What Is Automatic Transfer Switch?_
An ATS monitors the primary power source (e.g., utility grid) and, upon detecting a failure or significant deviation, commands the load to transfer to a secondary source (e.g., generator or UPS). This ensures continuous power to critical equipment during outages. The switch typically returns to the primary source automatically once stable power is restored.
Technical Details
ATS units use voltage and frequency sensing to determine source health, with adjustable thresholds and time delays to avoid nuisance transfers. Transfer mechanisms are either open-transition (break-before-make) or closed-transition (make-before-break), the latter enabling seamless paralleling of sources. In data-center racks, ATSs are often integrated into power distribution units (PDUs) or installed as standalone units rated for the rack's total load. Installation requires compliance with local electrical codes and coordination with generator or UPS startup sequences.
How Leviathan Systems Works with Automatic Transfer Switch
During rack assembly, we mount and cable ATS units in the power distribution path, typically above the PDUs in the rack. We verify source wiring and test automatic transfer per the site's commissioning plan, ensuring no power interruption to GPU servers during source failover.
Related service
GPU Rack Assembly & Rack-and-Stack →