Cross-arms could speed up connection of new electricity supplies

A revolutionary device developed by engineers at The University of Manchester and EPL Composite Solutions Ltd. could dramatically increase the capacity of the UK's electricity network, enabling rapid increases in renewable generation and lower bills for consumers.

Insulated cross-arms, manufactured and sold by University of Manchester spin-out company Arago Technology Ltd., have been installed on pylons in some of the most stark and remote areas of the UK to test their resistance to extreme weather and are also being tested for an eventual use with 400,000 volt systems at a coastal site in Scotland.

Tests have also been carried out at the University's High Voltage Laboratory, which has subjected them to lightning strikes of more than 1.4 million volts.

Modelling shows that in some cases the new cross-arms are capable of increasing the power carrying capability of a pylon by up to 2.5 times.

Installing the insulated cross-arms would aid the UK meet the growing demand for electricity and help in the connection of 'green' forms of electricity generation.

The dramatic increase in capacity of the electricity system that would result from the installation of the cross-arms could reduce the need to build more pylons and could reduce household bills.