SSC600 Protection Relay Firmware Update Release 1.2.3

This document details firmware update release 1.2.3 for the SSC600 protection relay, which includes usability improvements and cumulative fixes for protection, communication, performance, engineering, and monitoring functions. It also references the previous release 1.2.2 and provides update procedure guidance, noting that all units shipped after January 26, 2024 include this firmware.