Seafox 5 is the largest jack-up in the Seafox fleet and is specifically designed to operate in harsh offshore environments throughout the year in water depths of up to 65 metres.
Electrical system integrator Alewijnse Marine successfully completed the electrical upgrade of this 151-metre, self-propelled, DP2 jack-up vessel. The works took place while the vessel was docked at Damen Verolme Rotterdam (DVR) shipyard for modifications ordered by owner and leading jack-up operator Seafox Contractors BV to prepare it for a new contract in the offshore wind industry.
The modifications were necessary to enable the vessel to fulfil a contract to install 66 six-megawatt wind turbines at the Merkur wind farm off the coast of Germany. The main task was to lengthen the main boom of the 1,200 tonne Liebherr crane. However, other repairs and upgrades were made while the vessel was in the yard, and Alewijnse Marine was commissioned to deliver and integrate the new electrical systems for the supply and installation of new cabling for the modified crane plus two additional power transformers, an EIVA ghost imaging system, gangway power supplies, additions to the CCTV system and UPS power supplies for the HV switchboard. Alewijnse also performed additional support activities.
Meeting the needs of the Offshore Wind sector
The decision by Seafox to choose Alewijnse Marine for the electrical works on Seafox 5 was based on the latter’s extensive experience in undertaking complex electrical engineering and automation projects on large offshore jack-ups and other vessels. Alewijnse has in recent years successfully completed refit, conversion and maintenance contracts on the Atlantic London, Atlantic Amsterdam and Atlantic Labrador jack-ups, as well as for the Rowan Viking drilling platform, diving support vessel Seawell and the jack-ups Seafox 2 and Seafox 4, sister ships to Seafox 5.
The project for Seafox 5 consolidates the already strong reputation that Alewijnse has in the offshore wind industry for undertaking all types of electrical installations across a wide range of support vessels. Early in the summer of 2017 the company delivered twin QA Bolt Tension Logging systems for the high-precision installation process of wind turbines to GeoSea, DEME's complex offshore marine engineering division. In addition, Alewijnse Marine is currently undertaking the complete electrical outfitting of a series of offshore crew transfer vessels (CTVs) for offshore wind support company Windcat Workboats. The works are taking place at Dok en Scheepsbouw Woudsend and the completed vessels are used to transport wind farm technicians and other personnel out to sites on a daily basis.
Mitch Opmeer, Alewijnse Project Manager for Seafox 5, commented: "We are very pleased to have been selected to carry out this complex electrical upgrade for Seafox, one of the world’s leading global offshore jack-up companies. Performing the project for the highly-advanced Seafox 5 once again demonstrates that Alewijnse has the skills and abilities required to successfully complete complicated electrical projects for the offshore wind sector."