Isles of Scilly 33kV Cable Exposed (Due for Replacement)

Isles of Scilly 33kV Undersea Cable

Due for replacement sometime after 2015, the existing 33kV undersea cable to the Isles of Scilly from the mainland has been exposed by the 2013/14 winter storms.

The 55km cable installed in 1988 as part of a project to reinforce the supply to the islands, and to interconnect the outer islands, is at the end of its economic life.

The cable has a capacity of 7.5MW (maximum demand is currently approximately 4.5MW on the islands), and can be used to backfeed to the mainland 4MW if required from the 5.7MW primarily from the power station at St Mary’s.

Interestingly, the installation of the cable reduced electricity prices for islanders and allowed the introduction of Economy 7 using electricity from the mainland.

Isles of Scilly 33kV Undersea Cable

Isles of Scilly 33kV Undersea Cable

Isles of Scilly 33kV Undersea Cable

Isles of Scilly 33kV Undersea Cable

Isles of Scilly 33kV Undersea Cable

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