NDLI: Spatio-temporal development of surface charges on spacers stressed with DC voltages

Content Provider	IEEE Xplore Digital Library
Author	Bektas, S.I.
Copyright Year	1965
Abstract	The development of surface charge on a right-cylindrical spacer under different DC stress levels is measured in SF/sub 6/ for several hours. The DC voltage stress levels are below the stresses where partial discharges with AC voltage generally occur. The measurements indicate that charges are mainly deposited on one side only of the spacer and are predominantly of opposite polarity to that of the applied voltage. The charge and its area increase with time and saturate. Typical saturation times are approximately 3 and 9 h for 10 kV and 5 kV respectively. Magnitudes of saturated charge increase linearly with applied voltage. Various factors which may affect charge accumulation pattern are investigated. Measurements show that charge deposition on a spacer are influenced insignificantly by gamma -irradiation or a change of gas from SF/sub 6/ to air. However, charge depositions are influenced by surface conductance of the spacer. The charging of the spacer is negligible when stressed with AC and impulse voltages with peak voltages in a range similar to the DC levels used.<>
Sponsorship	IEEE Waseda Univ Univ. Salford
Starting Page	515
Ending Page	520
Page Count	6
File Size	483173
File Format	PDF
ISSN	00189367
Volume Number	25
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-06-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage Surface charging Probes Current measurement Sulfur hexafluoride Charge measurement Electrodes Stress measurement Gas insulation
Content Type	Text
Resource Type	Article
Subject	Engineering Electrical and Electronic Engineering

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Mechanism and Effect of DC Charge Accumulation on SF6 Gas Insulated Spacers

Surface charging and flashover of spacers in SF/sub 6/ under impulse voltages

Time dependence of spacer charging in SF6 under DC stress

Mechanism and effect of DC charge accumulation on SF/sub 6/ gas insulated spacers

Surface Charging on Epoxy Spacer at DC Stress in Compressed SF6 Gas

Surface Charging On Epoxy Spacer At Dc Stress In Compressed SF6 GAS

Role of ion sources for spacer charging in SF₆ gas insulated HVDC systems

Initial conditions of surface charge accumulation under impulse voltage

Investigations of surface charging of DC insulator spacers

Spatio-temporal development of surface charges on spacers stressed with DC voltages

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