OXA260U3S3QB ABB TruONE 400A 4-Pole Automatic Transfer Switch

Why Choose the ABB TruONE OXA260U3S3QB Automatic Transfer Switch?

The ABB TruONE OXA260U3S3QB is a high-performance 400 A 4-pole automatic transfer switch designed for reliable automatic transfer between two power sources in critical power distribution systems. Supplied under ABB order code 1SCA153321R1001, it integrates the switching mechanism and controller into a single ABB TruONE ATS assembly. :chatgpt-content-reference{index="0"}

This model features a 4-pole switched-neutral configuration with open-transition I-II operation and no stable OFF position between Source 1 and Source 2. The fourth pole provides a simultaneous switched neutral function, making it suitable for installations requiring complete phase and neutral source transfer. :chatgpt-content-reference{index="1"}

The OXA260U3S3QB incorporates a Level 3 LCD controller and supports a wide 200–480 V AC main-circuit voltage range. Its bottom-entry arrangement places Source 1 and Source 2 connections at the bottom and load connections at the top, providing a practical configuration for compatible switchboards and power distribution assemblies. :chatgpt-content-reference{index="2"}

Key Advantages

• 400 A rated automatic transfer switch for industrial and commercial power systems.
• Integrated TruONE design combines the switch and controller into one seamless unit.
• 4-pole switched-neutral configuration enables complete source switching.
• Open-transition I-II operation provides controlled transfer between two supplies.
• Level 3 LCD controller provides advanced monitoring, configuration and control.
• 200–480 V AC voltage range supports a broad range of installations.
• Bottom-entry source configuration with load connections at the top.
• Purpose-built ATS architecture reduces wiring complexity and potential connection failures.

Key Features

• ABB TruONE ATS integrated automatic transfer switch.
• Rated current: 400 A IEC / 260 A UL.
• 4-pole configuration.
• Fourth pole: Switched simultaneous function.
• Open-transition I-II operation.
• Level 3 controller with LCD interface.
• 200–480 V AC main circuit voltage range.
• Bottom entry: supplies at bottom and load at top.
• Direct-mounted operating handle.
• Detachable HMI arrangement.
• 2 m HMI connection cable included.
• Bolt terminal connection system.

Integrated Automatic Power Transfer for Critical Systems

ABB TruONE integrates automatic transfer switching and control functions into one purpose-built assembly, reducing the separate components and interconnection wiring normally associated with traditional ATS solutions. The OXA260U3S3QB provides automatic source transfer using open-transition I-II operation with Level 3 LCD-based control. :chatgpt-content-reference{index="3"}

Its 4-pole switched-neutral design allows the neutral conductor to be transferred together with the three phase conductors. Combined with its 400 A IEC rating, 200–480 V AC capability and bottom-entry connection arrangement, it provides a flexible solution for standby and critical-power installations. :chatgpt-content-reference{index="4"}

Typical Applications

• Mains-to-generator automatic transfer systems.
• Industrial power distribution switchboards.
• Commercial building standby power systems.
• Critical manufacturing and process installations.
• Data and communications infrastructure.
• Healthcare and essential-services electrical systems.
• 4-pole systems requiring switched-neutral transfer.
• Automatic source selection and emergency power installations.