Feb 2013
Electricity Transmission
Insulated Composite Crossarm
IFIT 2009_01
Feb 2013
Scottish and Southern Electricity Networks
SSEN Future Networks Team
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Innovation Funding Incentive
Asset Management
The project carries on from work done between Manchester University (UoM) and National Grid (NG). SHETL was approached early in 2010 by UoM to participate in the development of the project beyond where it had progressed to, specifically to assist with the environmental testing of the designs. As such it was agreed that SHETL would support a project to install a number of crossarms on an exposed dead transmission line that is subjected to some of the harshest weather possible on the British Isles and certainly the harshest any British transmission line is exposed to. Along with this a coastal trial site would be identified and a number of crossarms installed to test their ability to withstand pollution.
The use of an insulating cross-arm potentially allows the upgrading of an L3 275 kV tower to operate at 400 kV or other tower types to raise their voltage level and the elimination of the insulator strings.