Some Physical Properties of Electrical Discharges on Contaminated-Surfaces

Nasser, Essam

doi:10.1109/tpas.1968.292070

Cited by 22 publications

(8 citation statements)

References 5 publications

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“…Step 2: The tips of triangular waveform become sharper and lengthen when some visible point discharges occur [26], with a continuous sound near the cap on the upper surface (dry band formation occurs during stages 1 to 3).…”

Section: Leakage Current Waveforms During Flashovermentioning

confidence: 99%

“…Step 3: The leakage current waveform becomes similar to the symmetrical wave in the presence of linear filamentary weak local arcs (streamer or partial discharge [26]) in five or six spots near the cap on the upper surface.…”

Section: Leakage Current Waveforms During Flashovermentioning

confidence: 99%

“…Moreover, there are variety methods in which detection of the insulator conditions and prediction of flashover have been considered [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In [9], peak amplitude changes of the leakage current has been assumed as a criterion to detect the critical conditions in insulators.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Detection of Critical Conditions in Ceramic Insulators Based on Harmonic Analysis of Leakage Current

Palangar

Mirzaie

2016

Electric Power Components and Systems

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Section: Leakage Current Waveforms During Flashovermentioning

confidence: 99%

Section: Leakage Current Waveforms During Flashovermentioning

confidence: 99%

See 1 more Smart Citation

Detection of Critical Conditions in Ceramic Insulators Based on Harmonic Analysis of Leakage Current

Palangar

Mirzaie

2016

Electric Power Components and Systems

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“…The data acquisition system of the second Dow Corning fog chamber was described in [31] by Reynaert, Orbeck and Seifferly The data acquisition system of the fog chamber at the University of Windsor was discussed in [ A full paper written by Kawa, Chavez (Dow Corning), Orbeck and Lumb [Sediver) was devoted to a practical Pc-based data acquisition system for the measurements of leakage current pulses applied to fog chambers [81]. The paper gave a detailed system description, with details on sampling rates, filtering, graphic displays, protection circuits, and software methods.…”

Section: Data Acquisition Systemsmentioning

confidence: 99%

Utilization of fog chambers for non-ceramic outdoor insulator evaluation

Sebo

Zhao

1999

IEEE Trans. Dielect. Electr. Insul.

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Non-ceramic (polymer, composite) insulators consist of a fiberglass core rod, weathershed housing, and metal end fittings. The housings generally are manufactured from polymeric materials. In service, the weathershed materials may be subject to degradation or aging due to harsh environmental conditions. One of the most commonly used laboratory tests to evaluate the performance of the weathershed materials is to employ fog chambers. Design and operational features of various fog chambers are reviewed in this paper, including size and main layout of fog chambers and their HV sources, data acquisition systems, systems for simultaneous visual observations and electrical measurements, and test cycles and techniques.

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“…Later the normalized voltage values were studied [5], the values of the contaminant solution flow more adequate for tests in cylindrical samples. The choice of the flow to be standardised took into consideration the cintillations (indication of material degradation) all test long.…”

Section: Experimental Assemblymentioning

confidence: 99%

A contribution to the improvement of ASTM-D2303 polymer covered cable testing

Dirani

Pinheiro²,

Nachvalger³

et al.

Proceedings of Conference on Electrical Insulation and Dielectric Phenomena - CEIDP '96

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The use of polymers covered cables for medium voltage electricity distribution grids is an attractive option in Brazil thanks to their low cost and simplicity in installation. Owing to the fact that there are not controlling electric fieldsin those cables, they present surface currents in their polymeric covers which are reponsible for electric tracking and erosion. This p p e r describes a methology of electric tracking test of polymeric material covers of cables using actual cables in contrast with the methodology which uses slab shaped test bodies. The advantage of this new method is that it makes possible, working with the cylindrical shaped samples, to have a more realistic evaluation of the cable, in comparison with the former method which gives only information abaout the polymeric material without taking into consideration all the stresses and possible contamination due to the cable fabrication processing. The starting procedures were taken from the ASTM-D2303 standard for testing slab shaped polymer test bodies. The influences of the test related parameters like contaminant solution flow, sample preparation, electrode shape and others were studied.This method permits to correlate the events with the degradation of the polymeric material through the analysis of the electrical current waveshape.

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Some Physical Properties of Electrical Discharges on Contaminated-Surfaces

Cited by 22 publications

References 5 publications

Detection of Critical Conditions in Ceramic Insulators Based on Harmonic Analysis of Leakage Current

Detection of Critical Conditions in Ceramic Insulators Based on Harmonic Analysis of Leakage Current

Utilization of fog chambers for non-ceramic outdoor insulator evaluation

A contribution to the improvement of ASTM-D2303 polymer covered cable testing

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