For facility outages rated 345 kV and below, what is the notification period prior to a planned outage?

The correct notification period for facility outages rated 345 kV and below is 15 minutes. This time frame is significant because it allows for quick communication and coordination among operators to ensure system reliability while minimizing disruptions.

In the context of power transmission, timely notification is critical as it aids in managing the overall stability of the electrical grid, allowing other operators to make necessary adjustments. A notice of this duration ensures that both the transmission operator and stakeholders are aware of the planned work while maintaining the operational integrity of the network. This short timeline reflects the need for prompt responsiveness in a fast-paced environment where conditions and demands can change rapidly.

Longer notification periods for outages would not align with the operational dynamics often required in transmission systems that operate at high voltages, especially when considering the potential cascading effects from outages on system performance.