ANNEX ISupplementary provisions
ANNEX I 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.