# Commission Regulation (EU) 2017/1485 of 2 August 2017 establishing a guideline on electricity transmission system operation (Text with EEA relevance), Article 130: Frequency quality evaluation data

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

1. The frequency quality evaluation data shall be:
(a) for the synchronous area:
(i)the instantaneous frequency data; and
(ii)the instantaneous frequency deviation data;
(b) for each LFC block of the synchronous area, the instantaneous FRCE data.
2. The measurement accuracy of the instantaneous frequency data and of the instantaneous FRCE data, where measured in Hz, shall be 1 mHz or better.

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Source: https://www.legislation.gov.uk/eur/2017/1485/article/130 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1485/article-130
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.