Results 181 to 190 of about 127,048 (210)

Conduction current measurements on XLPE and EPR insulation

The 17th Annual Meeting of the IEEE Lasers and Electro-Optics Society, 2004. LEOS 2004., 2004
Electrical conduction of crosslinked polyethylene (XLPE) and ethylene propylene rubber (EPR) is studied by means of DC charging current measurements. The threshold for space charge accumulation and the DC conductivity of XLPE and EPR have been investigated at different electric fields and at different temperatures.
R. Bodega, MONTANARI, GIAN CARLO, P. H. F. Morshuis   +2 more
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An Investigation into the Growth of Electrical Trees in XLPE Cable Insulation

IEEE Transactions on Electrical Insulation, 1979
This paper describes the effects of frequency, voltage, temperature and mechanical stress on the times to breakdown of XLPE cable insulation subjected to highly divergent fields. Temperature and mechanical stress reduce the times to breakdown but tests with increasing voltage and high frequency produced unexpected results which could not be explained ...
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Quantifying degradation of XLPE insulated distribution cables

IEEE Power Engineering Society General Meeting, 2004., 2004
This work quantifies the degradation of XLPE insulated distribution cables in terms of electrical breakdown voltage using a needle plane geometry and area for FTIR spectroscopy. These identified parameters can be used to estimate the remaining useful life of cables and to optimize the cable replacement schedules.
S.B. Dalal, R.S. Gorur, M.L. Dyer
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Location and examination of defects in XLPE cable insulation

Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics, 2003
After breakdown testing of a cable it is difficult to identify the cause of the breakdown, because the insulation in the region of breakdown is usually heavily damaged. The authors describe an approach in which the insulation from cables extruded under normal conditions is peeled to form continuous lengths of thin tape.
S.T. Hagen, E. Ildstad, J. Sletbak, H. Faremo   +3 more
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Effect of water content on the conductivity of XLPE insulation

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2012
In HVDC cable insulation, the steady state electric field distribution is mainly determined by the following factors: DC conductivity, charge trapping, electron injection and ion formation. Factors which contribute strongly depend upon changes in morphology and chemical features within the insulation.
Torbjorn Andersen Ve, Frank Mauseth, Erling Ildstad   +2 more
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Dielectric properties of water-treed XLPE insulation

Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP'94), 2002
Attention has been recently been turned to different methods for measurement of dielectric response and charge storage phenomena to develop sensitive non destructive tools for XLPE cable insulation. Such measurements are usually performed as "frequency domain" measurements of the capacitance and loss factor, or as "time domain" measurements of the ...
E. Ildstad, S.M. Gubanski
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Thermal endurance evaluation of XLPE insulated cables

Journal of Physics D: Applied Physics, 1991
Thermal endurance characterization of XLPE cable models is realized by applying conventional procedures and an analytical method. The latter method is based on oxidation induction time measurements to estimate the activation energy of the degradation reaction and then the slope of the thermal endurance line.
G C Montanari, A Motori
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Cables XLPE-insulation Residual Life Monitoring

2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2018
Cable insulation is the most destructible element of the cable system. Therefore, insulation materials aging research continues to be one of the topical problems. However, it is possible not only to calculate the insulation life but also to monitor its residual life. The paper describes a technique of the cable XLPE-insulation residual life monitoring.
D. A. Polyakov, D. A. Yurchuk, K. I. Nikitin   +2 more
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Oxidation and water treeing in XLPE cable insulation

Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1986, 1986
It is well known that polymer insulated high-voltage cables experience a form of degradation in service referred to as water treeing. Small tree-like growths consisting of water-filled microvoids, slowly grow in an electrically stressed insulation exposed to moisture causing a reduction in the breakdown strength.
Garton, A., Bamji, S. S., Bulinski, A. T., Densley, R. J.   +3 more
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Voltage endurance of XLPE insulated cable models

1984 IEEE International Conference on Eletrical Insulation, 1984
In this paper the first results of a life - test run on XLPE insulated cable models are reported.
G.C. Montanari, P. Pattini, L. Simoni
openaire   +1 more source