CLC/TR 50422:2013

SLOVENSKI STANDARD
01-julij-2014
Vodilo za uporabo evropskega standarda EN 50160
Guide for the application of the European Standard EN 50160
Leitfaden zur Anwendung der Europäischen Norm EN 50160
Guide d’application de la Norme Européenne EN 50160
Ta slovenski standard je istoveten z: CLC/TR 50422:2013
ICS:
29.240.01 Omrežja za prenos in Power transmission and
distribucijo električne energije distribution networks in
na splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL REPORT
CLC/TR 50422
RAPPORT TECHNIQUE
September 2013
TECHNISCHER BERICHT
ICS 29.020 Supersedes CLC/TR 50422:2003 + corr. Jun.2005

English version
Guide for the application of the European Standard EN 50160

Guide d’application de la Norme Leitfaden zur Anwendung der
Européenne EN 50160 Europäischen Norm EN 50160

This Technical Report was approved by CENELEC on 2013-07-22.

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.

CENELEC
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

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TR 50422:2013 E
Contents Page
Foreword. 4
Introduction . 5
1 Scope . 6
2 Historical overview of the Standard and its development . 6
2.1 Historical development . 6
2.2 Structure . 9
2.3 New versions of EN 50160. A move towards limits and requirements . 10
2.4 HV chapter . 11
3 The Standard . 12
3.1 General. 12
3.2 Applicability . 13
3.3 Covered / Not covered phenomena . 15
3.4 Specific terms . 16
3.4.1 General. 16
3.4.2 Supply voltage . 16
3.4.3 Supply terminal and other reference points . 16
3.4.4 Nominal voltage (U ) and declared voltage (U ) . 17
n c
3.5 “Measurement according to EN 50160” . 18
3.6 Averaging times, observation periods . 18
3.7 PQ values & test methods . 19
3.7.1 Probability factors . 19
3.7.2 Verification of compliance with EN 50160. 20
3.8 Rapid voltage changes and flicker . 21
3.9 Voltage dips & swells classification tables. 22
3.9.1 Voltage dips characteristics . 22
3.9.2 Residual voltage (u) . 22
3.9.3 Duration (t) . 23
3.9.4 Voltage-dips statistics. 23
3.9.5 Voltage-swells characteristics . 24
3.9.6 Transient overvoltages . 25
3.10 Trends . 25
4 Position of EN 50160 in the standards scenario . 25
4.1 EMC & PQ. Relationship . 25
4.2 Position to other standards . 26
4.2.1 EMC Standards . 26
4.2.2 Other product standards. 28
4.2.3 EN 60038 . 28
4.2.4 EN 61000-4-30 . 29
Annex A (informative) Distributed generation and its impact on the supply voltage . 30
Annex B (informative) Voltage / current components in the frequency range 2 kHz – 150 kHz and
its impact on the supply voltage . 32
Annex C (informative) Overvoltages . 35
C.1 Temporary (power frequency) overvoltages between live conductors and earth . 35
C.1.1 General. 35
C.1.2 LV distribution systems . 35
C.1.3 MV distribution systems . 35
C.2 Transient overvoltages between live conductors and earth . 36
C.2.1 General. 36
C.2.2 LV distribution system . 36

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C.2.3 MV distribution systems . 38
C.3 Temporary (power frequency) overvoltages between live conductors . 38
Annex D (informative) Abbreviations . 39
Bibliography . 41

Foreword
This document (CLC/TR 50422:2013) has been prepared by CLC/TC 8X "System aspects of electrical energy
supply".
This Technical Report, prepared by TF 8 of CLC/TC 8X/WG 1 "Physical characteristics of electrical energy", is
based on CLC/TR 50422:2003 (first edition) [4] and the development having taken place since.
This document supersedes CLC/TR 50422:2003 + corrigendum June 2005.
this second edition has been extended, with regard to
 the inclusion of high voltage (HV) supply in the Standard,
 the relation between EN 50160 and other standards,
 the choice of power quality (PQ) values and related probabilities,
 actual trends in network use, which might lead to further development of the Standard.
For the purpose of this Technical Report, “the Standard” refers to EN 50160:2010 [8]. Likewise, “the Guide”
refers to this Application Guide, CLC/TR 50422:2013.
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.
This document has been prepared under a mandate given to CENELEC by the European Commission and
the European Free Trade Association.

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Introduction
By its very nature, a standard has to be concise and cannot give a comprehensive background of the subject
being dealt with. It was accordingly decided to prepare a guide providing additional information and
clarification of the Standard, whose first edition was published in 1994. The recent Application Guide
nd
represents the 2 edition of such a guide, which considers the development of the Standard having taken
st
place since the publication of the 1 edition.

1 Scope
The aim of this Technical Report is to provide background information and explanations on EN 50160 with
regard to the history of its development as well as to its correct application.
2 Historical overview of the Standard and its development
2.1 Historical development
The very first document dealing with some set of PQ characteristics – and therefore the origin of a related
European Standard some 13 years later – was an article published by the International Union of Producers
and Distributors of Electric Energy (UNIPEDE) in their magazine “Electricity Supply”, in May 1981 [32].
Experts of UNIPEDE WG “DISPERT” were commissioned “to define the different kinds of disturbances, which
can affect LV distribution voltage, caused by periodical or transient phenomena, resulting in overvoltages,
voltage dips, or other kinds of irregularities in the voltage wave”.
This document was prepared on the basis of information collected by European distributors, for the purpose of
providing information to network users fed from LV systems and to appliance designers on the actual
characteristics of the voltage distributed. It provided information about a set of characteristics:
 being recognised as representing the main irregularities in the LV supply voltage;
 being assumed as covering about 95 % of the cases;
 representing real supply voltage characteristics, to be taken into account at designing electrical and
electronic equipment with respect to their undegraded operation on mains supply;
 not intended to represent limit values, but with a view to acceptable values,
distinguished in four groups:
a) (quasi)stationary phenomena, mostly with close relation to 50 Hz:
 slow voltage variations;
 frequency variation;
 unbalance of three-phase voltages;
 harmonic voltage distortion;
 sudden voltage changes;
 DC component;
b) caused by occasional transient phenomena:
 voltage dips;
 transient voltage depressions;
 spikes originating in the operation of electrical equipment;
 surges of atmospheric origin;

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c) ripple control signals (or similar);
d) HF signals.
The existing levels of harmonic distortion, which were later used as the basis for the voltage characteristics of
harmonics, were published in 1981 in a paper published by the International Council on Large Electric
Systems (CIGRE) [29].
Eight years later, in September 1989, UNIPEDE published document DISNORM 12 [33],
• which kept the main principles of the afore-mentioned document, in particular the consideration of a
remaining “low probability – approxima
...