• FA-123637 © Technisches Museum Wien, Photo: Peter Sedlaczek
Collection Area
Energy & Mining
Electrical Engineering
1990 - 1999
At the moment this object is not published in the museum.

SF6 high-voltage switching station

The space-saving miracle: at the end of the 1990s, the SF6 high-voltage switching station was the smallest 123-kV switching station in the world.

Transformer substations are links between power stations and high-voltage lines. In terms of area, outdoor switching stations tend to dominate these plants. They switch and monitor the high-voltage side of the system. Such use of the landscape was formerly of negligible significance. However, in urban areas, it played a weightier role in the cost and acceptance of power station projects.

Enclosed switching stations using sulphur hexafluoride (SF6) as an insulating material have been used on a large scale since 1965. This station required just 5 % or so of the space that would be required for an outdoor switching station. In 1997, it was the smallest 123-kV switching station in the world. The electrical variables of ‘voltage’ and ‘current’ are measured using new types of sensors. One particular feature is the gas-tight, plug-in cable connections without a liquid insulating compound.

Technical data
Type: EXK-01
Operating voltage: 123 kV
Nominal current: 2,500 A
Minimum insulating gas pressure at 20° C: 4.2 bar

Manufacturer and sponsor: Asea Brown Boveri
Year of construction: 1997

Inv.Nr. 50979
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