Some articles on ac overhead, overhead:
... of parts of the network to 25 kV 50 Hz AC overhead, the initial solution to the limited clearance problems in suburban areas (due to numerous tunnels and bridges) in London and Glasgow was to ... Shenfield Metro The line was originally electrified at 1,500 V DC overhead during the 1950s ... During the early 1960s, the line was converted to 6,250 V AC overhead during the early 1980s the line was again converted, this time to 25 kV ...
Famous quotes containing the word overhead:
“Theres something wonderfully exciting about the quiet sing song of an aeroplane overhead with all the guns in creation lighting out at it, and searchlights feeling their way across the sky like antennae, and the earth shaking snort of the bombs and the whimper of shrapnel pieces when they come down to patter on the roof.”
—John Dos Passos (18961970)