IEEE C37.20.9a-2024
IEEE C37.20.9a-2024
IEEE Standard for Metal-Enclosed Switchgear Rated 1 kV to 52 kV Incorporating Gas Insulating Systems Amendment 1: Clarification of Metal-Enclosed Gas-Insulated Switchgear (MEGIS) Types Covered, Refilling and Monitoring Requirements, and Production Test RequirementsAmendment by IEEE , 06/28/2024