Tehran Power Transmission Maintenance Engineering Company (METANIR) with a background of almost half a century experience in maintenance and repair of power stations , power grid and SCADA systems after establishment in 1998 was able to present a well technical support to many affiliated companies to ministry of energy and other industry organizations. Our company is responsible for maintenance & services of more than 10000 Km of (63, 132, 230 and 400 Kv) transmission lines and also 300 power substations (63, 132, 230 and 400 Kv) which is more than %30 of Iran`s national electrical network.