||Specifies requirements for gas-insulated, metal-enclosed switchgear
in which the insulation is obtained, at least partly, by an
insulating gas other than air at atmospheric pressure, for
alternating current of rated voltages above 52 kV, for indoor and
outdoor installation, and for service frequencies up to and
including 60 Hz.
For the purpose of this standard, the terms "GIS" and "switchgear"
are used for "gas-insulated metal-enclosed switchgear".
The gas-insulated metal-enclosed switchgear covered by this standard
consists of individual components intended to be directly connected
together and able to operate only in this manner.
This standard completes and amends, if necessary, the various
relevant standards applying to the individual components
This first edition of IEC 62271-203 cancels and replaces the third
edition of IEC 60517, published in 1990, and constitutes a technical
With the revision, significant changes from the previous edition
have been made. The most important changes are deleting not used
technologies, like 3-phase PD measurements, adopting the content to
IEC 62271-1 'Common Clauses' and harmonisation with IEEE C37.122.
This standard is now more up to date to today's products on the
This International Standard should be read in conjunction with IEC
60694, second edition, published in 1996, its Amendment 1 (2000) and
its Amendment 2 (2001), to which it refers and which is applicable
unless otherwise specified.
This English-language version is derived from the original bilingual
publication by leaving out all French-language pages. Missing page
numbers correspond to the French-language pages.