EN IEC 61757-7-3:2024

SLOVENSKI STANDARD
01-julij-2024
Optični senzorji - 7-3. del: Merjenje napetosti - Polarimetrijska metoda (IEC 61757-7
-3:2024)
Fibre optic sensors - Part 7-3: Voltage measurement - Polarimetric method (IEC 61757-7
-3:2024)
Lichtwellenleiter-Sensoren - Teil 7-3: Spannungsmessung - Polarimetrisches Verfahren
(IEC 61757-7-3:2024)
Capteurs fibroniques - Partie 7-3: Mesure de tension - Méthode polarimétrique (IEC
61757-7-3:2024)
Ta slovenski standard je istoveten z: EN IEC 61757-7-3:2024
ICS:
33.180.99 Druga oprema za optična Other fibre optic equipment
vlakna
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61757-7-3

NORME EUROPÉENNE
EUROPÄISCHE NORM May 2024
ICS 33.180.99
English Version
Fibre optic sensors - Part 7-3: Voltage measurement -
Polarimetric method
(IEC 61757-7-3:2024)
Capteurs fibroniques - Partie 7-3: Mesure de tension - Lichtwellenleiter-Sensoren - Teil 7-3: Spannungsmessung -
Méthode polarimétrique Polarimetrisches Verfahren
(IEC 61757-7-3:2024) (IEC 61757-7-3:2024)
This European Standard was approved by CENELEC on 2024-05-24. 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.
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Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61757-7-3:2024 E

European foreword
The text of document 86C/1873/CDV, future edition 1 of IEC 61757-7-3, prepared by SC 86C "Fibre
optic systems and active devices" of IEC/TC 86 "Fibre optics" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 61757-7-3:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-02-24
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-05-24
document have to be withdrawn
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61757-7-3:2024 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 61300-2-1 NOTE Approved as EN IEC 61300-2-1
IEC 61300-2-9 NOTE Approved as EN 61300-2-9
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 61757 -  Fibre optic sensors - Generic specification EN IEC 61757 -

IEC 61757-7-3 ®
Edition 1.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic sensors –
Part 7-3: Voltage measurement – Polarimetric method

Capteurs fibroniques –
Partie 7-3: Mesure de tension – Méthode polarimétrique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.99  ISBN 978-2-8322-8756-9

– 2 – IEC 61757-7-3:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Components of optical voltage sensor using polarimetric method . 9
4.1 General description . 9
4.2 Classification of Pockels cells . 10
5 Characteristic tests . 11
5.1 General information . 11
5.2 Input-to-output characteristics . 11
5.2.1 General . 11
5.2.2 Test methods . 12
5.2.3 Test procedure . 14
5.2.4 Evaluation . 16
5.3 Warm-up time . 17
5.3.1 General . 17
5.3.2 Test method . 17
5.3.3 Evaluation . 17
5.4 Voltage conditions for obtaining characteristic parameters . 17
5.5 Input parameter dependency . 18
5.5.1 Frequency characteristics . 18
5.5.2 Transient characteristics . 19
5.6 External environment dependency . 21
5.6.1 Test of the steady state temperature characteristics . 21
5.6.2 Test of the transient temperature characteristics . 23
5.6.3 Shock and vibration test . 26
Annex A (informative) Principle of optical voltage sensor . 27
A.1 Outline . 27
A.2 Pockels effect . 27
A.3 Voltage detection method . 29
A.3.1 General . 29
A.3.2 Examples of voltage detection method . 30
Annex B (informative) Features of optical voltage sensor technology . 32
Annex C (informative) Design considerations . 33
C.1 General information . 33
C.2 Performance restricting factors . 33
C.3 Procedure for determining the specifications of the equipment . 34
Annex D (informative) Measurement parameter performance table . 36
D.1 General . 36
D.2 I/O characteristics . 36
D.3 Frequency characteristics . 37
D.4 Transient characteristics . 38
D.5 Steady state temperature characteristics . 39
D.6 Transient temperature characteristics . 40
D.7 Shock test . 41

IEC 61757-7-3:2024 © IEC 2024 – 3 –
Bibliography . 42

Figure 1 – Measurement system using optical voltage sensor . 10
Figure 2 – I/O characteristics of a fibre optic voltage sensor . 12
Figure 3 – Measurement setup for the waveform comparison method . 13
Figure 4 – Measurement setup for the AC bridge method . 14
Figure 5 – Transient characteristics of sensors for AC measurements . 20
Figure 6 – Transient characteristics of sensors for AC/DC measurements. 21
Figure 7 – Configuration example for evaluating the steady temperature and transient
temperature characteristics of the sensor part . 22
Figure 8 – Example of a temperature profile. 23
Figure 9 – Birefringence change during temperature change. 24
Figure 10 – Example of temperature program . 25
Figure A.1 – Pockels effect . 28
Figure A.2 – Configuration of a voltage detection system using the Pockels effect . 29
Figure A.3 – Basic configuration of an optical voltage sensor using the intensity
modulation method . 30
Figure A.4 – Basic configuration of an optical voltage sensor using the interferometric
method . 31
Figure D.1 – Example of the transient characteristic . 38
Figure D.2 – Example of the temperature characteristics at voltage 0 . 39
Figure D.3 – Example of the temperature characteristics at rated voltage . 39
Figure D.4 – Example of the transient temperature characteristics at input voltage 0 . 40
Figure D.5 – Example of the transient temperature characteristics at rated voltage . 40
Figure D.6 – Example of the shock test at voltage 0 . 41
Figure D.7 – Example of the shock test at rated voltage . 41

Table 1 – List of parameters to be obtained . 11
Table 2
...