What is the difference between an ATS (Automatic Transfer Switch) and STS (Static Transfer Switch)?
Direct answer
An ATS uses mechanical switching and transfers power more slowly, while an STS uses solid-state components to achieve near-instantaneous power transfer.
Key takeaways
- ATS relies on mechanical components.
- STS uses solid-state switching.
- STS transfers power in under four milliseconds.
- STS minimizes disruption to sensitive loads.
Full explanation
An Automatic Transfer Switch automatically transfers power between sources using mechanical components such as relays and solenoids. This mechanical operation results in slower transfer times.
A Static Transfer Switch uses solid-state switching components, typically silicon-controlled rectifiers, to transfer power between sources. STS systems can transfer power in less than four milliseconds.
LayerZero eSTS units incorporate Dynamic Phase Compensation technology, allowing transfers to occur at the optimal moment and compensating for out-of-phase sources.
The primary difference between ATS and STS systems is transfer speed and suitability for sensitive, mission-critical loads.
Last reviewed by LayerZero Power Systems.