ABB OXA800U3X2QB Low Voltage Molded Case Circuit Breaker

ABB OXA800U3X2QB is a 3-pole TruONE automatic transfer switch rated for 800 A, engineered for near-continuous operation of critical loads. This open-type, bottom-entry (BOT-IN) unit uses Level 2 control via DIP switches to coordinate fast, reliable source transfer between primary and backup power sources, minimizing interruption. The model is part of ABB’s TruONE ATS family and is identified as the OXA800U3X2QB within ABB’s low-voltage transfer-switch lineup, designed for three-phase loads and compatible with open-type installation in switchgear or panel assemblies. Its Level 2 DIP-control scheme provides configurable transfer logic tailored to demanding electrical environments, while the three-pole construction supports balanced three-phase applications and straightforward integration with ABB’s automation ecosystem. Typical applications target environments where dependable source transfer matters, with ABB’s documentation emphasizing TruONE as a robust solution for critical-load scenarios. The OXA800U3X2QB designation places it among ABB’s series of 800 A, 3P, Level 2 transfer switches designed for open-type installation and bottom-entry wiring in industrial or commercial power-distribution schemes.