electric wires sag.how is this overcome in trains which take electric supply?

Question by pavan: electric wires sag.how is this overcome in trains which take electric supply?

Best answer:

Answer by phi071237
it is natural for electric wires to sag as they are above ground for use by the trains powered by electricity. another way however is available near the train wheel and rail tracks

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New gantry for overhead wires

New gantry for overhead wires
electric trains
Image by lancea
New gantry for overhead wires that power the electric trains. Taken through the window of a moving train, just out of Wellington station.

Extensive work is underway on the Wellington regional railway in preparation for the arrival of new electric trains in 2010. Many new substations are being built. The overhead cables and tracks are being upgraded.