Late night power failure as supplies are cut to sole French submarine cable

Jersey suffered an Island-wide power failure last night for the third time in six years.

Power was lost at 11.45pm when supplies through Jersey Electricity's remaining submarine supply cable to France, Normandie 2, were disrupted following a problem with a component in France which links the cable to the French grid.

With engineers unable to resolve the problem quickly, Jersey Electricity staff began generating at La Collette and Queen's Road using a combination of gas turbines and diesel engines.

Limited power was eventually restored at 2am with the entire Island back on supply within three to four hours of the failure, although Western Primary substation was briefly closed down affecting supplies to the west of the Island around 4.30am.

Electricity supplies were restored through the cable link by re-routing supplies just after 5am. The diesel engines were wound down but remain on standby.

The last Island-wide power cut occurred on 17 June when both supply cables to France failed, one permanently. A third cable is due to come into service in 2015.