CLC/TR 50453:2007

Evaluation of electromagnetic fields around power transformers

This Report provides guidance for the evaluation of electromagnetic fields around power transformers. This Report applies to power transformers covered by EN 60076 series with the following characteristics: - apparent rating P: 5 kVA  P  1 000 MVA - insulating level, according to EN 60076-3: • high voltage winding: Um from 7,2 kV to 525 kV • low voltage winding: Um up to 525 kV Reactors are excluded from the present Report. Continuous conducted and radiated emissions are considered for power transformers operating under nominal working conditions of voltage and current. Fault conditions and low occurrence transient events, such as - short-circuits, - lightning and switching transients, - overloads (inrush currents, etc.), - overvoltages, - tap-changer operations, are not considered as normal working conditions. Immunity conditions are considered to ensure the power transformer operates as intended in its normal working environment. The immunity capability of the power transformer is considered for steady state and transient working conditions.

Bewertung von elektromagnetischen Feldern in der Umgebung von Leistungstransformatoren

Evaluation des champs électromagnétiques autour des transformateurs de puissance

Le présent rapport fournit des lignes directrices concernant l’évaluation des champs électromagnétiques autour des transformateurs de puissance. Ce rapport s’applique aux transformateurs couverts par la série EN 60076 avec les caractéristiques suivantes : – caractéristiques apparentes P: 5 kVA  P  1 000 MVA – niveau d’isolement selon EN 60076-3 : • enroulement haute tension: Um de 7,2 kV à 525 kV • enroulement basse tension : Um jusqu’à 525 kV Les réactances sont exclues du présent rapport. Les émissions continues conduites et rayonnées sont prises en compte pour les transformateurs de puissance qui fonctionnent dans les conditions de service nominales de tension et de courant. Les conditions de défaut et les évènements transitoires dont la probabilité est faible, comme – les courts-circuits – les transitoires de foudre et de manœuvre, – les surcharges (courants d’appel, etc), – les surtensions, – le fonctionnement du changeur de prise, ne sont pas considérés comme des conditions normales de service. Les conditions d’immunité sont examinées pour assurer que le transformateur de puissance fonctionne comme prévu dans son environnement de service normal. Les capacités d’immunité du transformateur de puissance sont examinées pour les conditions continues et les conditions de service transitoires.

Ocenitev elektromagnetnih polj okoli elektroenergetskih transformatorjev

General Information

• Status: Published
• Publication Date: 15-May-2007
• ICS: 29.020 - Electrical engineering in general
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: CLC/TC 14 - Power transformers
• Drafting Committee: IEC/TC 14 - IEC_TC_14
• Parallel Committee: IEC/TC 14 - IEC_TC_14
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 16-May-2007
• Completion Date: 16-May-2007
• Mandate: BC-01-87 - BC-01-87
• Ref Project: SIST-TP CLC/TR 50453:2007 - Evaluation of electromagnetic fields around power transformers

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TP CLC/TR 50453:2007
01-september-2007
1DGRPHãþD
SIST R014-001:2001
Ocenitev elektromagnetnih polj okoli elektroenergetskih transformatorjev
Evaluation of electromagnetic fields around power transformers
Bewertung von elektromagnetischen Feldern in der Umgebung von
Leistungstransformatoren
Evaluation des champs électromagnétiques autour des transformateurs de puissance
Ta slovenski standard je istoveten z: CLC/TR 50453:2007
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
SIST-TP CLC/TR 50453:2007 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

TECHNICAL REPORT
CLC/TR 50453

RAPPORT TECHNIQUE
May 2007
TECHNISCHER BERICHT

ICS 29.020; 29.180 Supersedes R014-001:1999


English version


Evaluation of electromagnetic fields
around power transformers



Evaluation  Bewertung
des champs électromagnétiques von elektromagnetischen Feldern
autour des transformateurs de puissance in der Umgebung
von Leistungstransformatoren







This Technical Report was approved by CENELEC on 2006-01-14.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.





CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TR 50453:2007 E

---------------------- Page: 2 ----------------------

CLC/TR 50453:2007 - 2 -
Foreword
This Technical Report was prepared by Technical Committee CENELEC TC 14, Power Transformers.
The text of the draft was circulated for vote in accordance with the Internal Regulations, Part 2,
Subclause 11.4.3.3 and was approved by CENELEC as CLC/TR 50453 on 2006-01-14.
This Technical Report supersedes R014-001:1999.
_______________

---------------------- Page: 3 ----------------------

- 3 - CLC/TR 50453:2007
Contents
page

Introduction 4
1 Scope. 5
2 References. 5
3 Definitions. 5
4 Emission. 6
4.1 Radiated emission. 6
4.2 Conducted emission. 6
5 Immunity. 7
5.1 Radiated disturbances. 7
5.2 Conducted disturbances. 7
Annex A (informative) Method of calculation of power frequency magnetic field. 8
Annex B (informative) Method of calculation of power frequency electric field. 11
Bibliography. 13

---------------------- Page: 4 ----------------------

CLC/TR 50453:2007 - 4 -
Introduction
EMC is covered by three kinds of standardisation documents:
• Basic Standards:
Basic Standards are mainly informative documents covering disturbance phenomena, disturbance
levels and test and measurement techniques. For example, EN 61000/IEC 61000 is a Basic Standard.
• Generic Standards:
Generic Standards are intended to cover a range of products for which no Product Standard exists. For
example, EN 61000-3 and EN 61000-4, EN 61000-1 and EN 61000-2 are Generic Standards.
• Product Standards:
Product Standards are intended to deal with a specific family of electrical or electronic equipment.
Power transformers however, are considered as passive equipment and as such, the above referenced
documents are not applicable.
This Technical Report is in
...