VERIFICATION OF ANSI C37.90.1 SWC TEST GENERATOR OUTPUTS

Awareness of fast transient events in the electrical power environment has increased with the release of related test standards (ANSI C37.90 .1 and IEC 8014) and with increased usage of solid state circuits in u tility equipment. However, reliable measurement of the fast transient test waveforms and repeatable performance of test setups are persisten t problems for equipment manufacturers and users. This paper describes construction, characterization, and usage of two high voltage test di viders for measurement of fast transient test waveforms. Measurements on a C37.90.1 SWC test generator are presented along with some tutoria l background. Proposals for changes to the ANSI C37.90.1 specification are also included.