Electricity was briefly cut off in most parts of Newfoundland and Labrador Tuesday, first in Labrador and then on the island.
Newfoundland and Labrador Hydro first dealt with an outage in Labrador that was connected to the Churchill Falls station.
"This morning there was an issue affecting the delivery of power from Churchill Falls to Quebec resulting in a power interruption to all of the Labrador interconnected system," a Hydro official said in an email to CBC News.
"System protection systems automatically initiated and shut down to protect equipment."
But within 25 minutes, there was a separate trip at the Holyrood backup generating station in eastern Newfoundland, which caused a massive loss of supply to Newfoundland Power customers.
Hydro immediately dropped its load so that it could begin restoring power in stages.
Most customers had their power restored within a half hour.