IEC 61757-7-3:2024
(Main)Fibre optic sensors - Part 7-3: Voltage measurement - Polarimetric method
Fibre optic sensors - Part 7-3: Voltage measurement - Polarimetric method
IEC 61757-7-3:2024 defines the terminology, structure, and performance characteristics of fibre optic voltage sensors using a polarimetric measurement method. The document specifies test methods and procedures for measuring key performance parameters of these sensors. It addresses only the voltage sensing element and not the additional devices that are unique to each application. The document does not specify the required performance values of optical polarimetric fibre optic voltage sensors, because these specifications depend on the designated application of the sensor and are typically defined by the user of the sensor. The required performance values are usually defined when designing a sensor for a specific application.
Capteurs fibroniques - Partie 7-3: Mesure de tension - Méthode polarimétrique
IEC 61757-7-3:2024 définit la terminologie, la structure et les caractéristiques de performance des capteurs de tension fibroniques à l’aide d’une méthode de mesure polarimétrique. Le document spécifie les méthodes et procédures d’essai permettant de mesurer les paramètres de performance clés de ces capteurs. Il traite uniquement de l’élément de détection de tension, et non des dispositifs supplémentaires qui sont propres à chaque application. Le document ne spécifie pas les valeurs de performance exigées des capteurs de tension fibroniques polarimétriques, car ces spécifications dépendent de l’application choisie pour le capteur et sont généralement définies par l’utilisateur du capteur. Les valeurs de performance exigées sont habituellement définies lors de la conception d’un capteur pour une application spécifique.
General Information
Standards Content (Sample)
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
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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
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 – Test methods . 13
Table 3 – Voltage conditions for obtaining characteristic parameters . 18
Table A.1 – Direction of electric field with sensitivity .
...
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