# Commission Regulation (EU) 2016/1388 of 17 August 2016 establishing a Network Code on Demand Connection (Text with EEA relevance), Annex I: Frequency ranges and time periods referred to in Article 12(1)

Extent: E+W+S+N.I.

Synchronous area
Frequency range
Time period for operation
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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
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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.

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Source: https://www.legislation.gov.uk/eur/2016/1388/annex/I (the official version)
Page: https://openlegislation.uk/eu-regulation-2016-1388/annex-I
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.