NERC Timing Requirements

Question 1

BA - CPS 1

Answer 1

Annual (rolling) average of the clock-minute averages

Question 2

BA - CPS 2

Answer 2

Monthly clock ten-minute periods

Question 3

BA - Disturbance Recovery Period

Answer 3

15 minutes (ACE)

Question 4

BA - Contingency Reserve qualification requirement

Answer 4

Deployable (responds) within 10 minutes

Question 5

BA - Contingency Reserve Recovery Period

Answer 5

90 minutes

Question 6

BA - Governor not in Service

Answer 6

30 minutes of discovery

Question 7

BA - shall calculate Primary Inadvertent Interchange hourly, accumulative

Answer 7

50 minutes after each hour

Question 8

BA - that is unable to calculate ACE

Answer 8

More than 30 minutes it shall notify its Reliability Coordinator

Question 9

BA - DCS source data

Answer 9

For a time period of two minutes prior to thirty minutes after the identified Disturbance

Question 10

BA - Restoration of Operating Reserve (WECC)

Answer 10

60 minutes

Question 11

TOP and BA - BES Cyber Asset

Answer 11

Would cause an impact to reliability within 15 minutes

Question 12

Responsible Entity - has an alert for unauthorized access to Physical Access Control Systems

Answer 12

Alerts within 15 minutes

Question 13

RC, TOP and BA - Failure of Interpersonal Communication capability

Answer 13

Shall notify within 60 minutes of the detection of a failure of its Interpersonal Communication capability that lasts 30 minutes or longer.

Question 14

BA - Loss of resources covered by an energy agreement shall ensure that a Request for Interchange (RFI) is submitted no more than ____________ beyond the resource loss

Answer 14

60 minutes

Question 15

RC - Shall have clear decision-making authority to act and to direct actions to preserve integrity and reliability without delay, but no longer than _________.

Answer 15

30 Minutes

Question 16

Relieve IROL violations in no longer than _____________. (ERCOT)

Answer 16

30 minutes

Question 17

RC - Shall approve or deny a request within __________ of receiving the request for unscheduled flow transmission relief from the Transmission Operator of a Qualified Transfer Path (WECC)

Answer 17

5 minutes

Question 18

RC - Shall perform a Real-Time Assessment at least once every _____________.

Answer 18

30 minutes

Question 19

TOP - Triggered record lengths of at least three minutes for off nominal frequency trigger set at: (1/3)

Answer 19

Eastern Interconnection: <59.75 Hz >61.0 Hz
Western Interconnection: <59.55 Hz >61.0 Hz
ERCOT Interconnection: <59.35 Hz >61.0 Hz
Hydro-Quebec Interconnection: <58.55Hz. >61.5 Hz

Question 20

TOP - Under-voltage trigger set no lower than 85 percent of normal operating voltage for a duration of ___________. (3/3)

Answer 20

5 seconds

Question 21

TOP - Set relays to allow the transformer to be operated at an overload level of at least 150% of the maximum applicable nameplate rating, or 115% of the highest operator established emergency transformer rating, whichever is greater, for at least _________ to allow an operator to respond.

Answer 21

15 minutes

Question 22

TOP and BA - shall notify its Reliability Coordinator and known impacted interconnected entities of all planned outages, and unplanned outages of 30 ____________ or more, for telemetering and control equipment, monitoring and assessment capabilities, and associated communication channels between the affected entities.

Answer 22

30 minutes

Question 23

TOP - Shall ensure that a Real-time Assessment is performed at least once every ____________.

Answer 23

30 minutes

Question 24

TOP - enters an unknown operating state (i.e. any state for which valid operating limits have not been determined). It will be considered to be in an emergency and shall restore operations to respect proven reliable power system limits within ____________.

Answer 24

30 minutes

Question 25

RC, TOP and BA - Operational Reliability Information shall be updated at least ___________.

Answer 25

Ten minutes

Question 26

TOP - Following a Contingency or other event that results in an IROL violation, shall return its transmission system to within IROL, as soon as possible, but no longer than ___________.

Answer 26

30 minutes

Question 27

RC - Shall report any IROL violation exceeding ________________ to the Regional Reliability Organization and NERC with ____________.

Answer 27

30 minutes ; 72 hours

Question 28

TOP - Shall take immediate action to reduce the actual power flow across the path such that at no time shall the power flow for the Transmission path exceed the SOL for more than ______________

Answer 28

30 minutes

Question 29

GO - Shall notify its associated Transmission Operator of a status change on the AVR, power system stabilizer, or alternative voltage controlling device within ____________ of the change

Answer 29

30 minutes

Question 30

GO - shall notify its associated Transmission Operator within ______________ of becoming aware of a change in reactive capability due to factors other than a status change.

Answer 30

30 minutes

Question 31

Voltage deviation of +/- ___________ of nominal voltage sustained for greater than or equal to ___________________.

Answer 31

10%; 15 continuous minutes

Question 32

Operate outside the SOL for more than ______________ for Major WECC Transfer Paths (WECC only)

Answer 32

30 minutes

Question 33

Loss of firm load for greater than or equal to ______________.

Answer 33

15 minutes

Question 34

Unplanned evacuation from BES control center facility for ______________ or more.

Answer 34

30 continuous minutes

Question 35

Complete loss of voice communication capability affecting a BES control center for _____________ or more

Answer 35

30 continuous minutes

Question 36

Complete loss of monitoring capability affecting a BES control center for ______________ or more.

Answer 36

30 continuous minutes

Question 37

Report to deny a Reliability Adjustment Arranged Interchange within _______________.

Answer 37

10 minutes