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NERC Protection and Control Systems Flashcards

6 cards from real NERC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 NERC Protection and Control Systems flashcards as text

  1. Which NERC standard establishes maintenance and testing requirements for protection systems?

    Answer: PRC-005

    PRC-005 requires transmission owners, generator owners, and distribution providers to maintain and test BES protection systems on defined intervals.

  2. Under NERC PRC-005, what is the maximum allowable maintenance interval for a microprocessor-based relay with communication-assisted trip capability?

    Answer: 6 years

    PRC-005 allows up to a 6-year maintenance interval for microprocessor-based relays with monitoring that verifies the communication-assisted trip function.

  3. What is the purpose of NERC standard PRC-019?

    Answer: Coordination of voltage regulating controls with protection systems

    PRC-019 requires that generator voltage regulating system controls be coordinated with the generator's protection systems to prevent conflicting operations.

  4. A 'Single Point of Failure' in a protection system is significant under NERC because:

    Answer: It means one component failure can prevent the system from clearing a fault, risking cascading outages

    A single point of failure in protection systems means one component failure can prevent fault clearing, increasing the risk of cascading outages on the BES.

  5. Which NERC standard addresses out-of-step protection for the bulk electric system?

    Answer: PRC-026

    PRC-026 requires that load-responsive phase protection relays be set so they do not operate during stable power swings.

  6. NERC PRC-023 governs which aspect of relay protection?

    Answer: Transmission relay loadability to prevent incorrect operations under emergency loading

    PRC-023 requires relay protection settings to be set so relays do not operate during system emergencies when transmission lines are loaded to their emergency ratings.