Energy efficient transformer solutions European Minimum Energy Performance Standard (MEPS)
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Transformers Energy efficient transformer solutions European Minimum Energy Performance Standard (MEPS)
2 European MEPS for transformers
The EU MEPS
(European Minimum Energy Performance Standard)
Transformers have Introduction
The EU MEPS (European Minimum Energy Performance
been identified as Standard) sets a mandatory minimum efficiency level for
transformers introduced into European market.
one of the ERP priority The EcoDesign Directive 2009/125/EC of the European
groups with considerable Parliament establishes a framework to set Ecodesign
requirements for energy-related products (ERPs). Transformers
energy saving potential. have been identified as one of the ERP priority groups with
considerable energy saving potential. Within EU28 the total
Within 28 member losses originating from an existing fleet of transformers
states of the European amounts to approximately 100 TWh annually. This corresponds
40 Mt of CO2 emissions.
Union the total losses For implementing the directive with regard to transformers,
originating from the European Commission has set as a legal framework
an existing fleet the regulation No 548/2014 which states the minimum
efficiency levels of transformers. The aim of the regulation is
of transformers amounts to prevent non-efficient products from being placed into the
European market. The regulation is binding in it´s entirety and
to approximately directly applicable in all EU281.
100 TWh annually.
This corresponds
40 Mt of CO2 emissions.
1 ountries of the European Economic Area (Norway, Iceland, Liechtenstein) have
C
committed to implement the same or very similar minimum efficiency standards set
by EU Ecodesign regulations through national legislation. Other closely associated
countries like Switzerland have in the past also transposed EU Ecodesign
requirements.
European MEPS for transformers 3
4 European MEPS for transformers
Scope – starting transformers, specifically designed for starting
EU MEPS covers both, dry-type and liquid-filled distribution three-phase induction motors so as to eliminate supply
transformers as well as power transformers with a minimum voltage dips,
power rating of 1 kVA used in electricity transmission and – testing transformers, specifically designed to be used
distribution networks or in industrial applications. in a circuit to produce a specific voltage or current for
theźpurpose of testing electrical equipment,
There are some special installations and applications – welding transformers, specifically designed for use in arc
of transformers that are exempted from the regulation. welding equipment or resistance welding equipment,
Transformers specifically designed and used in applications – transformers specifically designed for explosion-proof and
such as the following are excluded: underground mining applications,
– instrument transformers, specifically designed to supply – transformers specifically designed for deep water
measuring instruments, meters, relays and other similar (submerged) applications,
apparatus, – medium voltage (MV) to medium voltage (MV) interface
– transformers with low-voltage windings specifically transformers up to 5 MVA,
designed for use with rectifiers to provide a DC supply, – large power transformers where it is demonstrated that for
– transformers specifically designed to be directly a particular application, technically feasible alternatives are
connected to a furnace, not available to meet the minimum efficiency requirements
– transformers specifically designed for offshore set out by this Regulation,
applications and floating offshore applications, – large power transformers which are like for like
– transformers specially designed for emergency replacements in the same physical location/installation for
installations, existing large power transformers, where this replacement
– transformers and auto-transformers specifically cannot be achieved without entailing disproportionate costs
designed for railway feeding systems, associated to their transportation and/or installation.
– earthing or grounding transformers, this is, three-phase
transformers intended to provide a neutral point for system
grounding purposes,
– traction transformers mounted on rolling stock, this
is, transformers connected to an AC or DC contact line,
directly or through a converter, used in fixed installations
of railway applications,
European MEPS for transformers 5
Frequently asked questions
Are manufacturers allowed to produce transformers with to be non-compliant and thus cannot be delivered to the
lower efficiency than required in the regulation? European market.
Transformers not compliant with the regulation may no longer
be placed in the European market (EU28-countries and Iceland, For the verification measurements conducted by the
Liechtenstein, Norway) as of July 1, 2015. Switzerland is expected surveillance authorities, there is a 5 percent tolerance.
to adopt the same requirements. By then all new transformers However, this tolerance shall not be used by the manufacturer
need to meet the “Tier 1” minimum efficiency requirements of the of importer as an allowed tolerance.
regulation (except the specific special transformers / installations
which are exempted from the regulation). How can I be sure that a transformer is compliant?
All the transformers will have to bear a CE-marking as a sign
However, the regulations do not apply outside Europe. of compliancy with the prevailing directives. An easy way
Therefore, it will be possible for manufacturers in Europe to verify the compliancy is by checking whether the transformer
to produce low efficiency transformers with high energy losses has the appropriate marking on the main rating plate.
for markets that do not have minimum efficiency requirements. The manufacturers will also have a responsibility of making a
duly signed EC Declaration of Conformity document available.
Do I, as a customer, have to specify in my inquiry documents
that the transformer needs to meet the minimum efficiency As a customer, I have been utilizing capitalization values for
requirements? the transformer losses in my inquiry and tender evaluations.
No, this is not necessary. It is primarily the manufacturer’s Should I continue to do so despite the regulation?
responsibility to ensure that the transformers are compliant Yes, you should continue to do so. The regulation is only for
with the regulation. Producing or importing a non-compliant setting a minimum floor level for the transformer efficiency.
transformer into European market is illegal beginning July 1, Total Cost of Ownership method (TCO) is used to minimize
2015. However, especially during the transition period, it may the investment required to obtain the greatest energy savings
be recommended to make reference to the regulation as the for the least cost. This results in the selection of transformers
minimum required efficiency level. whose losses are economically optimal for the given need /
case.
Is there a tolerance for exceeding the MEPS values?
No, there is no tolerance. If the loss values exceed the The regulation will only define a constraint for the losses.
requirements of the regulation, the transformer is considered The manufacturer should provide an offer with optimized loss
6 European MEPS for transformers
The transition period from
the regulation coming into force
(June 2014) until July 1, 2015
is effectively acting as a grace
period allowing the industry and
the market to adapt.
values that may be lower than the maximum value defined by
the regulation.
Is it possible to procure transformers now that meet the
“Tier 2” requirements scheduled to become mandatory
July 1, 2021?
Yes it is. A customer may make reference to the “Tier 2”-level
of the regulation in his inquiry. ABB can produce products
today that meet “Tier 2” requirements as well as products with
efficiencies beyond future minimum levels.
However, when talking about the “Tier-2”-levels, it should be
noted that the European Commission will conduct a “mid-
term” assessment for the regulation latest during the year 2017
where “Tier-2” requirement levels will be reviewed and may be
amended.
Is there a grace period after July 1, 2015?
No. In fact the transition period from the regulation coming
into force (June 2014) until July 1, 2015 is effectively acting
as a grace period allowing until the industry and the market to
adapt.
European MEPS for transformers 7
ABB transformer solutions – available today
Timeline Transformers with rating up to 3150 kVA and nominal voltage
October 21, 2009 EU adopted revised “Ecodesign Directive” up to and including 36 kV
(2009/125/EC) for Energy-related The maximum allowed loss levels for transformers with ratings
products – establishing a framework up to and including 3150 kVA are based on the classification
to be complemented by “implementing of the EN standards 50464-1:2007 and 50541-1:2011.
measures” (E.Q. regulations on individual Note: These EN standards are currently being united and
products and systems) revised to support the regulation more directly. Lower efficiency
June 11, 2014 EU commission adopted a regulation to classes than in the EU MEPS will disappear completely.
apply the defined Ecodesign requirements
on transformers and the regulation Liquid-filled distribution transformers with one winding
548/2014 entered into force with Um
Concessions for transformers with voltages differing
from the above defined
Ref Insulation level Correction of load lossses
and no load losses
1 One winding with Maximum levels of losses indicated in
Um ≤ 24 kV and tables can be increased by 10% for no
the other with Um > 1.1 kV load losses and by 10% for load losses
2 One winding with Maximum levels of losses indicated in
24 kV < Um ≤ 24 kV and tables can be increased by 15% for no
the other with Um > 1.1 kV load losses and by 10% for load losses
3 One winding with Maximum levels of losses indicated in
24 kV < Um ≤ 36 kV and tables can be increased by 20% for no
the other with Um > 1.1 kV load losses and by 15% for load losses
The regulation defines also concession for transformers with
dual voltage windings.
Transformers with rating >3150 kVA
and/or nominal voltage >36 kV
For the transformers with higher rating than 3150 kVA, an
index called Peak Efficiency Index (PEI) is introduced. The
methodology for calculating the PEI is based on the ratio of
the transmitted apparent power of a transformer minus the
electrical losses to the transmitted apparent power of the
transformers:
2(P0+Pc0)
PEI = 1–
P0+Pc0
Sr
Pk
P0 is the no load losses measure at rated voltage and rated
frequency, on the rated tap
Pc0 is the electrical power required by the cooling system for no
load operation
Pk is the measured load loss at rated current and rated
frequency on the rated tap corrected to the reference
temperature
Sr is the rated power of the transformer or autotransformer on
which Pk is based
PEI represents a highest value
of efficiency index that can be achieved
at the optimum value of loading factor.
European MEPS for transformers 9
The regulation lists minimum allowed values of peak efficiency In addition EU MEPS lists information that has to be shown
index for dry type transformers up to 10000 kVA and for liquid- in transformers documentation.
-filled transformers up to indefinite rating.
ABB and EU MEPS
Example (Liquid-filled transformer): ABB has been in the energy business for 130 years and
Tier 1 Tier 2 offers a full range of transformer products compliant with
25 MVA 99,657 99.700 the requirements available.
Markings and documentation Our technologies are used along the entire energy value chain
Beginning July 1, 2015, the following product information in both the utility and the industrial sectors. ABB enables
requirements for transformers not exempted from the scope customers to maximize the value of energy used to improve
of the regulation must be shown on the rating plate in addition their competitiveness while reducing environmental impact
to the EN 60076-1 requirements: and enhancing sustainability. Solutions from ABB can help
– The values and the name of the classes of no load loss and customers achieve:
load loss for transformers ≤ 3150 kVA – Reduced energy costs
– For transformers > 3150 kVA the PEI – Reduced greenhouse gas emissions
– Information on the weight of all the main components – Reduced need for additional generating capacity
of a transformer (including at least the conductor, the nature
of the conductor and the core material) Energy efficiency improvements can also provide additional
– For pole mounted transformers, a visible display plate operational benefits, such as improved productivity, improved
“For pole-mounted operation only” quality, and reduced maintenance burdens.
As the world market and technology leader in the transformer
A sample rating plate compliant with the new requirements industry, ABB is committed to support customers with
transformer solutions that enhance sustainability. Energy
efficiency is one of the major drivers of our research and
development activity. Today ABB is able to offer transformers
with efficiency levels beyond the second level (“Tier 2”)
of the European regulation scheduled for the year 2021.
The regulation list maximum allowed
losses or minimum allowed values
of peak efficiency index for dry type
transformers up to 10000 kVA and for
liquid-filled transformers up to indefinite
rating.
10 European MEPS for transformersEuropean MEPS for transformers 11
Contact us
ABB Ltd. Note
1LAB 000572
The information contained in this document is for general information purposes
Affolternstrasse, 44
only. While ABB strives to keep the information up to date and correct,
P.O. Box 8131 it makes no representations or warranties of any kind, express or implied,
8050 Zurich, Switzerland about the completeness, accuracy, reliability, suitability or availability with
respect to the information, products, services, or related graphics contained
www.abb.com/transformers in the document for any purpose. Any reliance placed on such information
is therefore strictly at your own risk. ABB reserves the right to discontinue
any product or service at any time.
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