{
  "url": "https://openlegislation.uk/eu-regulation-2014-548/annex-I/division-1/division-1.2",
  "json_url": "https://openlegislation.uk/eu-regulation-2014-548/annex-I/division-1/division-1.2.json",
  "legislation": "eur/2014/548",
  "legislation_title": "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",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2014-548",
  "path": "annex/I/division/1/division/1.2",
  "kind": "division",
  "number": "1.2",
  "heading": "Requirements for medium power transformers with rated power > 3 150 kVA",
  "text": "Table I.4: Minimum Peak Efficiency Index (PEI) values for liquid immersed medium power transformers\nRated Power (kVA)\nTier 1 (1 July 2015)\nTier 2 (1 July 2021)\nMinimum Peak Efficiency Index (%)\n3 150 < Sr ≤ 4 000\n99,465\n99,532\n5 000\n99,483\n99,548\n6 300\n99,510\n99,571\n8 000\n99,535\n99,593\n10 000\n99,560\n99,615\n12 500\n99,588\n99,640\n16 000\n99,615\n99,663\n20 000\n99,639\n99,684\n25 000\n99,657\n99,700\n31 500\n99,671\n99,712\n40 000\n99,684\n99,724\nMinimum PEI values for kVA ratings that fall in between the ratings given in Table I.4 shall be calculated by linear interpolation.\nTable I.5: Minimum Peak Efficiency Index (PEI) values for dry type medium power transformers\nRated Power (kVA)\nTier 1 (1 July 2015)\nTier 2 (1 July 2021)\nMinimum Peak Efficiency Index (%)\n3 150 < Sr ≤ 4 000\n99,348\n99,382\n5 000\n99,354\n99,387\n6 300\n99,356\n99,389\n8 000\n99,357\n99,390\n≥ 10 000\n99,357\n99,390\nMinimum PEI values for kVA ratings that fall in between the ratings given in Table I.5 shall be calculated by linear interpolation.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2014/548/annex/I/division/1/division/1.2",
    "retrieved_at": "2026-11-01T14:47:38.642843+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}