IEEE PC37.81

Revision Standard - Active - Draft.
Requirements and guidance for the seismic 1 qualification of metal-enclosed power switchgear assemblies including switching, interrupting, control, instrumentation, metering, and protective and regulating devices mounted therein are provided in this guide. As used in this guide, the word switchgear shall mean metal-enclosed power switchgear assemblies with the requirements as defined in IEEE Std C37.20.1™, Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear, IEEE Std C37.20.2™, Standard for Metal-Clad Switchgear, and IEEE Std C37.20.3™, Standard for Metal-Enclosed Interrupter Switchgear. By definition, metal enclosed power switchgear assemblies include metal-clad switchgear, metal-enclosed interrupter switchgear, and low-voltage power circuit breaker switchgear. Metal-enclosed bus or control switchboards are not covered in this guide.

This guide provides requirements and guidance for the seismic qualification of metal-enclosed power switchgear assemblies including switching, interrupting, control, instrumentation, metering, protective, and regulating devices mounted there in. This guide helps equipment manufacturers to establish procedures that yield data to substantiate performance or by equipment users to evaluate and verify performance of representative devices and assemblies as part of an overall qualification effort. In this guide, the word switchgear means metal-enclosed power switchgear assemblies with the requirements as defined in IEEE Std C37.20.1, IEEE Std C37.20.2, IEEE Std C37.20.3. By definition, metal-enclosed power switchgear assemblies include metal-clad switchgear, metal-enclosed interrupter switchgear, and low-voltage power circuit breaker switchgear. This guide does not cover metal-enclosed bus or control switchboards.