All power wasn't lost, because a second switch remained active, allowing some electricity to flow over an alternate route.
WSJ: Device Setting Triggered Super Bowl Outage
That led the relay, a kind of sensing device, to incorrectly conclude there was an electrical problem and tell a nearby electrical switch to isolate the perceived problem, reducing the flow of power to the Superdome during the game's third quarter.
Reality extends to the plain fact that there is no switch or level to push, pull or toggle that will instantaneously change the polarity of the flow.
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