scope:

This standard applies to alternating current (ac) switchgear, designed for both indoor and outdoor installation and for operation at service frequencies up to and including 60 Hz on systems having voltages above 1000 V.

Application of this standard shall be indicated by normative reference to IEEE Std C37.100.1-2007 in the relevant equipment standard on a section or clause-by-clause basis. Refer to Annex A. The inclusion of this standard as a normative reference shall not imply that all of the requirements contained herein apply as a default. In the absence of a normative reference, this standard shall be considered informative only.¹ In case of a conflict in requirements, the requirements of the relevant equipment standard shall prevail.

NOTE 1-In general, this standard applies to all high-voltage power switchgear designed to IEEE C37™ series. Exceptions include low-voltage standards (less than 1000 V) and protective relay standards.²

NOTE 2-For the use of this standard, "high voltage" (see IEV 601-01-27)³ is the rated voltage above 1 kV. However, the term "medium voltage" (see IEV 601-01-28) is commonly used for distribution systems with voltages above 1 kV and generally applied up to and including 52 kV.

NOTE 3-There are many common requirements found in the IEEE C37 switchgear standards. These include service conditions, ratings, such as temperature rise limits, and test methods. This common requirements standard is provided to promote standardization of the requirements and to simplify the maintenance of these standards.

¹ This standard cannot be applied retroactively to an existing relevant equipment standard.

² Notes in text, tables, and figures of a standard are given for information only and do not contain requirements needed to implement the standard.

³ IEV refers to the International Electrotechnical Vocabulary and may be found in IEC 60050-XXX standards [B1], [B2], [B3], [B4], [B5]. For more information on these references, see the bibliography in Annex K.