BSI DD IEC/TS 61934:2006
$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 | 2006 | 26 |
Applicable to the off-line electrical measurement of partial discharges (PD) that occur in electrical insulation systems (EIS) when stressed by repetitive voltage impulses having a rise time of 50 us or less. Typical applications are EIS belonging to apparatus driven by power electronics, such as motors. Excluded are – methods based on optical or ultrasonic PD detection, – fields of application for PD measurements when stressed by non-repetitive impulse voltages.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 6 | FOREWORD |
| 8 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 Measurement of partial discharge pulses during repetitive, short-rise time, voltage impulses and comparison with power frequency 4.1 Measurement frequency |
| 11 | 4.2 Measurement quantities 4.3 Test objects |
| 12 | 4.4 Effect of testing conditions |
| 13 | 5 PD detection methods 5.1 General 5.2 PD pulse coupling and detection devices |
| 14 | Figure 1 – Coupling capacitor with multipole filter Figure 2 – Example of voltage impulse and PD pulse frequency spectra before and after filtering |
| 15 | Figure 3 – HFCT with multipole filter Figure 4 – HFCT between test object and earth with multipole filter Figure 5 – Circuit using an electromagnetic coupler (for example an antenna) to suppress impulses from the test supply |
| 16 | Figure 6 – Example of waveforms of repetitive bipolar impulse voltage and charge accumulation for on twisted-pair sample Figure 7 – Charge measurements |
| 17 | 5.3 Source-controlled gating techniques 6 Display methods Figure 8 – Example of PD detection using electronic source-controlled gating (other PD coupling devices can be used) |
| 18 | 7 Sensitivity of PD measurement |
| 19 | 8 Test circuits 9 Test procedures 10 Test report |
| 20 | Annex A (informative) Indications on the voltage impulse suppression action required by the coupling device Figure A.1 – Schematic example of overlap between voltage impulse and PD pulse spectra (dotted area) Figure A.2 – Schematic example of voltage impulse and PD pulse spectra after filtering |
| 21 | Figure A.3 – Example of impulse voltage damping as a function of impulse voltage magnitude and rise time |
| 22 | Annex B (informative) PD pulses extracted from a supply voltage impulse through filtering techniques Figure B.1 – Power supply waveform and recorded PD pulses measured using an antenna during supply voltage commutation |
| 23 | Figure B.2 – Partial discharge pulses detected by an antenna from the record of 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 |
| 24 | Bibliography |
