IEEE PC37.243

Revision Standard - Active - Draft.
A comprehensive guide to practical line current differential schemes using digital communications. Operating principles, synchronization methods, communication channel requirements, technologies, and design, current transformer requirements, external time reference requirements, backup considerations, testing considerations, and troubleshooting are included. This guide also provides specific guidelines for various application aspects including multi-terminal lines, series compensated lines, mutually coupled lines, line charging current, in-zone transformers and reactors, single-phase tripping and reclosing.

This guide presents line current differential protection using digital communications. Operating principles, synchronization methods, communication channel design, current transformer (CT) issues, backup protection considerations, testing methods, and troubleshooting fundamentals are included. It also provides specific guidelines for various application aspects including multi-terminal lines, series compensated lines, mutually coupled lines, line charging current, in-zone transformers and reactors, single-phase tripping and reclosing, as well as communications technologies.
This guide assists engineers in applying line current differential protection using digital communications channels.