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ewz Oerlikon substation, Switzerland - Hitachi ABB Power Grids ABB Power Grids has commissioned the world's first high-voltage and medium-voltage gas-insulated switchgear (GIS) installation with a new eco-efficient gas mixture as an alternative to sulfur hexafluoride (SF6) gas for ewz, a power utility in Switzerland.
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STANDARD SPECIFICATIONS FOR CONSTRUCTION WORKS 2008· PDF fileOff-load tappings shall be provided on higher voltage winding for a variation of ± 2.5% and ± 5% of the primary voltage. Fire behaviour class shall be provided to BS EN 50464; Class F1 or Class F2 18.104.22.168 HV Switchgear HV switch and control gear shall be provided in accordance with the Electricity
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Circuit breakers SF 1 to 40.5 kV SF6 switchgear· PDF fileLike all gases in current use, SF6 is available in all countries of the world. SF6 is non-toxic. a non-inflammable gas SF6 is an inert gas and does not sustain combustion. a very stable gas The high stability of SF6 gas is due to the 6 covalent bonds of its molecule. an insulating gas The dielectric strength of SF6 is …
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Medium-voltage product offer· PDF fileMV Gas-insulated switchgear (GIS) CBGS-0 SF6 circuit breaker switchgear Ratings/features • Up to 38 kV, 2,000 A, 31.5 kA, and 150 kV BIL • Compact design 24" W for mains/feeders and 48" W for tie • Fixed vacuum or SF6 circuit breaker • Solid insulated and shielded bus bar system • Internal arc tested 31.5 kA/1 s per IEC 62271-200
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Medium voltage switchgear - Schneider Electric· PDF file> Since 1960, SF6 (sulfur hexafluoride) is used in electrical equipment (switchgear and devices) and also in other applications like arc furnaces, window insulation, car tires and sport shoes! > SF6 is used in electrical equipment because of its dielectric strength, excellent insulating properties and its arc-suppression capabilities.
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Medium Voltage Indoor Switches and Disconnectors | ABB US and gas insulated switches, disconnectors, isolators and earthing switches up to 38.5 kV for indoor operation in MV switchgear or compact substation. Air-insulated switch disconnectors are suitable for cable sectionalizer, transformer and motor circuit switching, in secondary distribution substations for supplying lines, transformers and ring networks, can be combined with
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