In 2017, Powertek was awarded the contract to carry out all of the cable jointing works at Kype Muir and Middle Muir Windfarms. Kype Muir is a 26 turbine development with an electrical generation capacity totaling up to 88.4MW. Similarly, Middle Muir boasts 15 turbines with a total capacity of 51MW. Both sites are powered by 33kV electrical infrastructure ranging from 95mm² up to 800mm² XLPE cables which Powertek tested, jointed and terminated.
All of the cables linking the turbines with the substation were jointed using Scottish Power approved methods of working by our 33kV authorised jointers. Our skilled teams ensured that the cables were jointed in such a way that the trefoil run was maintained up to the edge of the joint.
The 33kV cables were installed from basement level to entry level within the wind turbines, using the pre-installed ladder-rack. The cables were then cleated to the ladder-rack at appropriate intervals, making them ready to be terminated within the HV apparatus. Before work commenced on the Pfisterer terminations, phasing was checked by means of a continuity tester.
A total of 68 sets of 3 Pfisterer terminations and a total of 35 sets of 3 Pfisterer terminations were completed at Kype Muir and Middle Muir respectively. This was achieved through the use of GWO trained cable jointing teams, fully authorised in the installation of Pfisterer equipment.
The work was completed safely, on budget and on schedule allowing for the site to be energised and fully operational by December 2018. The completed wind farms will provide enough capacity to power over 80,000 homes in Scotland.