| Berlin 380-kv Electric Line |
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The first section of the line, which entered service in 1977 , was an interconnector that consisted of a 2.6 Km Overhead Transmission Line and an 8.1 km underground cable, which ran from Reuter Power Station in Spandau to Mitte substation in Tiergarten ("Mitte" means "central"; the district of Berlin-Mitte was then in East Berlin ). It was the first time plastic Insulator s had been used. The overhead segment and an adjacent 110-kV line are the only overhead lines in former West Berlin. The underground section used water-cooled cable in an accessible tunnel. Both substations use totally enclosed SF6-insulated Switchgear . They are the oldest 380 kV substations with SF6 technology in Germany . After German Reunification the line was extended 7.6 km further west to Teufelsbruch substation in Spandau Forest, near Berlin's western border, in 1994. The city was finally relinked to the western German power grid via a new 170-km transmission line to Helmstedt , just behind the former inner-German border. At the same time, the 380-kV line was extended into former grid. The tunnel is up to 30 m deep, and has a small inspection railway. After the line was complete, several overhead lines in eastern Berlin were dismantled. EXTERNAL LINKS |
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