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Tel. +45 7916 6666


Semco Maritime
Esbjerg Brygge 30
DK- 6700 Esbjerg

West of Duddon Sands 
Offshore Substation

Customer: ØrstedLocation: The UK part of the Irish Sea Period: 2010 - 2011Topside weight: 1520 tonsCapacity: 389 MW

The scope of work included electrical consultancy engineering for 150/400 kV onshore substation, 400 kV GIS/150 kV GIS, reactors and filters as well as delivery and installation of SemTETRA air repeater system for 104 wind turbine generators at the West of Duddon Sands offshore wind farm.

Competences and systems
  • Main transformer
  • 150 kV GIS
  • 150 kV export cable
  • 36 kV GIS
  • Reactors
  • Auxiliary transformer
  • Low-voltage systems
  • Diesel generator systems
  • Drainage and waste systems
  • HVAC systems
  • Communication and IT systems
  • Platform identification systems
  • Project management
  • Test & commissioning
  • Positive feedback from customer regarding general workflow and quality of work delivered
  • The project was delivered on time