IEC TS 61934:2011

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement of partial discharge pulses during repetitive,
  short rise-time voltage impulses and comparison with
  power frequency
5 PD detection methods
6 Measuring instruments
7 Sensitivity check of the PD measuring equipment
8 Test procedure for increasing and decreasing the repetitive
  impulse voltage magnitude
9 Test report
Annex A (informative) - Voltage impulse suppression required
        by the coupling device
Annex B (informative) - PD pulses extracted from a supply
        voltage impulse through filtering techniques
Annex C (informative) - Result of round-robin tests of RPDIV
        measurement
Annex D (informative) - Examples of noise levels of practical
        PD detectors
Bibliography

IEC/TS 61934:2011(E) 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 generated from electronic power devices. Typical applications are EIS belonging to apparatus driven by power electronics, such as motors, inductive reactors and windmill generators. Excluded from the scope of this technical specification are:
- methods based on optical or ultrasonic PD detection,
- fields of application for PD measurements when stressed by non-repetitive impulse voltages such as lightning impulse or switching impulses from switchgear.
The principal changes with regard to the previous edition concern the addition of:
- an Introduction that provides some background information on the progress being made in the field of power electronics;
- impulse generators;
- PD detection methods;
- a new informative Annex C covering practical experience obtained from round-robin testing (RRT);
- example of noise levels, as shown in new informative Annex D.