I 18 19 Gas Insulated Switchgear PPrroodduucctt DDeevveellooppmmeenntt HHiissttoorryy Year Milestones Year Milestones 2010 800kV 63kA GCB 800kV 50kA GIS 1999 2009 420/550kV 63kA GIS 362kV 63kA 8000A GIS 170kV GIS bay controller (IEC61850) 1998 The world’s first 800kV 50kA 8000A 2Pole GIS 25kV C-GIS bay controller (IEC61850) 362kV 63kA 4000A GIS 2008 25.8kV 25kA dry air insulated switchgear 1997 300kV 40kA 1600/3150A GIS 245kV 40kA motor direct drive mechanism GIS 1993 145kV 25kA 3Phase common tank GIS 1100kV 50kA CB 72.5kV 20kA 800/2000A GIS 2006 Partial discharge monitoring system for GIS 1992 170kV 31.5kA 3Phase common tank GIS 2005 36kV 31.5kA GIS 1987 170kV 31.5kA 1200A GIS 245kV 50kA GIS 1989 145kV 40kA GCB 2004 25.8kV 25kA GIS (New IEC standard) 1983 362kV 40kA 2Pole GIS 24kV 40kA 3000A GIS 1980 170kV 31.5kA GIS 362kV 50kA GIS 2003 420kV 50kA 1Pole GIS 1979 362kV GCB 170kV 50kA Condensorless 3Phase common tank GIS 1978 170kV GCB 2001 550kV 50kA GIS Global NNetwork