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Computation of over voltage for insulation coordination of gas insulated substation
2017 Third International Conference on Science Technology Engineering & Management (ICONSTEM), 2017Protection of transformers and other system equipments against transient over voltages resulting from lightning or other causes is an important consideration in power system design. For insulation co-ordination in transmission lines and substation equipments, it is necessary to accurately predict the lightning surge over voltage that occur in power ...
S. Sakthi +4 more
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Insulation Coordination of UHV Substations
2017With the high voltage level and large transmission capacity, the UHV power grid has a very important position in the system. Therefore, compared to the power grid of low voltage levels, the insulation coordination of the UHV power grid has its particularity.
Fei Su, Hao Zhou, Yang Li
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Insulation coordination of MV power cables
IEEE Transactions on Power Delivery, 1999In medium voltage power cables, the concept of cost/reliability has been current since the end of the 1980s when the Brazilian Standards introduced ethylene-propylene-rubber (EPR) insulated cables, with different thicknesses of insulation for conventional cables and for those with blocked conductors or with water tightness constructions.
M.D.R. Teixeria +2 more
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Coordination compounds with insulating and anticorrosive properties
10th International Symposium on Electrets (ISE 10). Proceedings (Cat. No.99 CH36256), 2003The present paper is a continuation of our studies regarding the synthesis and the properties of some new coordination compounds obtained by the interaction of the "d" block elements acetylacetonates or acetates with diorganophosphinic acids. Its aim is to determine the influence of the metallic cations and of the ligands on the dielectric properties ...
I. Rosca +5 more
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Insulation Coordination for the Future
IEEE Electrical Insulation Magazine, 1986Present dimensioning rules for equipment vary widely from oountry to country. JEC Publications 664 and 664A present a new approach to dimensioning, and equipment built to these new rules has been operated for a number of years.
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Insulation coordination in distribution liveline maintenance
IEEE Transactions on Power Delivery, 1988Insulation coordination principles are applied to assess the expected performance of distribution liveline maintenance equipment. Rubber gloves are used as an example. Breakdown probability distributions for Class II, III, and IV gloves are given for AC and slow-front surge voltages.
G. Gela, M. Balpinarli
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Overvoltage protection and insulation coordination
2015The surge arrester at the line entrance must be installed for the protection from fast-front overvoltages. The selected surge arrester in the simulation model has a sufficient performance for the assumed lightning strike and other conditions. The standard rated lightning impulse withstand voltage can be selected from 1,050, 1,175, 1,300, and 1,425 kV ...
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Insulation Coordination in Gas Insulated Switchgear Against Lightning Overvoltages
1991This paper describes improved models for lightning overvoltage analysis and example results by the models. Reduction of lightning impulse withstand levels for 500 and 275kV gas insulated switchgear substations is recomended. Newly developed high performance metal oxide surge arresters are also presented.
T. Kawamurа, J. Ozawa
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