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Milestones

Gas-insulated switchgear 72.5 kV - 1,200 kV

Switzerland

1968

World's first 170 kV GIS

Canada

1976

First 550 kV GIS

Brazil

1984

Largest 550 kV GIS installation

South Africa

1987

First 800 kV GIS

Germany

1992

First integrated 170 kV GIS

Germany

1997

Most compact 145 kV GIS

Germany

2005

Underground 145 kV GIS installation

China

2006

Chinas largest 500 kV GIS installation

China

2008

Ultra high-voltage 1,100 kV GIS

Russia

2009

Largest urban 550/220/123 kV GIS installation

Saudi Arabia

2010

Largest 420 kV GIS installation

India

2012

Highest voltage level in the world 1,200 kV GIS

Denmark

2013

First compact 420 kV GIS

2015

Offshore 420 kV GIS

Switzerland

2015

World’s first Eco-GIS 170 kV GIS

South Africa

2017

Africas largest 145 kV GIS installation