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The SEL-2740S Software-Defined Network Switch improves cybersecurity, network performance, and traffic management in the substation LAN. And now, the SEL-2740S supports Precision Time Protocol (PTP), defined by the IEEE 1588 standard. PTP is used to synchronize time over Ethernet networks to within a microsecond.

This microsecond accuracy is required for power system applications such as synchrophasors, Sampled Values, and traveling-wave fault locating. The SEL-2740S Switch acts as a PTP transparent clock and uses the IEEE C37.238 power system profile to ensure high-accuracy time synchronization throughout the substation.

With the SEL-2740S, the SEL-2488 Satellite-Synchronized Network Clock and SEL-400 series protective relays, SEL now offers a reliable, end-to-end PTP solution for the electric utility substation. This single-manufacturer solution ensures compatibility and simplifies support.

More details on SEL software-defined networking are available on the solution page .