Product Details Supplier Info More products

Nexans has completed a new 75km subsea power link between Pemba Island, the second largest island in the Zanzibar archipelago, and the National Grid on mainland Tanzania.

The 25 MVA link, opened officially on 3 June by president Amani Abeid Karume of Tanzania, has enabled Pemba’s population of 300,000 people to end years of dependence on unreliable, erratic diesel generation subject to frequent power cuts.

The availability of dependable electrical power is expected to assist the economic and social development of Pemba Island by opening up economic opportunities and encouraging tourism.

The Pemba cable project has been financed through a grant of EUR45m (GBP37m) from the Norwegian state, while the Zanzibar government has contributed EUR8m and the Union government EUR4m.

Norplan has managed the project on behalf of the Norwegian Ministry of Foreign Affairs and Zeco, the Zanzibar Electricity Corporation.

The 36kV PEX (XLPE) insulated cable was designed and manufactured at Nexans’ specialised subsea cable factory in Halden, Norway, and incorporates optical fibre elements supplied by the Rognan factory, also in Norway.

The cable, weighing more than 4,300 tonnes, was loaded onto Nexans’ own installation vessel, the C/S Nexans Skagerrak, and shipped to the Pemba Channel.

The cable route runs from Tanga on the Tanzanian side to Pemba Island and required installation under challenging conditions.

There are shallows on each side and the cable needed to be floated out for more than 4km before the sea bottom falls away steeply, after which the cable was guided down to a depth of 850m.

The fast-track project made rapid progress from the initial signing of the contract in 2008 and the new cable started supplying electricity to Pemba from the mainland in early 2010.

View full profile