What Does ERCOT Do If They Declare Energy Emergency Alert Level 3?

If operating reserves drop below 1,375 MW, ERCOT moves into level 3. If operating reserves drop below 1,000 MW and are not expected to recover within 30 minutes and/or the grid’s frequency level cannot be maintained at 60 Hz:

• As a last resort, instruct transmission companies to reduce demand on the electric system; typically in the form of controlled outages (rolling outages)