scope:

This document specifies standard service conditions, standard ratings, environmental performance requirements, and testing requirements for communications networking devices installed in electric power substations.  It does not cover such equipment designed for operation in other environments, such as office locations.  It does not cover such equipment used in protective relaying applications, for which IEEE Std C37.90-1989, IEEE Std C37.90.1-2002,  IEEE Std C37.90.2-1995, and IEEE Std C37.90.3-2001 apply.

Purpose

The purpose of this standard is to define the environmental conditions present in electric power substations and to establish a common reproducible basis for designing and evaluating communications networking devices to be installed in those substations.  It is a freestanding document, with only one normative reference to another standard.