OXA1200U3O3QB ABB TruONE 1600A 4-Pole Automatic Transfer Switch

Why Choose the ABB TruONE OXA1200U3O3QB Automatic Transfer Switch?

The ABB TruONE OXA1200U3O3QB is a high-current 1600 A IEC / 1200 A UL automatic transfer switch designed for dependable source transfer in critical power distribution systems. Supplied under ABB order code 1SCA151480R1001, it combines the transfer switching mechanism and controller within ABB's integrated TruONE ATS platform.

This model uses 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 maintains the neutral connection to the load during transfer, supporting applications where neutral continuity through the source-change sequence is required.

The OXA1200U3O3QB is equipped with Level 3 controls and an LCD interface. Its bottom-entry arrangement places Source 1 and Source 2 connections at the bottom and load connections at the top, while the supplied manual operating handle and detachable HMI connection cable support convenient commissioning, local operation and maintenance.

Key Advantages

• High-current 1600 A IEC / 1200 A UL TruONE automatic transfer switch.
• Integrated transfer switch and controller architecture reduces separate components and interconnection wiring.
• 4-pole overlapping-neutral configuration maintains neutral continuity during source transfer.
• Open-transition I-II operation without a stable OFF position between sources.
• Level 3 LCD controls provide comprehensive ATS monitoring and control functionality.
• Bottom-entry configuration with sources connected at the bottom and load at the top.
• Detachable HMI supports convenient local operation and commissioning.
• Designed for substantial standby, critical-power and alternative-source installations.

Key Features

• ABB TruONE ATS integrated automatic transfer switch.
• IEC rated current: 1600 A.
• UL rated current: 1200 A.
• 4-pole configuration.
• Overlapping neutral.
• Open-transition I-II operation.
• Level 3 controller with LCD interface.
• Bottom entry: Source 1 and Source 2 at bottom, load at top.
• 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 combines automatic transfer switching and control functions within a single integrated assembly, helping reduce installation complexity compared with systems assembled from separate switching and control components. The OXA1200U3O3QB automatically manages transfer between two sources using open-transition I-II operation and provides local monitoring and configuration through its Level 3 LCD interface.

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 bottom-entry source connections, this configuration is particularly suited to large critical-power switchboards where high-current automatic source transfer and neutral continuity are required.

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 installations requiring overlapping-neutral transfer.