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BSI PD IEC/TS 62478:2016

BSI PD IEC/TS 62478:2016

$167.15

High voltage test techniques. Measurement of partial discharges by electromagnetic and acoustic methods

Published By Publication Date Number of Pages
BSI 2016 38
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This document is applicable to electromagnetic (HF/VHF/UHF) and acoustic measurements of PDs which occur in insulation of electrical apparatus.

This specification deals with a large variety of applications, sensors of different frequency ranges and differing sensitivities. The tasks of PD location and measuring system calibration or sensitivity check are also taken into account.

PDF Catalog

PDF Pages PDF Title
4 English
CONTENTS
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Normative references
3 Terms and definitions
12 4 Electromagnetic PD phenomena
4.1 Physical background
4.2 Transmission aspects
4.3 Measuring systems
4.3.1 Electric/electromagnetic fields
4.3.2 Frequency ranges
4.3.3 Sensors
14 4.3.4 Instrument related influences
15 4.3.5 Instrument quantities
4.3.6 Performance and sensitivity check
Figures
Figure 1 – Classification of instruments for signal processing
16 Figure 2 – Overview of the important aspects of electromagnetic PD detection
Figure 3 – Overview of performance and sensitivity checks in different apparatus
17 5 Acoustic PD phenomena
5.1 Physical background
5.2 Transmission path aspects
5.3 Measuring system
5.3.1 General
18 5.3.2 Sensors
5.3.3 Instrument quantities
19 5.3.4 Performance and sensitivity check
6 Location of PD sources
6.1 General
20 6.2 Electromagnetic methods
6.3 Acoustic methods
6.4 Mixed electromagnetic and acoustic methods
21 Annex A (informative)Advantages and disadvantages of electromagnetic measurements
A.1 Advantages
A.2 Disadvantages
22 Annex B (informative)Advantages and disadvantages of acoustic PD measurements
B.1 Advantages
B.2 Disadvantages
23 Annex C (informative)Application-specific aspects
C.1 Gas insulated switchgear (GIS)
C.2 VHF and UHF methods
24 C.3 Acoustic methods
25 C.4 Sensitivity verification of electromagnetic and acoustic measurements on GIS
C.4.1 General
C.4.2 Sensitivity verification of UHF measurements
26 C.4.3 Sensitivity verification of acoustic measurement
C.4.4 Location of PD sources inside GIS
C.4.5 Time-of-flight measurements with the UHF method
27 C.4.6 Signal reduction analysis
C.4.7 Acoustic location methods
Figure C.1 – Defect location by time-of-flight measurement
28 C.5 Rotating machines
29 C.6 Transformers
C.6.1 Physical background of high frequency and acoustic PD phenomena on transformers
30 C.6.2 UHF PD signals in transformers
C.6.3 Acoustic PD signals in transformers
C.6.4 Spatial location of PD sources in liquid-insulated transformers/reactors
Figure C.2 – Illustration of the physical principle of acousticand electromagnetic PD detection in an oil/paper insulated transformer
31 C.7 Cable/accessories
Figure C.3 – Classical arrival time based PD location for transformers/reactorswith a combination of the electric and acoustic PD signals
35 Bibliography

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BSI PD IEC/TS 62478:2016
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