Maintenance works for 380/220/110 kV overhead lines February 26, 2021 | Europe Tenders Competitive bids are invited to enter into a five-year framework agreement from July 1, 2021 to June 30, 2026 for undertaking maintenance measures on 380/220/110 kV overhead lines. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password