There are currently about 700 homes in the Rodbourne and Cheney Manor areas without power.
Scottish and Southern Energy Power Distribution said it is aware of the problem and hopes to have it all fixed within the hour.
A spokesman for the company said: “There are currently just under 700 homes without power but our engineers are currently on site dealing with the issue.
“Power first went at 4.28pm today we do not know the cause but it should be back on by 5.25pm.
“We would like to apologise for any inconvenience caused and thank people for their patience.”
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