Erection of 500/220/66/22 kV GIS substation March 29, 2018 | Middle East & Africa Tenders International competitive bids are invited for the supply of transformer for the 500/220/66/22 kV El-Eqtsadiya 2 gas-insulated switchgear (GIS) substation (Package B). This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password