Siem Offshore Contractors
Nordsee One Offshore Wind Farm
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Nordsee One OWF

33kV Inner Array Grid Cable System

Siem Offshore Contractors was awarded the contract for the turnkey engineering, procurement, installation and commissioning (EPIC) works related to the inner array grid cable system of the Nordsee One Offshore Wind Farm (OWF) project by Nordsee One.

The Nordsee One OWF is located approx. 40 km north of the island of Juist within the German Bight sector of the North Sea. The OWF consists of 54 wind turbine generators, each with a capacity of 6.15 MW and is based on an inner array grid of 59 medium voltage aluminium core submarine composite cables with a total length of up to 72km.

The submarine composite cables were manufactured and supplied by JDR Cable Systems and were subsequently installed by Siem Offshore Contractors utilising dedicated in-house resources such as the Cable Lay Vessel Siem Aimery and Instalation Support Vessel Siem Moxie.

Facts & Figures
  • 54 Wind Turbine Generators

  • 72 km of submarine cables

  • 1 Offshore Substation (OSS)

  • 2,343 W2W Connections

  • 332 MW installed capacity

  • 9,530 Personnel Transfers

Based on a trustful and respectful client-contractor relationship, projects can be delivered in professional manner, whilst being ahead of schedule and within budget."

Harald Poppinga
Project Manager
Specifications
Client: Nordsee One, Germany
Location: North Sea, German Sector
Water Depth: Up to 34 m
Scope: Supply of submarine composite cables
Supply of submarine cable accessories
Supply of cable protection systems
Marine cable route survey
UXO detection, identification and removal
Pre-lay grapnel run and route clearance
Cable installation, termination, testing and pre-commissioning
Type of Cables: 3-core submarine composite cable
Voltage Level: 33 kV
Conductor: Aluminium
No. of Cables: 59
Length of Cables: 72 km
WTG’s: 54 x 6.15 MW, Senvion
Total Capacity: 332 MW
Schedule: One (1) continuous campaign in 2016
Vessels: CLV Siem Aimery
ISV Siem Moxie
W2W Connections: 2,342
Personnel Transfers: 9,530

Website:  Nordsee One

More information: 4C Offshore

Offshore Wind Farm inner array grid cable installation on the Nordsee One OWF project as executed by Siem Offshore Contractors during the summer of 2016.

The submarine cable installation was performed using the leading Siem cable installation Duo (Siem Aimery – Cable Lay Vessel and Siem Moxie – Installation Support vessel).

Submarine cable installation works
jill-falenschek
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Jill Falenschek
Sales & Marketing Assistant
+49(0)491-91243-0
jill.falenschek@siemoffshore.com