In a pre-contingency situation, what time frame is indicated for transfer limits?

In a pre-contingency situation, the appropriate time frame for transfer limits is 15 minutes or less. This period is crucial because it ensures that operators have a clear and defined window for assessing and managing system reliability before any potential disruptions occur, such as equipment failures or unexpected load changes.

The strategic planning and real-time monitoring of transfer limits within this timeframe allow for timely adjustments in generation and transmission usage, which helps maintain system stability. Operators can respond swiftly to any emerging issues, ensuring that the grid operates efficiently and safely.

The other options do not align with operational protocols that dictate pre-contingency strategies, where immediate actions or longer time frames are inadequate for maintaining proper reliability in transmission.