onsdag 16 augusti 2017

UK electrification schemes cancelled #2

The new GW electrification is noteworthy for the chunkiness of the overhead structures, which are heavier than the notably solid gantries installed for the 1500kV Great Eastern electrification which was installed in 1949. One of the reasons for the adoption of 25kV electrification was that the smaller current flows made it possible to use thinner and lighter contact wires, and consequently lighter and cheaper structures. The Great Western's tunnel of steel must come at a commensurately heavy price, which has helped to push further electrification schemes into the realm of the unaffordable.

The overhead structures for the 15kV system used in Switzerland, Germany and Sweden are like gossamer in comparison. What has happened to let loose this orgy of over engineering?

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