ANNEX IU.K. Frequency ranges and time periods referred to in Article 12(1)
| Synchronous area | Frequency range | Time period for operation |
|---|---|---|
| Continental Europe | 47,5 Hz-48,5 Hz | To be specified by each TSO, but not less than 30 minutes |
| 48,5 Hz-49,0 Hz | To be specified by each TSO, but not less than the period for 47,5 Hz-48,5 Hz | |
| 49,0 Hz-51,0 Hz | Unlimited | |
| 51,0 Hz-51,5 Hz | 30 minutes | |
| Nordic | 47,5 Hz-48,5 Hz | 30 minutes |
| 48,5 Hz-49,0 Hz | To be specified by each TSO, but not less than 30 minutes | |
| 49,0 Hz-51,0 Hz | Unlimited | |
| 51,0 Hz-51,5 Hz | 30 minutes | |
| Great Britain | 47,0 Hz-47,5 Hz | 20 seconds |
| 47,5 Hz-48,5 Hz | 90 minutes | |
| 48,5 Hz-49,0 Hz | To be specified by each TSO, but not less than 90 minutes | |
| 49,0 Hz-51,0 Hz | Unlimited | |
| 51,0 Hz-51,5 Hz | 90 minutes | |
| 51,5 Hz-52,0 Hz | 15 minutes | |
| Ireland and Northern Ireland | 47,5 Hz-48,5 Hz | 90 minutes |
| 48,5 Hz-49,0 Hz | To be specified by each TSO, but not less than 90 minutes | |
| 49,0 Hz-51,0 Hz | Unlimited | |
| 51,0 Hz-51,5 Hz | 90 minutes | |
| Baltic | 47,5 Hz-48,5 Hz | To be specified by each TSO, but not less than 30 minutes |
| 48,5 Hz-49,0 Hz | To be specified by each TSO, but not less than the period for 47,5 Hz-48,5 Hz | |
| 49,0 Hz-51,0 Hz | Unlimited | |
| 51,0 Hz-51,5 Hz | To be specified by each TSO, but not less than 30 minutes |
The table shows the minimum time periods for which a transmission-connected demand facility, a transmission-connected distribution facility or a distribution system has to be capable of operating on different frequencies, deviating from a nominal value, without disconnecting from the network.
ANNEX IIU.K. Voltage ranges and time periods referred to in Article 13(1)
| Synchronous area | Voltage range | Time period for operation |
|---|---|---|
| Continental Europe | 0,90 pu-1,118 pu | Unlimited |
| 1,118 pu-1,15 pu | To be specified by each TSO but not less than 20 minutes and not more than 60 minutes | |
| Nordic | 0,90 pu-1,05 pu | Unlimited |
| 1,05 pu-1,10 pu | 60 minutes | |
| Great Britain | 0,90 pu-1,10 pu | Unlimited |
| Ireland and Northern Ireland | 0,90 pu-1,118 pu | Unlimited |
| Baltic | 0,90 pu-1,118 pu | Unlimited |
| 1,118 pu-1,15 pu | 20 minutes |
The table shows the minimum time periods during which a transmission-connected demand facility, a transmission-connected distribution facility or a transmission-connected distribution system has to be capable of operating for voltages deviating from the reference 1 pu value at the connection point without disconnecting from the network where the voltage base for pu values is at or above 110 kV and up to (not including) 300 kV.
| Synchronous area | Voltage range | Time period for operation |
|---|---|---|
| Continental Europe | 0,90 pu-1,05 pu | Unlimited |
| 1,05 pu-1,10 pu | To be specified by each TSO but not less than 20 minutes and not more than 60 minutes | |
| Nordic | 0,90 pu-1,05 pu | Unlimited |
| 1,05 pu-1,10 pu | To be specified by each TSO but not more than 60 minutes | |
| Great Britain | 0,90 pu-1,05 pu | Unlimited |
| 1,05 pu-1,10 pu | 15 minutes | |
| Ireland and Northern Ireland | 0,90 pu-1,05 pu | Unlimited |
| Baltic | 0,90 pu-1,097 pu | Unlimited |
| 1,097 pu-1,15 pu | 20 minutes |
The table shows the minimum time periods during which a transmission-connected demand facility, a transmission-connected distribution facility or a transmission-connected distribution system has to be capable of operating for voltages deviating from the reference 1 pu value at the connection point without disconnecting from the network, where the voltage base for pu values is from 300 kV to 400 kV (including).