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The isolated traction current return allowed a train's position to be detected using DC track circuits, and reduced any earth leakage currents that could affect service pipes, telephone cables, or cast iron tunnel liners. [10] The traction current has no direct earth point, but there are two resistors connected in series across the traction ...
The CLR opened on 30 July 1900, [7] with a sharp curve west of Shepherd's Bush tube station to reach the depot, which was also used as a reversing siding. On 14 May 1908, [ 7 ] the line was extended to Wood Lane station at the north end of the site to serve the Franco-British Exhibition with an anti-clockwise loop back to Shepherd's Bush station.
The 85 existing 1992-stock trains are the most unreliable on the London Underground as they are equipped with the first generation of solid-state direct-current thyristor-control traction equipment. The trains often break down, have to be withdrawn from service at short notice and at times are not available when required, leading to gaps in ...
The first two battery locomotives supplied for the London Underground were manufactured by Hurst Nelson and Co, who were based in Motherwell.They were delivered in August 1905, and were used during the construction of the Great Northern, Piccadilly and Brompton Railway, where they were numbered 1B and 2B.
Ruislip depot is a London Underground traction maintenance depot on the Central line, and is situated between the stations of Ruislip Gardens and West Ruislip in the London Borough of Hillingdon. The depot is accessible from both ends, and was built for the Central Line extensions under the 1935-1940 New Works Programme.
The current S8 Stock trains ... Electric traction was introduced in 1905 with ... The Metropolitan line is the only London Underground line to operate non ...
London Underground rolling stock includes the electric multiple-unit trains used on the London Underground.These come in two sizes, smaller deep-level tube trains and larger sub-surface trains of a similar size to those on British main lines, both running on standard gauge tracks.
In the 1970s the original London Underground fourth-rail traction current supply was converted to a third-rail 750V DC system. The redundant centre fourth-rail was disconnected and left in situ since it was difficult to remove in the narrow tunnels. [12] Signalling is controlled from Kings Cross power box. [11]