Scope

This guide covers the design, installation, and monitoring of time synchronization systems in power utility
substations. This includes time sources such as Global Positioning Satellite (GPS), and time distribution
systems such as Inter-Range Instrumentation Group Format B (IRIG-B), Network Time Protocol (NTP) or
Simple Network Time Protocol (SNTP), and IEEE Std C37.238™ plus IEC/IEEE 61850-9-3. This guide
assumes that the time source and the intelligent electronic device (IED) have accurate clocks.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN