According to Scottish Southern Electricity Networks (SSEN), initial location testing indicated a fault on the 32km cable, which runs from Ardmore, Skye to Beacravik, Harris, around 15km from shore and in an area of deep water.
Further investigations are underway to identify the cause of the fault, including any instance of third-party damage, and to implement a restoration plan. This will establish whether a repair can be undertaken or, given the fault location, an end-to-end cable replacement is required.
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A spokesperson from SSEN said: "There is no impact to the supply of electricity to homes and businesses on Lewis and Harris as a result of the fault. In line with established network operation procedures, Battery Point Power Station will remain in full operation for the duration of the fault alongside on-island renewable generation. Further contingency measures, including coordination of additional fuel deliveries to the power station, are in place to ensure a continued safe and secure supply of electricity.
"As a result of the fault, there will be some restrictions to electricity generation export during the period. SSEN is in close contact with generators on Lewis and Harris to manage any generation constraint required and will look to minimise disruption wherever possible."
SSEN Distribution will undertake a comprehensive inspection and maintenance programme of its subsea cable assets. An end-to-end subsea survey of the Skye to Harris cable was undertaken this summer which did not identify any risk to the integrity of the network.
