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Are your transformers compliant with the EU Directive?

EU Eco design Regulations –  (Transformer Losses Tier 1 / Tier 2)

The EU Eco Design regulation for transformer losses Tier 2 will take effect from 1st July 2021 replacing Tier 1 regulations.

Tier 2 specifications for transformer losses aspire to reduce the energy waste by 10% compared to Tier 1 (2015) levels.

The European Commission estimates that 2.9% of all energy generated across EU26 and the UK is wasted through transformer losses. This amounts to 93TWh which is equivalent to the electricity consumed in a country the size of Denmark over three years.

The latest regulation applies to all transformers placed in the market or put into service in the UK and the EU. Commission Regulation (EU) No 548/2014 and Amendment (EU) 2019/17832 lay out Tier 2 requirements for transformers with a minimum power rating of 1 kVA used in 50 Hz electricity transmission and distribution networks or for industrial applications.

The strict design regulation aims to reduce energy losses of distribution transformers to save on average 16TWh annually which equate to 3.7MtCO2 from being emitted into the atmosphere.

Download our transformer comparison chart here: Bowers Tiers 2 Energy / Waste / Cost savings leaflet.


Q: What does the Ecodesign legislation mean for my business?

A: The regulation is only applicable to transformers purchased after the entry into force of the Regulation. However, there may be some confusion regarding the definitions of “purchase” and the actual date of “entry into force”. According to the regulation, “purchase refers to the act of contracting with the manufacturer for the delivery of a given volume of transformers”.

Q: When is the best time to commission a new transformer 

A: From the 1st July 2021, Bowers Electricals Ltd (and other manufacturers and importers) will not have the right to supply Tier 1 transformers, even if a contract has been signed before that date. If the delivery date is after 1st July 2021, the transformer must conform to EU Tier 2 losses.

Your countries regulation authorities may request any Factory Acceptance Tests (FATs) at any time to verify test results comply with Tier 2 regulations.

Q: What about the refurbishment market?

A: This aspect is one of several still open to interpretation. To circumvent much of the confusion regarding implementation of the directive, the executive body of the European Union has commissioned an Implementation Guide for the Eco-design Regulation on Transformers which, although not be legally binding, can nevertheless be used as a guidance document. As part of Bowers’ presence at Sustainability Live, the team is inviting interested parties to book free one-to-one consultations about any aspect of the Ecodesign legislation and how it may affect their business.

Q: Why should I choose Bowers over another transformer manufacturer?

A: Bowers Electricals designs and manufactures here in the UK, supporting local businesses while maintaining a competitive edge against manufacturers who import their products from outside Europe. Bowers is a family-owned business that prides itself on offering excellent customer service while being noted for the ability and flexibility to provide top-quality, bespoke engineering solutions for each client. We regularly contribute our expertise to British and European Standards Committees and Working Groups, ensuring that we are fully aware of current and future developments in the marketplace. With Bowers you can not only be confident of getting the best value for money, but of finding the solution you need – not one you have to work around.

If you are still unsure about how the Ecodesign regulations will affect you, or would like advice on what products could be most financially and environmentally beneficial for your business, get in touch.

To arrange an appointment, contact the team on 01773 531531 or email

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