# Commission Regulation (EU) 2016/1447 of 26 August 2016 establishing a network code on requirements for grid connection of high voltage direct current systems and direct current-connected power park modules (Text with EEA relevance), Annex III: Voltage ranges referred to in Article 18

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

Synchronous Area
Voltage Range
Time period for operation
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
Great Britain
0.90 pu-1.10 pu
Unlimited
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
Table 4: Minimum time periods an HVDC system shall be capable of operating for voltages deviating from the reference 1 pu value at the connection points without disconnecting from the network. This table applies in case of pu voltage base values at or above 110 kV and up to (not including) 300 kV.
Synchronous Area
Voltage Range
Time period for operation
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
Great Britain
0.90 pu-1.05 pu
Unlimited
1.05 pu-1.10 pu
15 minutes
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
Table 5: Minimum time periods an HVDC system shall be capable of operating for voltages deviating from the reference 1 pu value at the connection points without disconnecting from the network. This table applies in case of pu voltage base values from 300 kV to 400 kV (included).

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Source: https://www.legislation.gov.uk/eur/2016/1447/annex/III (the official version)
Page: https://openlegislation.uk/eu-regulation-2016-1447/annex-III
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.