IEEE C37.90.1 2012 , “IEEE Standard for Surge Withstand Capability (SWC) Tests for Relays and Relay Systems Associated with Electric Power Apparatus,” is here and available from Document Center Inc. in both paper and pdf format. The 2012 Edition replaces and obsoletes the previous 2002 release. It has also been previously known ANSI/IEEE C37.90.1, ANSI/IEEE-C37.90a and IEEE Std 472, now all replaced by the new issue.
The standard has two types of design tests for relays and relay systems that relate to the immunity of this equipment to repetitive electrical transients. IEEE C37.90.1 covers test generator characteristics, test waveforms, selection of equipment terminals on which tests are to be conducted, test procedures, criteria for acceptance and the documentation of test results. The tests are to be applied to any part of the relay system that can be exposed to conducted or coupled transients under normal installed operating conditions.
For those of you interested in the reduction of parallel standards, this document has been harmonized with IEC standards where consensus could be reached (IEC 61000-4-18 Edition 1.1 (2011) and IEC 61000-4-4 Edition 2.1 (2011) in particular).
IEEE Standards are all available from Document Center Inc. (both current and many obsolete editions) at our website, www.document-center.com. Or contact us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com). You can count on us for up-to-the-minute information on the standards you rely on.