Supply of 525 kV transformers December 16, 2016 | North America Tenders International competitive bids are invited for the supply of two 525/18 kV, 270/215/162 MVA and 302/240/181 MVA generator step-up (GSU) transformers (ONAN/ONAF1/ONAF2) in Blacksburg. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password