Division 2 Minimum energy efficiency requirements for large power transformersF1

Minimum efficiency requirements for large power transformers are set out in Tables I.7, I.8 and I.9.

There may be specific instances where the replacement of an existing transformer, or the installation of a new one, meeting the applicable minimum requirements set out in Tables I.7, I.8 and I.9 would result in disproportionate costs. As general rule, costs can be considered to be disproportionate when the extra transportation and/or installation costs of a Tier 2 or Tier 1, as applicable, compliant transformer would be higher than the net present value of the additional avoided electricity losses (tariffs, taxes and levies excluded) over its normally expected service life. This net present value shall be calculated based on capitalised loss values using widely accepted social discount rates ^f1 .

In those cases, the following fall-back provisions apply:

As of the date of application of Tier 2 requirements ( 1 July 2021 ), when the one-to-one replacement of a large power transformers in an existing site entails disproportionate costs associated to its transportation and/or installation, or is technically infeasible, the replacement transformer is, exceptionally, only required to comply with Tier 1 requirements for the given rated power.

Furthermore, if the cost of installing a replacement transformer complying with Tier 1 requirements are also disproportionate, or where no technically feasible solutions exist, no minimum requirements shall apply to the replacement transformer.

As of the date of application of Tier 2 requirements ( 1 July 2021 ), when the installation of a new large power transformer in a new site entails disproportionate costs associated to their transportation and/or installation, or is technically infeasible, the new transformer is, exceptionally, only required to meet Tier 1 requirements for the given rated power.

In these cases, the manufacturer, importer or authorised representative responsible for placing on the market or putting into service the transformer shall:

include in the technical documentation of the new or replacement transformer the following information:

• address and contact details of the commissioner of the transformer,

• the specific location where the transformer is to be installed,

• the technical and/or economic justification to install a new or replacement transformer that does not comply with Tier 2 or Tier 1 requirements. If the transformer(s) were commissioned by a tendering process, all the necessary information regarding the analysis of bids and the award decision, shall also be provided,

• notify the competent national market surveillance authorities.

  Table I.7

  Minimum Peak Efficiency Index requirements for liquid immersed large power transformers

  Rated Power (MVA)	Tier 1 ( 1.7.2015 )	Tier 2 ( 1.7.2021 )
  	Minimum Peak Efficiency Index (%)
  ≤ 0,025	97,742	98,251
  0,05	98,584	98,891
  0,1	98,867	99,093
  0,16	99,012	99,191
  0,25	99,112	99,283
  0,315	99,154	99,320
  0,4	99,209	99,369
  0,5	99,247	99,398
  0,63	99,295	99,437
  0,8	99,343	99,473
  1	99,360	99,484
  1,25	99,418	99,487
  1,6	99,424	99,494
  2	99,426	99,502
  2,5	99,441	99,514
  3,15	99,444	99,518
  4	99,465	99,532
  5	99,483	99,548
  6,3	99,510	99,571
  8	99,535	99,593
  10	99,560	99,615
  12,5	99,588	99,640
  16	99,615	99,663
  20	99,639	99,684
  25	99,657	99,700
  31,5	99,671	99,712
  40	99,684	99,724
  50	99,696	99,734
  63	99,709	99,745
  80	99,723	99,758
  100	99,737	99,770
  125	99,737	99,780
  160	99,737	99,790
  ≥ 200	99,737	99,797

Minimum PEI values for MVA ratings that fall in between the ratings given in Table I.7 shall be calculated by linear interpolation

Minimum PEI values for MVA ratings that fall in between the ratings given in Table I.8 shall be calculated by linear interpolation

Minimum PEI values for MVA ratings that fall in between the ratings given in Table I.9 shall be calculated by linear interpolation.