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BS EN IEC 61757-4-3:2020:2022 Edition

BS EN IEC 61757-4-3:2020:2022 Edition

$198.66

Fibre optic sensors – Part 4-3: Electric current measurement. Polarimetric method

Published By Publication Date Number of Pages
BSI 2022 56
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PDF Pages PDF Title
2 undefined
7 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
9 English
CONTENTS
12 FOREWORD
14 INTRODUCTION
15 1 Scope
2 Normative references
3 Terms and definitions
17 4 Components of optical current sensor using polarimetric method
4.1 General descriptions
Figures
Figure 1 – Measurement system using optical current sensor
18 4.2 Classification of Faraday elements
Figure 2 – Construction of optical current sensor
19 5 Characteristic test
5.1 General information
5.2 Output power of light source
Figure 3 – Classification of Faraday elements
Tables
Table 1 – List of parameters to be obtained
20 5.3 Input power of light detector
5.4 I/O characteristics
5.4.1 General
Figure 4 – Example of an optical power monitor
Figure 5 – Example of the amplifying circuit of a light detector
21 5.4.2 Test method
Figure 6 – I/O characteristics of an optical current sensor
22 Figure 7 – Measurement system of waveform comparison method
Table 2 – Test method
23 5.4.3 Test procedure
Figure 8 – Measurement system of AC bridge method
25 5.4.4 Evaluation
26 5.5 Warm-up time
5.5.1 General
5.5.2 Test method
5.5.3 Evaluation
5.6 Current conditions for obtaining each parameter
Table 3 – Current conditions for obtaining each parameter
27 5.7 Input parameter dependency
5.7.1 Frequency characteristic
5.7.2 Transient characteristic
28 Figure 9 – Transient characteristics of AC dedicated system
29 5.8 External environment dependency
5.8.1 Steady state temperature characteristic test
Figure 10 – Transient characteristics of DC/AC system
31 Figure 11 – Configuration example of steady state temperature characteristictest and transient temperature characteristic test of sensor part
Figure 12 – Example of temperature profile
32 5.8.2 Transient temperature characteristic test
Figure 13 – Birefringence change during temperature change
34 5.8.3 External magnetic field test
Figure 14 – Example of temperature programme
35 5.8.4 Conductor position test
Figure 15 – Position of the outer conductor in the externalmagnetic field test when the Faraday element is an optical fibre
36 5.8.5 Vibration test
Figure 16 – Position of the conductor in the conductorposition test when the Faraday element is an optical fibre
37 Annex A (informative)Principle of optical current sensor
A.1 Outline
A.2 Faraday effect
Figure A.1 – Faraday effect
38 A.3 Types of Faraday element
A.4 Conversion of the Faraday effect into an electric signal
A.4.1 Detection of the Faraday effect of nonmagnetic material
A.4.2 Detection of the Faraday effect of ferromagnetic material
39 A.5 Current detection method
A.5.1 General
A.5.2 Examples of current detection method
Figure A.2 – Configuration of current detection method using Faraday effect
40 Figure A.3 – Basic configuration of intensity modulation type optical current sensor
Figure A.4 – Configuration example of intensitymodulation type reflective optical current sensor
41 Figure A.5 – Configuration example of interference type optical current sensor
42 Annex B (informative) Features of optical current sensor technology
43 Annex C (informative) Design considerations
C.1 General information
C.2 Performance restricting factors
44 C.3 Procedure for determining the specifications of the equipment
46 Annex D (informative) Optical current sensor output in the application of other phase magnetic fields
D.1 Ampere’s circulation integral law
D.2 Influence of other phase magnetic fields
Figure D.1 – The law of Ampere’s circulation integral
47 Figure D.2 – Image diagram of incomplete closed loop
48 Annex E (informative)Measurement parameter performance table
E.1 General
E.2 Output power of light source
E.3 Input power of light detector
E.4 I/O characteristics
Table E.1 – Output power of light source
Table E.2 – Input power of light detector
Table E.3 – I/O characteristics
49 E.5 Frequency characteristics
Table E.4 – Frequency characteristics
50 E.6 Transient characteristics
E.7 Steady state temperature characteristics
Figure E.1 – Example of the transient characteristic
Figure E.2 – Example of the temperature characteristics at current 0
51 E.8 Transient temperature characteristics
Figure E.3 – Example of the temperature characteristics at rated current
Figure E.4 – Example of the transient temperaturecharacteristics at input current 0
52 E.9 External magnetic field
Figure E.5 – Example of the transient temperaturecharacteristics at rated current
Table E.5 – External magnetic field
53 E.10 Conductor positions
Figure E.6 – Positions of the outer conductor
Figure E.7 – Positions of the conductor in the conductor positions test
Table E.6 – Conductor position
54 E.11 Vibration
Figure E.8 – Example of the vibration test at current 0
Figure E.9 – Example of the vibration test at rated current
55 Bibliography

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BS EN IEC 61757-4-3:2020
$198.66