Supply of 72-230 kV outdoor current transformers November 17, 2017 | North America Tenders Requests for Proposal (RfP) are invited for thesupply and delivery of 72 kV, 138 kV and 230 kV outdoor current transformers (CTs) for SaskPower’s inventory. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password