OXA200U3S3QB ABB TruONE 250A 4-Pole Automatic Transfer Switch

Why Choose the ABB TruONE OXA200U3S3QB Automatic Transfer Switch?

The ABB TruONE OXA200U3S3QB is a 250 A IEC / 200 A UL 4-pole automatic transfer switch designed for dependable automatic transfer between two power sources. Supplied under ABB order code 1SCA153309R1001, it combines the transfer switching mechanism and controller within ABB's purpose-built TruONE ATS platform.

This model features a 4-pole switched-neutral configuration and open-transition I-II operation without a stable OFF position between Source 1 and Source 2. Its integrated design reduces the number of separate components, wires and connections required compared with conventional transfer-switch installations.

The OXA200U3S3QB incorporates a Level 3 controller with LCD interface and supports a wide 200–480 V AC voltage range. Its bottom-entry source arrangement places Source 1 and Source 2 connections at the bottom and the load connections at the top, providing a practical configuration for compatible power distribution switchboards.

Key Advantages

• 250 A IEC / 200 A UL rated current for commercial and industrial automatic transfer applications.
• Integrated TruONE architecture combines the transfer switch and controller within one purpose-built unit.
• 4-pole switched-neutral configuration switches the neutral together with the phase conductors.
• Open-transition I-II operation provides controlled transfer between two sources.
• Level 3 LCD controller supports advanced ATS monitoring, configuration and control.
• Wide 200–480 V AC voltage range with ±20% tolerance.
• Bottom-entry source connections with load connections positioned at the top.
• Integrated architecture helps minimise wiring and potential connection points.

Key Features

• ABB TruONE ATS integrated automatic transfer switch.
• IEC rated current: 250 A.
• UL rated current: 200 A.
• 4-pole configuration.
• Switched-neutral arrangement.
• Open-transition I-II operation.
• Level 3 controller with LCD interface.
• 200–480 V AC wide voltage range.
• Bottom entry: Source 1 and Source 2 connections at bottom, load connections at top.
• Manual operating handle included.
• Detachable HMI arrangement.
• 2 m RJ45 HMI connection cable included.
• Terminal connection kits and mechanical lugs available separately.

Integrated 4-Pole Automatic Power Transfer

ABB TruONE integrates the automatic transfer switching mechanism and controller within a single assembly, reducing the separate wiring and connections associated with conventional ATS designs. The OXA200U3S3QB manages transfer between two power sources using open-transition I-II operation while providing local monitoring and configuration through its Level 3 LCD controller.

Its 4-pole switched-neutral arrangement provides switching of the neutral conductor together with the three phase conductors during source transfer. Combined with its 250 A IEC rating, wide voltage capability and bottom-entry source arrangement, the OXA200U3S3QB provides a versatile automatic transfer solution for standby and critical-power installations.

Typical Applications

• Mains-to-generator automatic transfer systems.
• Commercial building standby power systems.
• Industrial power distribution switchboards.
• Critical manufacturing and process installations.
• Data and communications infrastructure.
• Healthcare and essential-services power systems.
• 4-pole systems requiring switched-neutral source transfer.
• Switchboards requiring bottom-entry source and top load connections.