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Wikipedia: A railway electrification system supplies electrical energy to railway locomotives and multiple units so that they can operate without having an on-board prime mover. There are several different electrification systems in use throughout the world. Railway electrification has many advantages but requires heavy capital expenditure for installation.
![[With surface contact third and fourth rail systems a heavy "shoe" suspended from a wooden beam attached to the...]](http://images.ookaboo.com/photo/s/Top_contact_pickup_shoe_s.jpg "With surface contact third and fourth rail systems a heavy \"shoe\" suspended from a wooden beam attached to the...")
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![[A bottom-contact third rail on the Amsterdam Metro, the Netherlands.]](http://images.ookaboo.com/photo/s/Derde_rail_s.jpg "A bottom-contact third rail on the Amsterdam Metro, the Netherlands.")
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 from Spsmiler |
from LennartBolks |
![[3 phase pantograph on a Corcovado Rack Railway train in Brazil.]](http://images.ookaboo.com/photo/s/Corcovado_Rack_Railcar_s.jpg "3 phase pantograph on a Corcovado Rack Railway train in Brazil.")
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from Chris j wood |
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