Operating Reliability

The ability to withstand sudden disturbances while avoiding uncontrolled cascading blackouts or damage to equipment.

Last Updated:  June 18, 2025

Definition by NERC

Source:

The ability of the Bulk-Power System to withstand sudden disturbances, such as electric short circuits or the unanticipated loss of system elements from credible contingencies, while avoiding uncontrolled cascading blackouts or damage to equipment.