What is GIS Substation and how it operate? where these type
of substation installed?

Answer Posted / ravi singh

GIS electrical substation-GAS INSULATED SUBSTATION
IT comprises of chambers filled with inert gas (as filled
in SF -6 )of bus bars,switch gears GIS S/STN are of
66/132/220/440 KV levels thease are imported mfd by
renouned companies viz siemens/ABB etc
EHT cables directly terminates to gis S/Stn these are
unmanned operated maintenance free

Thease aer installed where there is constaints of the
space/land because of compact size this saves costly land

cost of the GIS is appx 2.5 times than convential s/satn
butsince usage is increasing therfore in comming time cost
to come down to the 15% more to AIS


Ravi Sing

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