Railway catenary wire also named catenary , is a system of wires in a hanger for the purpose of conducting electricity. The term "catenary" refers to how these structures behave under the weight of the electric current carried by them; they are shaped like stretched piano wire, forming a curve similar to the letter "U". The wires support a uniform vertical line that has constant tension and therefore no sag as the cable's weight is supported by anchors at regular intervals. url : https://www.victorcables.in/product-range