Half the lights are out in the Superdome during a power outage in the second half of the NFL Super Bowl XLVII football game between the San Francisco 49ers and Baltimore Ravens on Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Dave Martin)
Officials of the utility company supplying power to the Superdome say the Super Bowl outage occurred when sensing equipment detected an "abnormality" in the system.
A statement from Entergy and the Superdome said Sunday that a piece of equipment monitoring electrical load sensed the abnormality and opened a breaker, partially cutting power.
The statement said backup generators kicked in before full power could be restored.
The Super Bowl was delayed for 34 minutes.
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