Indoor Switching Stations for Underground Powerhouse

What is a GIS?

Gas Insulated Substation

To OP:

Were not there indoor switching stations before the advent of GIS?

those indoor switching stations before the advent of GIS cost less than GIS? Because as per my knowledge, these GIS are very costly around 3 to 4 times costlier than conventional type.

Regards,

sks

This link from ABB should answer your questions. They are expensive and used where space is a constraint.

http://search.abb.com/library/Download.aspx?DocumentID=100007&LanguageCode=en&DocumentPartId=&Action=Launch

Customer's need
Rio Light had two old AIS Substations operating
in very expensive locations (m² prices!). They
either wanted to maintain the existing S/S or to
build new S/S
ABB's response
ABB offered two 138/13,8 kV turnkey GIS
Substations, with 12 HV GIS Bays and 88 MV
GIS bays
ABB optimized the space requirements for the
S/S, enabling the saved area to be sold
Customer's benefits
Rio Light received two new S/S and the costs
were covered by the sales revenues of the
additional area

thanks for the link. We were discussing about alternatives to GIS - for indoor powerhouse. There is no space outside, so we have to go indoor substation.

regards,

sks

sir, what does O.P stand for - Original Post ?

Computers and phones have indoor switching stations