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BS EN IEC/IEEE 62582-6:2021

BS EN IEC/IEEE 62582-6:2021

$142.49

Nuclear power plants. Instrumentation and control important to safety. Electrical equipment condition monitoring methods – Insulation resistance

Published By Publication Date Number of Pages
BSI 2021 30
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This part of IEC/IEEE 62582 contains methods for condition monitoring of organic and polymeric materials in instrumentation and control cables using insulation resistance measurements in the detail necessary to produce accurate and reproducible results during simulated accident conditions. It includes the requirements for the measurement system and measurement procedure, and the reporting of the measurement results.

NOTE Measurement of insulation resistance during simulated accident conditions with the aim of determining the lowest value during the accident in order to assess cable performance involves special requirements given in this document. Methods for measurement under stable (non-accident) conditions are available in other international standards, e.g. IEC 62631-3-3.

The different parts of the IEC/IEEE 62582 series are measurement standards, primarily for use in the management of ageing in initial qualification and after installation. IEC/IEEE 62582- 1 includes requirements for the application of the other parts of the IEC/IEEE 62582 series and some elements which are common to all methods. Information on the role of condition monitoring in qualification of equipment important to safety is found in IEC/IEEE 60780-323.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
6 English
CONTENTS
8 FOREWORD
10 INTRODUCTION
12 1 Scope
2 Normative references
3 Terms and definitions
13 4 Abbreviated terms and acronyms
14 5 General description
15 Figures
Figure 1 – Time to stabilization of IR measured before LOCA, after 10 minin LOCA and after 60 min in LOCA
16 6 Applicability and reproducibility
7 Instrumentation
7.1 Measurement voltage level
7.2 Uncertainty
17 7.3 Calibration
8 IR measurement procedure
8.1 General
8.2 Requirements on tracking of changes of IR during the simulated accident conditions
8.3 Test specimen
8.4 Interference
8.5 Conditioning
18 8.6 IR measurement during the dynamic phase of the simulated accident conditions
8.6.1 Set-up for the measurement
8.6.2 Connection of IR voltage and start of measurement
8.6.3 Default voltage
8.6.4 Determination of IR value with the specimen not energized during the accident simulation
19 8.6.5 Determination of the IR value with the specimen energized during the accident simulation
20 9 Measurement report
21 Annex A (informative)Example of equivalent diagram for a cable and themeasuring device using DC
Figure A.1 – Set-up for measurement of IR using a DC voltage source(guard is not needed if the ground plane is close to the insulator)
22 Annex B (informative)Measurement of leakage current using AC voltage
Figure B.1 – Set-up for measurement of IR using an AC voltage source
23 Annex C (informative)Dependence of IR on temperature only and combined with steam
Figure C.1 – Temperature influence on IR of an insulation between 20 °C and 150 °C
24 Annex D (informative)Examples of results of measurement of IR on aged cablesduring simulated accident conditions
Figure D.1 – Example of result of measurement of IR between conductors andground/shielding during a LOCA test
25 Figure D.2 – Example of measurement of IR betweenconductor and ground and between conductors
26 Figure D.3 – Example of measurement of IR on a three-conductorcable during LOCA simulation
27 Annex E (informative)Example of a measurement loop and calculation of the time available for stabilization for more than one conductor or group of conductors measured with the same measurement instrument
E.1 Example of one measurement loop
E.2 Total time for each measurement of all combinations during the dynamic phase of the simulated accident conditions
Figure E.1 – Example of one measurement loop
28 Bibliography

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BS EN IEC/IEEE 62582-6:2021
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