NERC NERC Protection and Control Systems 2

Question 1

What is a 'misoperation' in the context of NERC protection system standards?

Accepted Answer

Any unintended operation or failure to operate of a protection system

Answer

A misoperation is any protection system operation or failure to operate that does not match the intended design, including false trips or failure to trip during a fault.

Question 2

Under NERC PRC-004, what must entities do when a protection system misoperation is identified?

Accepted Answer

Analyze the misoperation, identify the cause, and implement corrective actions

Answer

PRC-004 requires entities to analyze each misoperation within 120 days, determine the cause, and implement corrective actions to prevent recurrence.

Question 3

Which NERC standard requires generator owners to verify that generator protection systems coordinate with system protection?

Accepted Answer

PRC-024

Answer

PRC-024 requires generator owners to ensure that generator protective relay settings allow generators to remain online during specified voltage and frequency excursions.

Question 4

What is the primary concern addressed by NERC standard PRC-025?

Accepted Answer

Load-responsive generator and motor protection relay settings to prevent unnecessary tripping

Answer

PRC-025 requires that generator and motor protection relays be set so they do not operate in response to load changes that do not represent a fault condition.

Question 5

How does NERC define the 'Protection System' for purposes of PRC-005?

Accepted Answer

Protective relays, communications, voltage and current sensing devices, DC supply, and the control circuitry

Answer

NERC's definition of Protection System includes relays, communications, sensing devices, DC supply (batteries and chargers), and all associated control circuitry.

NERC - North American Electric Reliability Corporation Practice Test

NERC - North American Electric Reliability Corporation Practice Test

NERC NERC Protection and Control Systems 2