Gas Insulated Substations, GIS.
Power and Energy Services' experience in GIS started
over thirty years ago with one of the first GIS installations in
Australia, ETSA's East Terrace Substion. Located in the CBD of Adelaide
this 225MVA, 275/66kV substaion is still the main supply for the CBD.
EHV supply is via an oil filled cable and the enclosed transformer
connections are through gas insulated busbar to the Mitsibishi GIS
swiitchgear. A basement and tunnels are used for supply and feeder
cables. Simon Ashby was Resident Engineer on this project.
Simon
was again Resident Engineer for three GIS substations in Nepal between
1988 and 1990, these were phase segregated high speed single pole
reclose, HSPAR, units rated at 275kV and 132kV but operated at 132kV
and 66kV.
He has subsequently investigated the use
of GIS for Western Power CBD substations and various hydro-electrical
and mining projects.
- Contractors: Mitsibishi Electrical and AEG Germany.
,
ETSA, East Terrace, Adelaide.
225MVA, 275/66kV Transformer. 
Transformer GIS busbar connections. 275kV GIS module .
275kV GIS busbars