# Commission Regulation (EU) No 548/2014 of 21 May 2014 on implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to small, medium and large power transformers, Division 1.2: Requirements for medium power transformers with rated power > 3 150 kVA

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

Table I.4: Minimum Peak Efficiency Index (PEI) values for liquid immersed medium power transformers
Rated Power (kVA)
Tier 1 (1 July 2015)
Tier 2 (1 July 2021)
Minimum Peak Efficiency Index (%)
3 150 < Sr ≤ 4 000
99,465
99,532
5 000
99,483
99,548
6 300
99,510
99,571
8 000
99,535
99,593
10 000
99,560
99,615
12 500
99,588
99,640
16 000
99,615
99,663
20 000
99,639
99,684
25 000
99,657
99,700
31 500
99,671
99,712
40 000
99,684
99,724
Minimum PEI values for kVA ratings that fall in between the ratings given in Table I.4 shall be calculated by linear interpolation.
Table I.5: Minimum Peak Efficiency Index (PEI) values for dry type medium power transformers
Rated Power (kVA)
Tier 1 (1 July 2015)
Tier 2 (1 July 2021)
Minimum Peak Efficiency Index (%)
3 150 < Sr ≤ 4 000
99,348
99,382
5 000
99,354
99,387
6 300
99,356
99,389
8 000
99,357
99,390
≥ 10 000
99,357
99,390
Minimum PEI values for kVA ratings that fall in between the ratings given in Table I.5 shall be calculated by linear interpolation.

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Source: https://www.legislation.gov.uk/eur/2014/548/annex/I/division/1/division/1.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2014-548/annex-I/division-1/division-1.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.