EN 50588-1:2015
(Main)Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements
Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements
This European Standard covers medium power transformers. ‘Medium power transformer’ means a power transformer with a highest voltage for equipment higher than 1,1 kV, but not exceeding 36 kV and a rated power equal to or higher than 5 kVA but lower than 40 MVA. National practices may require the use of highest voltages for equipment up to (but not including) 52 kV, when the rated voltage is less than 36 kV (such as Um = 38,5 kV or Um = 40,5 kV). This is considered to be an unusual case of a large power transformer, where the requirements are those for a medium power transformer with Um = 36 kV. NOTE 1 ‘Large power transformer’ means a power transformer with a highest voltage for equipment exceeding 36 kV and a rated power equal or higher than 5 kVA, or a rated power equal to or higher than 40 MVA regardless of the highest voltage for equipment. Large power transformers are in the scope of EN 50629. NOTE 2 Transformers with tap changer (DETC or OLTC) are included in this European Standard even if they have separate tapping winding. The object of this European Standard is to set up requirements related to electrical characteristics and design of medium power transformers. The following transformers are excluded from this European Standard: - instrument transformers, specifically designed to supply measuring instruments, meters, relays and other similar apparatus; - transformers with low-voltage windings specifically designed for use with rectifiers to provide a DC supply; - transformers specifically designed to be directly connected to a furnace; - transformers specifically designed for offshore applications and floating offshore applications; - transformers specially designed for emergency installations; - transformers and auto-transformers specifically designed for railway feeding systems; - 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; - starting transformers, specifically designed for starting three-phase induction motors so as to eliminate supply voltage dips; - testing transformers, specifically designed to be used in a circuit to produce a specific voltage or current for the purpose of testing electrical equipment; - welding transformers, specifically designed for use in arc welding equipment or resistance welding equipment; - transformers specifically designed for explosion-proof and underground mining applications, - transformers specifically designed for deep water (submerged) applications; - medium Voltage (MV) to Medium Voltage (MV) interface transformers up to 5 MVA; - large power transformers where it is demonstrated that for a particular application, technically feasible alternatives are not available to meet the minimum efficiency requirements set out by the commission regulation (EU) No 548/2014; - large power transformers which are like for like replacements in the same physical location/installation for existing large power transformers, where this replacement cannot be achieved without entailing disproportionate costs associated to their transportation and/or installation.
Mittelleistungstransformatoren 50 Hz, mit einer höchsten Spannung für Betriebsmittel nicht über 36 kV - Teil 1: Allgemeine Anforderungen
Transformateurs 50 Hz de moyenne puissance, de tension la plus élevée pour le matériel ne dépassant pas 36 kV - Partie 1: Exigences générales
Močnostni transformatorji srednje moči 50 Hz z najvišjo napetostjo naprave do 36 kV - 1. del: Splošne zahteve
Ta evropski standard zajema srednje transformatorje. »Srednji transformator« označuje transformator z najvišjo napetostjo za opremo, ki je višja od 1,1 kV, vendar ne presega 36 kV, in z nazivno močjo, enako ali višjo od 5 kVA, ki pa ne presega 40 MVA. Nacionalne prakse morda zahtevajo uporabo najvišjih napetosti za opremo do (toda ne vključno z) 52 kV, ko je nazivna napetost nižja od 36 kV (kot na primer Um = 38,5 kV ali Um = 40,5 kV). Gre za nenavaden primer velikonapetostnega transformatorja z zahtevami za srednjenapetostni transformator z Um = 36 kV.
OPOMBA 1 »Veliki transformator« označuje transformator z najvišjo napetostjo za opremo, ki je višja od 36 kV in nazivno močjo, enako ali višjo od 5 kVA, ali nazivno močjo, enako ali višjo od 40 MVA, ne glede na najvišjo napetost za opremo. Veliki transformatorji spadajo v področje uporabe standarda EN 50629.
OPOMBA 2 Transformatorji z odcepnim preklopnikom (DETC ali OLTC) so vključeni v ta evropski standard, čeprav imajo ločeno navitje odcepa.
Cilj tega evropskega standarda je določanje zahtev v zvezi z električnimi značilnostmi in izdelavo srednjih transformatorjev. Ta evropski standard ne zajema naslednjih transformatorjev:
– instrumentnih transformatorjev, ki so posebej izdelani za napajanje merilnih instrumentov, metrov, relejev in drugih podobnih aparatov;
– transformatorjev z nizkonapetostnimi navitji, ki so posebej izdelani za uporabo z usmerniki za izmenično napajanje;
– transformatorjev, ki so posebej izdelani za neposredno priključitev na peč;
– transformatorjev, ki so posebej izdelani za uporabo na morju in na plavajočih objektih;
– transformatorjev, ki so posebej izdelani za zasilne naprave;
– transformatorjev in avtotransformatorjev, ki so posebej izdelani za sisteme za napajanje železniških naprav;
– ozemljitvenih transformatorjev, tj. trifaznih transformatorjev za zagotavljanje nevtralne točke za namene ozemljitve sistema;
– transformatorjev vleke, nameščenih na železniška vozila, tj. transformatorjev, ki so neposredno ali prek pretvornika povezani na enosmerni ali izmenični kontaktni vodnik in se uporabljajo na stabilnih napravah ali železniških napravah;
– zagonskih transformatorjev, ki so posebej izdelani za zagon trifaznih asihronskih motorjev z namenom preprečevanja napetostnih upadov;
– preskusnih transformatorjev, ki so posebej izdelani za uporabo v tokokrogu z namenom proizvajanja določene napetosti ali toka za preskušanje električne opreme;
– varilnih transformatorjev, ki so posebej izdelani za uporabo v opremi za obločno ali uporovno varjenje;
– transformatorjev, ki so posebej izdelani za uporabo v protieksplozijskem ali podzemnem okolju;
– transformatorjev, ki so posebej izdelani za uporabo v globoki vodi (podvodna uporaba);
– srednjenapetostnih (MV) do srednjenapetostnih (MV) vmesniških transformatorjev do 5 MVA;
– velikih transformatorjev, kjer je prikazano, da za določeno uporabo tehnično možne alternative, ki bi dosegle minimalne zahteve glede učinkovitosti, ki jih določa uredba komisije (EU) št. 548/2014:
– velikih transformatorjev, ki so možne zamenjave za obstoječe velike transformatorje v istih fizičnih lokacijah/napravah, v primeru da zamenjava slednjih ni mogoča brez nesorazmernih stroškov, ki bi nastali zaradi njihovega prevoza in/ali namestitve.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2015
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SIST EN 50464-1:2007
SIST EN 50464-1:2007/A1:2012
SIST EN 50541-1:2011
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Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36
kV - Part 1: General requirements
Mittelleistungstransformatoren 50 Hz, mit einer höchsten Spannung für Betriebsmittel
nicht über 36 kV - Teil 1: Allgemeine Anforderungen
Transformateurs 50 Hz de moyenne puissance, de tension la plus élevée pour le
matériel ne dépassant pas 36 kV - Partie 1: Exigences générales
Ta slovenski standard je istoveten z: EN 50588-1:2015
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 50588-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2015
ICS 29.180 Supersedes EN 50464-1:2007, EN 50541-1:2011
English Version
Medium power transformers 50 Hz, with highest voltage for
equipment not exceeding 36 kV - Part 1: General requirements
Transformateurs 50 Hz de moyenne puissance, de tension Mittelleistungstransformatoren 50 Hz, mit einer höchsten
la plus élevée pour le matériel ne dépassant pas 36 kV - Spannung für Betriebsmittel nicht über 36 kV - Teil 1:
Partie 1: Exigences générales Allgemeine Anforderungen
This European Standard was approved by CENELEC on 2015-06-25. 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, 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
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50588-1:2015 E
Contents
Foreword .4
1 Scope .5
2 Normative references .6
3 Terms and definitions .6
4 Environmental classes .7
5 Electrical characteristics .7
5.1 Highest voltages for equipment for winding with U > 1,1 kV .7
m
5.2 Rated voltage for winding with U ≤ 1,1 kV .7
m
5.3 Tapping .8
5.4 Connection designations for three phase transformers .8
6 Load loss, no load loss, PEI, sound power level, short-circuit impedance .8
6.1 General .8
6.2 Transformers with rated power S ≤ 3 150 kVA .9
r
6.2.1 General information .9
6.2.2 One winding with U ≤ 24 kV and the other one with U ≤ 1,1 kV . 10
m m
6.2.3 Load loss and no load loss in case of other insulation level . 12
6.2.4 Load loss and no load loss in case of dual voltage . 12
6.3 Transformers with rated power 3 150 kVA < S < 40 000 kVA . 13
r
6.4 Transformers with special requirements . 14
6.4.1 Rated power not included in the list . 14
6.4.2 Transformers equipped with tapping connections suitable for operation
while transformer is energised or on load and rated power S
r
≤ 3 150 kVA . 14
6.4.3 Liquid immersed pole mounted transformers . 15
6.4.4 PEI values for single-phase liquid immersed transformers with
Sr ≤ 100 kVA . 16
7 Tolerances . 16
7.1 Tolerances during factory acceptance tests . 16
7.1.1 General . 16
7.1.2 Transformers subject to maximum losses . 16
7.1.3 Transformers subject to minimum PEI . 16
7.2 Tolerances for Market surveillance . 16
7.2.1 Acceptance criteria . 16
7.2.2 Transformers subjected to max losses . 17
7.2.3 Transformers subjected to PEI . 17
7.3 Uncertainties for market surveillance verification . 17
8 Rating plate. 18
9 Tests . 18
9.1 Routine tests . 18
9.2 Type tests . 18
9.3 Special tests . 18
9.4 Special test for corrugated tank . 18
9.4.1 General information . 18
9.4.2 Temperature variation . 18
9.4.3 Sealing temperature . 19
9.4.4 Calculation of the volume variation . 19
9.4.5 Test procedure . 19
9.5 Other technologies with level of no load loss AAA . 20
10 Design requirements . 20
10.1 Liquid immersed transformers . 20
10.1.1 Type of liquid preservation system and degree of sealing . 20
10.1.2 Terminal markings . 20
10.1.3 Terminations . 21
10.1.4 Distance between bushings . 21
10.1.5 Rollers . 21
10.2 Dry-type transformers . 21
10.2.1 Terminals . 21
10.2.2 Enclosure . 21
11 Accessories . 22
11.1 Liquid immersed transformers . 22
11.2 Dry-type transformers . 22
Annex A (informative) Calculation of PEI and k . 24
PEI
A.1 Calculation of Peak Efficiency Index. 24
A.2 Calculation of k . 24
PEI
Annex ZZ (informative) Relationship between this European Standard and the
requirements of Commission Regulation (EC) No 548/2014 of 21 May 2014 on
implementing Directive 2009/125/EC of the European Parliament and of the Council
with regard to small, medium and large power transformers . 26
Bibliography . 29
Foreword
This document (EN 50588-1:2015) has been prepared by CLC/TC 14 "Power transformers".
The following dates are fixed:
- latest date by which this document has
(dop) 2016-06-25
to be implemented at national level by
publication of an identical national
standard or by endorsement
- latest date by which the national
(dow) 2018-06-25
standards conflicting with this
document have to be withdrawn
This document supersedes EN 50464-1:2007 and EN 50541-1:2011.
EN 50464-1:2007 and EN 50541-1:2011:
- both liquid filled and dry-type transformers are covered in the same document;
- the scope of applicability is extended in terms of rated power;
- new values of no load loss, load loss and sound power level for different values of rated
power are specified;
- for transformers having rated power above 3 150 kVA, the concept of Peak Efficiency Index
is introduced.
Attention is drawn to the possibility that some of the elements of this document may be the subject
of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This document has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association, and supports requirements of Commission
Regulation (EC).
For the relationship with requirements of Commission Regulation (EC) see informative Annex ZZ,
which is an integral part of this document.
1 Scope
This European Standard covers medium power transformers. ‘Medium power transformer’ means a
power transformer with a highest voltage for equipment higher than 1,1 kV, but not exceeding 36 kV
and a rated power equal to or higher than 5 kVA but lower than 40 MVA.
National practices may require the use of highest voltages for equipment up to (but not including)
52 kV, when the rated voltage is less than 36 kV (such as U = 38,5 kV or U = 40,5 kV). This is
m m
considered to be an unusual case of a large power transformer, where the requirements are those
for a medium power transformer with U = 36 kV.
m
NOTE 1 ‘Large power transformer’ means a power transformer with a highest voltage for equipment
exceeding 36 kV and a rated power equal or higher than 5 kVA, or a rated power equal to or higher than
40 MVA regardless of the highest voltage for equipment. Large power transformers are in the scope of
EN 50629.
NOTE 2 Transformers with tap changer (DETC or OLTC) are included in this European Standard even if
they have separate tapping winding.
The object of this European Standard is to set up requirements related to electrical characteristics
and design of medium power transformers.
The following transformers are excluded from this European Standard:
- instrument transformers, specifically designed to supply measuring instruments, meters,
relays and other similar apparatus;
- transformers with low-voltage windings specifically designed for use with rectifiers to
provide a DC supply;
- transformers specifically designed to be directly connected to a furnace;
- transformers specifically designed for offshore applications and floating offshore
applications;
- transformers specially designed for emergency installat
...
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