Division (1) Annex I is amended as follows:

point 1 is amended as follows:

1. (i)

   the title of Table I.1 is replaced as follows:

   ‘Maximum load and no-load losses (in W) for three-phase liquid-immersed medium power transformers with one winding with U_m ≤ 24kV and the other with U_m ≤ 3,6 kV’;

2. (ii)

   the title of Table I.2 is replaced as follows:

   ‘Maximum load and no-load losses (in W) for three-phase dry-type medium power transformers with one winding with Um ≤ 24kV and the other with Um ≤ 3,6 kV’;

3. (iii)

   the following paragraphs are added after the first paragraph:

   ‘As of the date of application of Tier 2 requirements (1 July 2021), when the one-to-one replacement of an existing medium power transformer entails disproportionate costs associated with their installation, the replacement transformer is, exceptionally, only required to meet Tier 1 requirements for the given rated power.

   In this respect, installation costs are disproportionate if the costs of the replacement of the complete substation housing the transformer and/or the acquisition or rental of additional floor space are higher than the net present value of the additional avoided electricity losses (tariffs, taxes and levies excluded) of a Tier 2 compliant replacement transformer over its normally expected service life. The net present value shall be calculated based on capitalised loss values using widely accepted social discount rates^f1.

   In this case, the manufacturer, importer, or authorised representative shall include in the technical documentation of the replacement transformer the following information:

   • Address and contact details of the commissioner of the replacement transformer

   • The station where the replacement transformer is to be installed. This shall be unequivocally identified by either a specific location or a specific installation type (e.g., station or cabin model)

   • The technical and/or economic justification of the disproportionate cost to install a transformer that is only Tier 1 compliant instead of a Tier 2 compliant one. If the transformers(s) were commissioned by a tendering process, all the necessary information regarding the analysis of bids and the award decision shall be provided.

   In the above cases, the manufacturer, importer or authorised representative shall notify the competent national market surveillance authorities.’;

4. (iv)

   Table I.3 is replaced by Tables I.3a and I.3b as follows:

   ‘

   Table I.3a

   Correction factors to be applied to the load and no load losses indicated in Tables I.1, I.2 and I.6 for medium power transformers with special combinations of winding voltages (for rated power ≤ 3 150 kVA)

   Special combination of voltages in one winding		Load losses (Pk)	No load losses (Po)
   For both liquid immersed (Table I.1) and dry type (Table I.2)		No correction	No correction
   Primary highest voltage for equipment Um ≤ 24kV	Secondary highest voltage for equipment Um > 3,6 kV
   For liquid immersed (Table I.1)		10 %	15 %
   Primary highest voltage for equipment Um = 36kV	Secondary highest voltage for equipment Um ≤ 3,6 kV
   Primary highest voltage for equipment Um = 36kV	Secondary highest voltage for equipment Um > 3,6 kV	10 %	15 %
   For dry type (Table I.2)		10 %	15 %
   Primary highest voltage for equipment Um = 36kV	Secondary highest voltage for equipment Um ≤ 3,6 kV
   Primary highest voltage for equipment Um = 36kV	Secondary highest voltage for equipment Um > 3,6 kV	15 %	20 %

   Table I.3b

   Correction factors to be applied to the load and no load losses indicated in Tables I.1, I.2 and I.6 for medium power transformers with dual voltage in one or both windings differing more than 10 % and rated power ≤ 3 150 kVA.

   The losses shall be calculated on the base of the voltage of the winding specified in the second column and can be increased with the correction factors given in the last 2 columns. In any case, whatever the combinations of winding voltages, the losses cannot exceed the values given in Tables I.1, I.2 and I.6 corrected by the factors in this table.
   Type of dual voltage	Reference voltage for the application of correction factors	Load losses (Pk)f2	No load losses (Po)
   Dual voltage on one winding with reduced power output on the lower low-voltage winding AND maximum available power on the lower voltage of the low-voltage winding limited to 0,85 of the rated power assigned to the low-voltage winding at its higher voltage.	losses shall be calculated based on the higher voltage of the low-voltage winding	No correction	No correction
   Dual voltage on one winding with reduced power output on the lower high-voltage winding AND maximum available power on the lower voltage of the high-voltage winding limited to 0,85 of the rated power assigned to the high-voltage winding at its higher voltage.	losses shall be calculated based on the higher voltage of the high-voltage winding	No correction	No correction
   Dual voltage on one winding AND full rated power available on both windings, i.e., the full nominal power is available regardless of the combination of voltages.	The losses shall be calculated based on the higher voltage of the dual voltage winding	10 %	15 %
   Dual voltage on both windings AND rated power available on all combinations of windings, i.e., both voltages on one winding are fully rated in combination with one of the voltages on the other winding	the losses shall be calculated based on the higher voltages of both dual voltage windings	20 %	20 %

   ’;

in point 1.4, the first paragraph is replaced as follows:

‘1.4.

For the one-to-one replacement of existing medium power pole-mounted transformers with power ratings between 25 kVA and 400 kVA, the applicable maximum levels of load and no-load losses are not the ones in Tables I.1 and I.2, but those in Table I.6 below. Maximum allowable losses for kVA ratings other than those explicitly mentioned in Table I.6 shall be obtained by linear interpolation or extrapolation. The correction factors for special combinations of winding voltages indicated in Tables I.3a and I.3b are also applicable.

For the one-to-one replacement of existing medium power pole-mounted transformers, the manufacturer, importer or authorised representative shall include in the technical documentation of the transformer the following information:

• the address and contact details of the commissioner of the replacement transformer;

• the station where the replacement transformer is to be installed. This shall be unequivocally identified either by a specific location or an specific installation type (e.g. technical description of the pole).

In the above cases, the manufacturer, importer or authorised representative shall notify the competent national market surveillance authorities.

With regard to the installation of new pole-mounted transformers, it is the requirements in Tables I.1 and I.2, in conjunction with Tables I.3a and I.3b where justified, which are applicable.’;

point 2 is replaced by the following:

‘2.

Minimum energy efficiency requirements for large power transformers

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^f3.

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

Table I.8

Minimum Peak Efficiency Index requirements for dry-type large power transformers with Um ≤ 36kV

Rated Power (MVA)	Tier 1 (1.7.2015)	Tier 2 (1.7.2021)
	Minimum Peak Efficiency Index (%)
3,15 < Sr ≤ 4	99,348	99,382
5	99,354	99,387
6,3	99,356	99,389
8	99,357	99,390
≥ 10	99,357	99,390

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

Table I.9

Minimum Peak Efficiency Index requirements for dry-type large power transformers with Um > 36kV

Rated Power (MVA)	Tier 1 (1.7.2015)	Tier 2 (1.7.2021)
	Minimum Peak Efficiency Index (%)
≤ 0,05	96,174	96,590
0,1	97,514	97,790
0,16	97,792	98,016
0,25	98,155	98,345
0,4	98,334	98,570
0,63	98,494	98,619
0,8	98,677	98,745
1	98,775	98,837
1,25	98,832	98,892
1,6	98,903	98,960
2	98,942	98,996
2,5	98,933	99,045
3,15	99,048	99,097
4	99,158	99,225
5	99,200	99,265
6,3	99,242	99,303
8	99,298	99,356
10	99,330	99,385
12,5	99,370	99,422
16	99,416	99,464
20	99,468	99,513
25	99,521	99,564
31,5	99,551	99,592
40	99,567	99,607
50	99,585	99,623
≥ 63	99,590	99,626

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

in point 3, the last subparagraph is replaced by:

‘For medium and large power transformers only, the information under (a); (c) and (d) shall also be included on the rating plate of the transformer.’;

in point 4, the last paragraph is deleted,

and a new point (d) is added as follows:

1. (d)

   ‘the specific reason(s) why transformers are considered to be exempted from the Regulation in accordance with Article 1.2’;