IEC/IEEE 62582-4:2011
(Main)Nuclear power plants - Instrumentation and control important to safety - Electrical equipment condition monitoring methods - Part 4: Oxidation induction techniques
Nuclear power plants - Instrumentation and control important to safety - Electrical equipment condition monitoring methods - Part 4: Oxidation induction techniques
IEC/IEEE 62582-4:2011 specifies methods for condition monitoring of organic and polymeric materials in instrumentation and control systems using oxidation induction techniques in the detail necessary to produce accurate and reproducible measurements. It includes the requirements for sample preparation, the measurement system and conditions, and the reporting of the measurement results.
Centrales nucléaires de puissance - Instrumentation et contrôle-commande importants pour la sûreté - Méthodes de surveillance de l'état des matériels électriques - Partie 4: Techniques d'induction à l'oxydation
La CEI/IEEE 62582-4:2011 établit des spécifications pour les méthodes de surveillance de l'état des matériaux organiques et des polymères présents dans les systèmes d'instrumentation et de contrôle commande, en utilisant des techniques d'induction à l'oxydation, avec un niveau de détail qui est nécessaire pour assurer le caractère reproductible et la précision des mesures. Ceci comprend des exigences applicables à la préparation des échantillons, aux systèmes et aux conditions de mesure, ainsi qu'à la documentation des résultats de mesure.
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IEC/IEEE 62582-4
Edition 1.0 2011-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Nuclear power plants – Instrumentation and control important to safety –
Electrical equipment condition monitoring methods –
Part 4: Oxidation induction techniques
Centrales nucléaires de puissance – Instrumentation et contrôle-commande
importants pour la sûreté – Méthodes de surveillance de l’état des matériels
électriques –
Partie 4: Techniques d'induction à l'oxydation
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IEC/IEEE 62582-4
Edition 1.0 2011-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Nuclear power plants – Instrumentation and control important to safety –
Electrical equipment condition monitoring methods –
Part 4: Oxidation induction techniques
Centrales nucléaires de puissance – Instrumentation et contrôle-commande
importants pour la sûreté – Méthodes de surveillance de l’état des matériels
électriques –
Partie 4: Techniques d'induction à l'oxydation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
PRICE CODE
U
CODE PRIX
ICS 27.120.20 ISBN 978-2-88912-666-8
– 2 – 62582-4 IEC/IEEE:2011
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope and object . 8
2 Terms and definitions . 8
3 Abbreviations and acronyms . 8
4 General description . 9
5 Applicability and reproducibility . 9
6 Measurement procedure . 9
6.1 Stabilisation of the polymeric materials. 9
6.2 Sampling . 10
6.2.1 General . 10
6.2.2 Sample requirements . 10
6.2.3 Precautions . 10
6.3 Sample preparation . 10
6.4 Instrumentation . 11
6.5 Calibration . 11
6.6 OIT measurement method . 11
6.6.1 Measurement procedure . 11
6.6.2 Temperature profile . 12
6.6.3 Gas flow . 13
6.6.4 Determining the value of oxidation onset . 13
6.6.5 Reporting . 14
6.7 OITP measurement method . 15
6.7.1 Measurement procedure . 15
6.7.2 Temperature profile . 16
6.7.3 Gas flow . 16
6.7.4 Determining the value of oxidation onset . 16
6.7.5 Reporting . 16
Annex A (informative) Interpretation of thermograms . 18
Annex B (informative) Example of a measurement report from OITP measurements . 23
Annex C (informative) Influence of set temperature on the OIT value . 25
Bibliography . 26
Figure 1 – OIT measurement – Schematic of temperature and gas profile and
corresponding heat flow . 12
Figure 2 – Schematic showing the types of baselines (flat, sloping, endothermic dip,
melting endotherm) observed for OIT and OITP measurements . 13
Figure 3 – Schematic showing definition of onset value for OIT and OITP
measurements . 14
Figure 4 – Schematic of the temperature for OITP measurements and the
corresponding heat flow . 15
Figure A.1 – Example of an OIT plot with clear baseline and onset . 18
Figure A.2 – Example of OIT plot with multiple onsets . 19
Figure A.3 – Example of OIT plot where the baseline is difficult to define . 20
62582-4 IEC/IEEE:2011 – 3 –
–1
Figure A.4 – Example of OIT plot where heat flow is too low to use standard 0,1 W∙g
threshold . 20
Figure A.5 – Example of an OITP plot with a well-defined baseline and onset . 21
Figure A.6 – Example of an OITP plot for a semi-crystalline material showing a melting
endotherm prior to the oxidation onset . 22
Figure A.7 – Example of an OITP plot showing an endothermic dip immediately prior to
the oxidation onset . 22
Figure C.1 – Example of the influence of set temperature on the OIT value . 25
– 4 – 62582-4 IEC/IEEE:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NUCLEAR POWER PLANTS –
INSTRUMENTATION AND CONTROL IMPORTANT TO SAFETY –
ELECTRICAL EQUIPMENT CONDITION MONITORING METHODS –
Part 4: Oxidation induction techniques
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