What is Underfrequency Load Shedding?

Watch our video to learn more about Underfrequency Load Shedding and how Hydro works to maintain a balance in our system.

If there is a sudden loss of generation due to a trip or issue on the electricity system, Hydro automatically drops predetermined blocks of customers to quickly balance the system. This is called Under Frequency Load Shedding and it a mechanism designed to protect the system from further damage or a widespread outage. On average, under frequency events occur 5-8 times per year on the island part of the province and power outages are usually less than 30 minutes. Different blocks of customer are affected each time.