Replacement of control and protection system for 315/120 kV substation September 22, 2017 | North America Tenders Requests for Proposal (RfP) are invited for the replacement of the control and protection system for the 315/120 kV Aqueduc substation and related seven 15-25 kV substations. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password