Outages at or above which voltage must be submitted to ERCOT?

Outages at or above which voltage must be submitted to ERCOT?

• A. 138 kV or above
• B. 60 kV or above
• C. Only outages at 230 kV and higher
• D. All outages below 60 kV

Answer: (B)

Outages are reported to ERCOT based on the voltage level of the affected equipment, because only transmission-scale events need centralized coordination to protect the bulk electric system. The threshold used is 60 kV or above. This means any outage impacting equipment at or above 60 kV must be submitted to ERCOT so operators can monitor, analyze potential reliability impacts, and coordinate with other grid entities. Outages below 60 kV are typically considered distribution-level and managed by the local utility, unless they have wider system implications. The other thresholds would miss important transmission outages or inappropriately include only very low-voltage events, which isn’t how ERCOT organizes reliability coordination.

Outages are reported to ERCOT based on the voltage level of the affected equipment, because only transmission-scale events need centralized coordination to protect the bulk electric system. The threshold used is 60 kV or above. This means any outage impacting equipment at or above 60 kV must be submitted to ERCOT so operators can monitor, analyze potential reliability impacts, and coordinate with other grid entities.

Outages below 60 kV are typically considered distribution-level and managed by the local utility, unless they have wider system implications. The other thresholds would miss important transmission outages or inappropriately include only very low-voltage events, which isn’t how ERCOT organizes reliability coordination.