IEC TS 61934:2006

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

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.

General Information

• Status: Published
• Publication Date: 10-Apr-2006
• ICS: 17.220.99 - Other standards related to electricity and magnetism
• ICS: 29.035.01 - Insulating materials in general
• ICS: 29.080.30 - Insulation systems
• Technical Committee: TC 112 - Evaluation and qualification of electrical insulating materials and systems
• Drafting Committee: WG 2 - TC 112/WG 2
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 28-Apr-2011

Relations

• Revised: IEC TS 61934:2011 - Electrical insulating materials and systems - Electrical measurement of partial discharges (PD) under short rise time and repetitive voltage impulses
• Effective Date: 05-Sep-2023

Standards Content (Sample)

TECHNICAL IEC
SPECIFICATION TS 61934
First edition
2006-04
Electrical insulating materials and systems –
Electrical measurement of partial discharges (PD)
under short rise time and repetitive voltage
impulses
Reference number
IEC/TS 61934:2006(E)
Publication numbering
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TECHNICAL IEC
SPECIFICATION TS 61934
First edition
2006-04
Electrical insulating materials and systems –
Electrical measurement of partial discharges (PD)
under short rise time and repetitive voltage
impulses
 IEC 2006  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale S

International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – TS 61934  IEC:2006(E)
CONTENTS
FOREWORD.4

1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Measurement of partial discharge pulses during repetitive, short-rise time, voltage
impulses and comparison with power frequency .8
4.1 Measurement frequency .8
4.2 Measurement quantities .9
4.3 Test objects.9
4.4 Effect of testing conditions .10
5 PD detection methods .11
5.1 General .11
5.2 PD pulse coupling and detection devices.11
5.3 Source-controlled gating techniques.15
6 Display methods.15
7 Sensitivity of PD measurement .16
8 Test circuits.17
9 Test procedures .17
10 Test report.17

Annex A (informative) Indications on the voltage impulse suppression action required
by the coupling device .18
Annex B (informative) PD pulses extracted from a supply voltage impulse through
filtering techniques .20

Bibliography.22

Figure 1 – Coupling capacitor with multipole filter .12
Figure 2 – Example of voltage impulse and PD pulse frequency spectra before and
after filtering .12
Figure 3 – HFCT with multipole filter .13
Figure 4 – HFCT between test object and earth with multipole filter .13
Figure 5 – Circuit using an electromagnetic coupler (for example an antenna) to
suppress impulses from the test supply.13
Figure 6 – Example of waveforms of repetitive bipolar impulse voltage and charge
accumulation for on twisted-pair sample .14
Figure 7 – Charge measurements .14
Figure 8 – Example of PD detection using electronic source-controlled gating (other
PD coupling devices can be used) .15

TS 61934  IEC:2006(E) – 3 –
Figure A.1 – Schematic example of overlap between voltage impulse and PD pulse
spectra (dotted area) .18
Figure A.2 – Schematic example of voltage impulse and PD pulse spectra after filtering.18
Figure A.3 – Example of impulse voltage damping as a function of impulse voltage
magnitude and rise time.19
Figure B.1 – Power supply waveform and recorded PD pulses measured using an
antenna during supply voltage commutation.20
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).21
Figure B.3 – Characteristic of the filter used to pass from Figure B.1 to Figure B.2 .21

– 4 – TS 61934  IEC:2006(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSULATING MATERIALS AND SYSTEMS –
ELECTRICAL MEASUREMENT OF PARTIAL DISCHARGES (PD)
UNDER SHORT RISE TIME AND REPETITIVE VOLTAGE IMPULSES

FOREWORD
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Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 61934, which is a technical specification, has been prepared by IEC technical
committee 112: Evaluation and qualification of electrical insulating materials and systems .
———————
Provisional title.
TS 61934  IEC:2006(E) – 5 –
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
112/13/DTS 112/25/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A bilingual version of this publication may be issued at a later date.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• transformed into an International standard,
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 6 – TS 61934  IEC:2006(E)
ELECTRICAL INSULATING MATERIALS AND SYSTEMS –
ELECTRICAL MEASUREMENT OF PARTIAL DISCHARGES (PD)
UNDER SHORT RISE TIME AND REPETITIVE VOLTAGE IMPULSES

1 Scope
This Technical Specification is 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 µs or less.
Typical applications are EIS belonging to apparatus driven by power electronics, such as
motors.
NOTE 1 Use of this document with specific products may require specification of additional procedures.
NOTE 2 Those described in the TS are emerging technologies, so that experience and cautions, as well as
certain preconditions, are needed to apply this TS.
Excluded are
– methods based on optical or ultrasonic PD detection,
– fields of application for PD measurements when stressed by non-repetitive impulse
voltages.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition ci
...