File:Arcing pickup shoe.jpg

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Arcing_pickup_shoe.jpg ‎(800 × 573 pixels, file size: 115 KB, MIME type: image/jpeg)

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English: The London Underground uses a 4-rail system in which the electrical return is isolated from the running rails (the rails used by the train's wheels). The arc seen here on a District Line D Stock leaving Ealing Common Station are quite normal and occur when the electric power collection "shoes" of a train that is motoring (i.e. drawing power) reach the end of a section of electric power rail.
Русский: В Лондонском метрополитене используется 4-рельсовый путь, в котором обратный ток возвращается через отдельный рельс, изолированный от ходовых (по которым движутся колёса поезда). На фото показаны искры от поезда D78, отправляющегося со станции «Ближний Илинг» на линии Дистрикт. Это нормальное явление, происходящее, когда башмаки токоприёмников поезда, набирающего ход, проходят через промежутки в контактном рельсе.
Deutsch: Lichtbogen (Abreißfunke) an der Stromschiene bei der Londoner U-Bahn
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Author Taken by SPSmiler
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Date/TimeThumbnailDimensionsUserComment
current21:36, 16 October 2005Thumbnail for version as of 21:36, 16 October 2005800 × 573 (115 KB)SpsmilerThe London Underground uses a 4-rail system where the electrical return is isolated from the the running rails (the rails used by the train's wheels). Sparks like this are quite normal and occurs when the electric power collection [i]shoes.[/i] of a train

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