The TECNED STS (SF/D) series is a high-performance Static Transfer Switch system designed to provide fast, reliable, and uninterrupted power transfer for critical applications. Available with single-phase input and output configurations and current ratings from 25A to 500A, the STS series provides dependable source transfer for industrial and critical power systems. Its static switching technology enables secure transfer between independent power sources, helping maintain continuous power to critical loads.

Available in 1-pole or 2-pole configurations, the STS series supports automatic, manual, and remote transfer modes with break-before-make switching technology. Integrated functions include source selection, source locking, input voltage monitoring, and alarm supervision for reliable system operation. The ST(D) model features an advanced digital controller with an LCD display for real-time monitoring, parameter configuration, diagnostics, and event logging. With its compact industrial design and fast transfer performance, the STS (SF/D) provides a reliable solution for applications where power continuity and system availability are essential.