Supply of 132 kV and 220 kV isolators November 30, 2018 | Asia Pacific Tenders Competitive bids are invited for the supply of spare 132 kV and 220 kV isolators for switchyard of Mangla power station. The duration of the contract is 90 days from the date of award. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password