<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The problem of insulation damage from partial discharges below the inception voltage has not yet attracted much attention. Indications of possible damage exist from previous research. In this paper, the possibility of existence of such phenomena is investigated with small air gaps and point-plane electrode arrangements. It is shown that random discharges below inception voltage may exist. Such discharges are registered and their waveforms are discussed. Experimental evidence is offered that discharges change from the pulse-type to a pulseless-type as the air gap becomes larger. Phenomena affecting in some way the insulating systems below inception may help us to better understand the mechanism of small current flow at relatively low voltages and may contribute to a better formulation of dielectric materials. Furthermore, besides the experimental results, the problem of definitions regarding these phenomena is discussed and commented upon.</p></abstract>

The problem of insulation damage from partial discharges below the inception voltage has not yet attracted much attention. Indications of possible damage exist from previous research. In this paper, the possibility of existence of such phenomena is investigated with small air gaps and point-plane electrode arrangements. It is shown that random discharges below inception voltage may exist. Such discharges are registered and their waveforms are discussed. Experimental evidence is offered that discharges change from the pulse-type to a pulseless-type as the air gap becomes larger. Phenomena affecting in some way the insulating systems below inception may help us to better understand the mechanism of small current flow at relatively low voltages and may contribute to a better formulation of dielectric materials. Furthermore, besides the experimental results, the problem of definitions regarding these phenomena is discussed and commented upon.

Detection and Recording of Partial Discharges Below the Inception Voltage with a Point-Plane Electrode Arrangement in Air: Experimental Data and Definitions

Department of Electrical and Computer Engineering, Power Systems Laboratory, Democritus University of Thrace, 67100 Xanthi, Greece

Journal of Electrical Engineering

The problem of insulation damage from partial discharges below the inception voltage has not yet attracted much attention. Indications of possible damage exist...

Detection and Recording of Partial Discharges Below the Inception Voltage with a Point-Plane Electrode Arrangement in Air: Experimental Data and Definitions

Published Online: Jun 07, 2011

Page range: 177 - 182

DOI: https://doi.org/10.2478/v10187-010-0025-4

Keywords
partial discharges, inception voltage, gap spacing, charging events below inception voltage

This content is open access.

Detection and Recording of Partial Discharges Below the Inception Voltage with a Point-Plane Electrode Arrangement in Air: Experimental Data and Definitions

Published Online: Jun 07, 2011

Page range: 177 - 182

DOI: https://doi.org/10.2478/v10187-010-0025-4

Keywordspartial discharges, inception voltage, gap spacing, charging events below inception voltage

This content is open access.

Keywords
partial discharges, inception voltage, gap spacing, charging events below inception voltage