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BSI PD IEC TS 61934:2024

BSI PD IEC TS 61934:2024

$142.49

Electrical insulating materials and systems. Electrical measurement of partial discharges (PD) under short rise time and repetitive voltage impulses

Published By Publication Date Number of Pages
BSI 2024 30
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Normative references
3 Terms and definitions
11 4 Measurement of partial discharge pulses during repetitive, short rise-time voltage impulses and comparison with power frequency
4.1 Measurement frequency
4.2 Measurement quantities
12 4.3 Test objects
4.3.1 General
4.3.2 Inductive test objects
4.3.3 Capacitive test objects
4.3.4 Distributed impedance test objects
4.4 Voltage impulse generators
4.4.1 General
13 4.4.2 Voltage impulse waveforms
4.5 Effect of testing conditions
4.5.1 General
Tables
Table 1 – Example of parameter values of impulse voltage waveform without load
14 4.5.2 Effect of environmental factors
4.5.3 Effect of testing conditions and ageing
5 PD detection methods
5.1 General
5.2 PD pulse coupling and detection devices
5.2.1 Introductory remarks
15 5.2.2 Coupling capacitor with multipole filter
Figures
Figure 1 – Coupling capacitor with multipole filter
16 5.2.3 HFCT with multipole filter
Figure 2 – Example of voltage impulse and ideal PD pulse frequency spectra before and after filtering
Figure 3 – HFCT between supply and test object with multipole filter
17 5.2.4 Electromagnetic couplers
5.2.5 Electromagnetic UHF antennae
Figure 4 – HFCT between test object and earth with multipole filter
Figure 5 – Circuit using an electromagnetic coupler (e.g. an antenna) to suppress impulses from the test supply
18 6 Measuring instruments
7 Sensitivity check of the PD measuring equipment and high voltage source generator
7.1 General
7.2 Test diagram for sensitivity check
Figure 6 – Circuit using an electromagnetic UHF antenna
19 7.3 PD detection sensitivity check
7.4 Background noise check
7.5 Detection system and HVIG noise check
7.6 Sensitivity report
Figure 7 – Test diagram for sensitivity check
20 8 Test procedure for increasing and decreasing the repetitive impulse voltage magnitude
Figure 8 – Example of relation between the outputs of LVPG and PD detector
21 9 Test report
Figure 9 – Example of increasing and decreasing the impulse voltage magnitude
22 Annex A (informative) Voltage impulse suppression required by the coupling device
Figure A.1 – Example of overlap between voltage impulseand PD pulse spectra (dotted area)
Figure A.2 – Example of voltage impulse and PD pulse spectra after filtering
23 Figure A.3 – Example of impulse voltage damping as a function of impulse voltage magnitude and rise time
24 Annex B (informative) PD pulses extracted from a supply voltage impulse through filtering techniques
Figure B.1 – Power supply waveform and recorded signalusing an antenna during supply voltage commutation
25 Figure B.2 – Signal detected by an antenna from the recordof Figure B.1, using a filtering technique (400 MHz high-pass filter)
Figure B.3 – Characteristic of the filter used to pass from Figure B.1 to Figure B.2
26 Annex C (informative) Results of round-robin tests of RPDIV measurement
Figure C.1 – Sequence of negative voltage impulses used for RRT
27 Figure C.2 – PD pulses corresponding to voltage impulses
Figure C.3 – Dependence of normalized RPDIV on 100 data (NRPDIV/100) on relative humidity
28 Annex D (informative) Examples of noise levels of practical PD detectors
Table D.1 – Examples of bandwidths and noise levels for practical PD sensors
29 Bibliography

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BSI PD IEC TS 61934:2024
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