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Ningbo Orient Wires & Cables Co., Ltd designed and manufactured the Umbilical cable for Neptune Offshore Engineering Development Co., Ltd. in 2011.The cable is applied to power and data signals transporting for submarine trencher and in Li Wan 3-1 ditch project. The water depth is 400m. The cable is composited different 19 units as MV cable, control cable, computer cable and optical fiber. It's highly demanded for umbilical design and cabling technology.
The cable has breakthrough several technology difficulties. Firstly the umbilical needs winch retractable and belonging to deepwater application. As the cable not only needed high machinery strength and smaller bent stiffness; second as power cable and data cable
composited . It's easily produced interference .
Furthermore, the umbilical usually applied in sea. It required good fatigue resistance, wear resistance, ultraviolet light and water resistance to ensure the design life. Last, the umbilical is cabling complex with units and the stiffness differences is large, especially optical fiber is more vulnerable, and easily damaged in cabling process. Based on the above several technical difficulties , Orient engineers comprehensive
consideration technology key point as the umbilical cables cross section design, armoring, electromagnetic compatibility, materials design. Made several solutions and selected the optimal solution comparative analysis. At the same time, Ningbo Orient used the independent
development multi-unit cabling technology, confirmed the technical scheme of process tension control for each unit before production. Determined prior to the production process and implemented the real-time monitoring during the production process to ensure all units in the cabling process runs well.