Regulation (EU) No 548/2014 relates to the correct implementation of Directive 2009/125/EC with regard to small, medium and large power transformers.

The EU Taxonomy requires transformers to comply with Tier 2 requirements as of July 2021, which have been outlined in Annex I of the Regulation.

To find out easily what those requirements are, please find the relevant table to the exact type of transformer you provide:

1) Table 1: Requirements for three-phase medium power transformers with rated power ≤ 3 150 kVA

2) Table 2: Requirements for medium power transformers with rated power > 3 150 kVA

The levels of load and no-load losses indicated in Table 1 are not applicable to liquid immersed pole-mounted transformers with power ratings between 25 kVA and 315 kVA.

For these specific models of medium power pole-mounted transformers, the maximum levels of allowable losses are set out in Table 3 below.

3) Table 3: Maximum load and no-load losses (in W) for medium power liquid immersed pole-mounted transformers

4) Table 4: Minimum energy efficiency requirements for large power transformers