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BS IEC/IEEE 62582-4:2022 2023

BS IEC/IEEE 62582-4:2022 2023

$167.15

Nuclear power plants. Instrumentation and control important to safety. Electrical equipment condition monitoring methods – Oxidation induction techniques

Published By Publication Date Number of Pages
BSI 2023 34
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 Blank Page
5 English
CONTENTS
7 FOREWORD
10 INTRODUCTION
12 1 Scope
2 Normative references
3 Terms and definitions
13 4 Abbreviated terms and acronyms
5 General description
6 Applicability and reproducibility
14 7 Measurement procedure
7.1 Stabilisation of the polymeric materials
7.2 Sampling
7.2.1 General
7.2.2 Sample requirements
7.2.3 Precautions
15 7.3 Sample preparation
7.4 Instrumentation
7.5 Calibration
7.6 OIT measurement method
7.6.1 Measurement procedure
16 7.6.2 Temperature profile
Figure 1 – OIT measurement – Schematic of temperature and gas profile and corresponding heat flow
17 7.6.3 Gas flow
7.6.4 Determining the value of oxidation onset
Figures
Figure 2 – Schematic showing the types of baselines (flat, sloping, endothermic dip, melting endotherm) observed for OIT and OITP measurements
18 7.6.5 Reporting
Figure 3 – Schematic showing definition of onset value for OIT and OITP measurements
19 7.7 OITP measurement method
7.7.1 Measurement procedure
7.7.2 Temperature profile
7.7.3 Gas flow
Figure 4 – Schematic of the temperature for OITP measurements and the corresponding heat flow
20 7.7.4 Determining the value of oxidation onset
7.7.5 Reporting
22 Annex A (informative) Interpretation of thermogram
A.1 Interpretation of OIT thermograms
Figure A.1 – Example of an OIT plot with clear baseline and onset
23 Figure A.2 – Example of OIT plot with multiple onsets
24 Figure A.3 – Example of OIT plot where the baseline is difficult to define
Figure A.4 – Example of OIT plot where heat flow is too lowto use standard 0,1 W∙g–1 threshold
25 A.2 Interpretation of OITP thermograms
Figure A.5 – Example of an OITP plot with a well-defined baseline and onset
26 Figure A.6 – Example of an OITP plot for a semi-crystalline material showing a melting endotherm prior to the oxidation onset
Figure A.7 – Example of an OITP plot showing an endothermic dip immediately prior to the oxidation onset
27 Annex B (informative) Example of a measurement report from OITP and OIT
B.1 OITP measurements
Tables
Table B.1 – Example of a measurement report from OITP
28 Figure B.1 – Example of OITP test plot
29 B.2 OIT measurements
Table B.2 – Example of a measurement report from OIT
30 Figure B.2 – Example of OIT test plot
31 Annex C (informative) Influence of set temperature on the OIT value
Figure C.1 – Example of the influence of set temperature on the OIT value
32 Bibliography

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BS IEC/IEEE 62582-4:2022 2023
$167.15