In June 2005, Deepwater supplied and supervised the installation of seven (7) Vaulted Seawater Envelope (VSE) anode arrays on wind turbine monopiles in the Irish Sea. Each monopile was retrofitted with one VSE and one transformer rectifier. The wind farm is located in 8 m -10 m water depth. The VSE anode system minimizes the risk of snagging by fishing activities while maintaining a uniform circuit resistance when the system silts over. Assets to be protected included:
• 7 x Offshore Wind Turbines
The retrofit cathodic protection (CP) system consisted of:
The VSE assemblies were installed 10 m to 15 m from the base of the monopiles. Dual-armored single-conductor cable was routed from the VSEs, across the bottom to the base of the monopiles and then up through specially-installed I-tubes to the rectifiers located at the (+) 13 m elevation. The systems, including I-Tubes, were installed on all seven monopiles in a total of eleven work days utilizing a dive support boat with lifting “A” frame. In addition, DR-2 CD polarization monitors were installed to monitor the performance of the new CP system.