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closed track circuit relay

См. также в других словарях:

  • Track circuit interrupter — A track circuit interrupter may be fitted at catch points, trap points or buffer stops to maintain a track circuit in the occupied state in the event of a derailment. The track circuit remains de energised until the interrupter is replaced.… …   Wikipedia

  • Track circuit — A track circuit is a simple electrical device used to detect the presence or absence of a train on rail tracks, used to inform signallers and control relevant signals. Principles and operation The basic principle behind the track circuit lies in… …   Wikipedia

  • Relay — This article is about the electrical component. For other uses, see Relay (disambiguation). Automotive style miniature relay, dust cover is taken off A relay is an electrically operated switch. Many relays use an electromagnet to operate a… …   Wikipedia

  • Track and Field Sports — ▪ 2007 Introduction World Indoor Championships.       At the International Association of Athletics Federations (IAAF) world indoor championships, held in Moscow on March 10–12, 2006, Russia and the U.S. divided up a majority share of the gold… …   Universalium

  • 2008 Summer Olympics torch relay — 2008 Summer Olympics Bid process Venues Marketing Concerns and controversies Torch relay (route) Opening ceremony (flag bearers) Medal table (medalists) Closing ceremony Event calendar …   Wikipedia

  • Railway accidents in New South Wales — The railways of New South Wales, Australia have had several incidents and accidents since their formation in 1831.Accidents involving loss of lifeLocomotive No.1, 1858This locomotive, built in 1855 by Robert Stephenson with three others for the… …   Wikipedia

  • Centralized traffic control — (CTC) is a signalling system used by railroads. The system consists of a centralized train dispatcher s office that controls railroad switches in the CTC territory and the signals that railroad engineers must obey in order to keep the traffic… …   Wikipedia

  • Marathon — For other uses, see Marathon (disambiguation). Competitors during the 2007 Berlin Marathon …   Wikipedia

  • Charing Cross (Northern Line) tube crash — The Charing Cross (Northern Line) tube crash occurred at 08:32 hours on 10 March 1938, when two Northern Line trains collided near Charing Cross (now Embankment). Twelve people were slightly injured. The cause was a wrong side failure of the… …   Wikipedia

  • Promelectronica — Infobox Company company name = R P Centre «Promelectronica» company company type = The closed joint stock company company slogan = founder = foundation = 1991 in Ekaterinburg, Russia location = Ekaterinburg key people = Igor Tilk, Director… …   Wikipedia

  • Computers and Information Systems — ▪ 2009 Introduction Smartphone: The New Computer.       The market for the smartphone in reality a handheld computer for Web browsing, e mail, music, and video that was integrated with a cellular telephone continued to grow in 2008. According to… …   Universalium

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