Results 181 to 190 of about 1,373 (216)

Alternative insulation gas for medium-voltage switchgear

2016 Petroleum and Chemical Industry Conference Europe (PCIC Europe), 2016
Although the contribution of SF6 (sulfur hexafluoride) emissions from gas insulated medium-voltage switchgear to man-made global warming is very small, an eco-efficient insulation gas will contribute to a reduction in the carbon footprint of the electricity grid.
Maik Hyrenbach, Sebastian Zache
openaire   +1 more source

Development of 800 kV gas-insulated switchgear

IEEE Transactions on Power Delivery, 1992
An 800 kV gas-insulated switchgear, with a capacity level recognized as the largest in the world, was developed as the first development of UHV gas-insulated switchgear, and good results were obtained in the type tests for this switchgear. With the gas circuit breaker and the disconnector used in this gas-insulated switchgear, tests on a scale ...
H. Toda, Y. Ozaki, I. Miwa, S. Nishiwaki, Y. Murayama, S. Yanabu   +5 more
openaire   +1 more source

Insulation Coordination in Gas Insulated Switchgear Against Lightning Overvoltages

1991
This 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
openaire   +1 more source

Determination of Sensor Position on 150 kV Gas Insulation Switchgear

2019 International Conference on Electrical Engineering and Informatics (ICEEI), 2019
Gas insulated switchgear is one of the important equipment in electric power system. Gas insulated switchgear can run into a malfunction that begins with the presence of partial discharge. Various methods have been developed to detect the presence of partial discharge.
Umar Khayam, Arpan Zaeni, Herlin Agustina   +2 more
openaire   +1 more source

Coupling Devices for the Detection of Partial Discharges in Gas-insulated Switchgear

IEEE Power Engineering Review, 1981
Partial discharge in gas-insulated 8witchgear is indicative of serious malfunction and, otten, imminent failure. Partial discharge magnitudes range from zero to about a microcoulomb per pulse. Sources of partial discharge can be detected acoustically, electromagnetically or through gas analysis.
S.A. Boggs, G.L. Ford, R.C. Madge
openaire   +1 more source

Study on oxygen/nitrogen gas mixtures for the surface insulation performance in gas insulated switchgear

IEEE Transactions on Dielectrics and Electrical Insulation, 2015
This paper presents a comparative study on SF6 alternative candidate gases for the surface insulation performance of eco-friendly Gas Insulated Switchers (GIS) and Solid Insulated Switchers (SIS). The candidate gases including N2/O2 mixture gas, dry air, and compressed air were proposed based on AC surface flashover experiment.
Dong-Young Lim, Sungwoo Bae
openaire   +1 more source

Influence of Arc-Decomposed SF6 Gas on Cast EPOXY Insulators for Gas Insulated Switchgears

IEEE Transactions on Power Apparatus and Systems, 1979
Reactions between arc decomposed gases and cast epoxy insulators used in gas insulated switchgears are very important and interesting phenomena to be investigated for engineers and designers.
Shotaro Tominaga, Hiroshi Kuwahara, Koichi Hirooka   +2 more
openaire   +1 more source

Transient electric field analysis of disk insulator for Gas insulated switchgear

2013 2nd International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST), 2013
Fourier transform are used on the very fast transient overvoltage (VFTO) discretion, different spectral components of transient voltage waveform are achieved. The mathematical model of the transient electric field is deduced considering dielectric polarization loss and displacement current.
Zhenxin Geng, Xin Lin, Binge Si
openaire   +1 more source

Breakdown voltage-time characteristics and insulation testing of gas insulated switchgear

IEEE Transactions on Dielectrics and Electrical Insulation, 2008
There is not sufficient data on the breakdown voltage-time characteristics for gas insulated swiitchgear (GIS) at power-frequency voltages, especially in the long-term region, for complete insulation specifications to be developed. This paper gives voltage- time breakdown characteristics for a 72-kV GIS at power-frequency voltages, both for clean ...
Shigemitsu Okabe, Jun Takami, Toshihiro Tsuboi   +2 more
openaire   +1 more source

Gas insulated switchgear for medium voltage substations

IEE Colloquium on GIS (Gas-Insulated Switchgear) at Transmission and Distribution Voltages, 1995
High reliability and staff safety is the most important factor a modern medium voltage switchgear has to comply with. Together with the requirement for space-saving design, mainly in European countries, the development of switchgear models finally resulted in the most advantageous type of gas insulated switchgear.
openaire   +1 more source