EN 50645:2017

SLOVENSKI STANDARD
01-januar-2018
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Ecodesign requirements for small power transformers
Exigences en matière d’écoconception applicables aux transformateurs de faible
puissance
Ta slovenski standard je istoveten z: EN 50645:2017
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50645
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2017
ICS 29.180
English Version
Ecodesign requirements for small power transformers
Exigences en matière d'écoconception applicables aux Anforderungen an die umweltgerechte Gestaltung von
transformateurs de faible puissance Kleinleistungstransformatoren
This European Standard was approved by CENELEC on 2017-07-31. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50645:2017 E
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General notes on tests . 6
5 Marking and other information . 6
6 No-load loss (P ) . 6
o
7 Load loss (P ) . 7
k
Annex A (normative) Routine tests (production tests) . 8
Annex ZZ (informative) Relationship between this European Standard and the
ecodesign requirements of Commission Regulation (EU) No 548/2014 aimed
to be covered . 9
Bibliography . 10

European foreword
This document (EN 50645:2017) has been prepared by CLC/BTTF 146-1 “Losses of small
transformers: methods of measurement, marking and other requirements related to eco-design
regulation”.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
The following dates are fixed:
• latest date by which this document has to be (dop) 2018–07–31
implemented at national level by publication of
an identical national standard or by endorsement
• latest date by which the national standards (dow) 2020–07–31
conflicting with this document have to
be withdrawn
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s).
For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this
document.
1 Scope
This European Standard gives Ecodesign requirements for small power transformers complying with
the EN 61558 series and in relation to Commission Regulation (EU) N° 548/2014 implementing the
European Directive 2009/125/EC.
This European Standard is applicable to transformers with 50 Hz AC input and output with a rated
power of 1 kVA or more and a voltage lower than 1 kV, except those excluded in the regulation.
For transformers with a voltage between 1 kV and 1,1 kV, this standard may be used as a guide.
2 Normative references
Not applicable.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE Unless otherwise specified, the terms “voltage” and “current” imply the r.m.s. values of alternating
voltage and current.
3.1
(power) transformer
static piece of apparatus with two or more windings which, by electromagnetic induction, transforms a
system of alternating voltage and current into another system of voltage and current usually of
different values and at the same frequency for the purpose of transmitting electrical power
[SOURCE: IEV 421-01-01]
Note 1 to entry: The term frequency also implies that the waveform remains the same.
3.2
short-circuit voltage
voltage to be applied to the input winding, when the windings are at ambient temperature, to produce
in the short-circuited output winding a current equal to the rated output current
Note 1 to entry: The short-circuit voltage is usually expressed as a percentage of the rated supply
voltage.
3.3
rated output current
output current at rated supply voltage, rated supply frequency and rated output voltage, at rated power
factor, assigned to the transformer by the manufacturer for the specified operating conditions of the
transformer
3.4
rated supply voltage
supply voltage (for polyphase supply, the phase-to-phase voltage) assigned to the transformer by the
manufacturer for the specified operating conditions
...