while retaining readily available manual operation when required.

Its overlapping-neutral configuration maintains the neutral connection to the load during the source-transfer sequence. Combined with its 1600 A IEC rating, 4-pole architecture and top-entry source arrangement, the OXA1200U3O3QT is particularly suited to large switchboards requiring high-current automatic source transfer and neutral continuity.

Typical Applications

• Mains-to-generator automatic transfer systems.
• Large industrial standby power installations.
• Critical manufacturing and process facilities.
• Data centres and communications infrastructure.
• Healthcare and essential-services electrical systems.
• Commercial building critical-power distribution.
• High-current alternative-source switching systems.
• 4-pole systems requiring overlapping-neutral transfer.
• Switchboards requiring top-entry source connections and bottom load connections.