earthed rail

См. также в других словарях:

• Railway electrification system — Railway electrification supplies electrical energy to railway locomotives and multiple units so they can operate without having a reciprocating engine of their own.CharacteristicsThe main advantage of electric traction is a higher power to weight …   Wikipedia

• London Underground infrastructure — The infrastructure of the London Underground includes 11 lines, which serve 268 stations by rail. Lines on the Underground can be classified into two types: subsurface and deep level. Lines of both types usually emerge onto the surface outside… …   Wikipedia

• Overhead power line — This article is about power lines for general transmission of electrical power. For overhead lines used to power road and rail vehicles, see Overhead lines. Transmission lines in Lund, Sweden …   Wikipedia

• Railway electrification in Great Britain — describes the past and present electrification systems used to supply traction current to railways and tramways in Great Britain with a chronological record of development, a list of lines using each system, and a history and a technical… …   Wikipedia

• Diesel locomotive — Three styles of diesel locomotive body: cab unit, hood unit and box cab. These locomotives are operated by Pacific National in Australia …   Wikipedia

• Ground-level power supply — 300px|thumb|right|A section of APS track showing the neutral sections at the end of the powered segments plus one of the insulating joint boxes whichmechanically and electrically join the APS rail segmentsGround level power supply, also known as… …   Wikipedia

• Mains electricity by country — This article includes a list of countries and territories, with the plugs, voltages and frequencies they use for providing electrical power to small appliances and some major appliances. For definitions of terms and further information on each… …   Wikipedia

• Electricity Supply Board — Infobox Company company name = Electricity Supply Board company company type = Statutory Corporation foundation = Dublin, Ireland (1927) location = Dublin, Ireland key people = Padraig McManus, CEO Lochlann Quinn Chairman num employees = 7000… …   Wikipedia

• Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …   Wikipedia

• Pentagrid converter — For other types of frequency converters please, see Frequency converter. The pentagrid converter is a radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio receiver. Grids of a 12SA7GT… …   Wikipedia