Blackstart Resource testing requirements shall include the frequency of testing such that each Blackstart Resource is tested at least once every _____.

• A. 1 calendar year
• B. 2 calendar years
• C. 4 calendar years
• D. 3 calendar years

Answer: (D)

Testing frequency for Blackstart Resources is about ensuring readiness to restore service after a blackout within an appropriate, manageable window. A Blackstart Resource is equipment that can start the system without external power and help re-energize the grid during restoration.

The requirement says each Blackstart Resource must be tested at least once every three calendar years. Because of the phrasing “at least once every,” the interval between tests cannot be longer than three years. In other words, you could test more often if needed, but you must ensure that the gap between tests does not exceed three years. That’s why three calendar years is the correct interval. A longer gap, such as four years, would fail to meet the standard, while shorter gaps (one or two years) are permissible but not mandated by the minimum frequency.