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Ø Highest system voltage: 72.5kV Ø Rated frequency: 50Hz Ø Rated current: 1250, 2000, 2500,3150,4000A Ø Rated short circuit breaking current: 31.5,40KA( MAX design can reach 50KA) Ø Rated short circuit making current (peak): 100,80KA Ø Ø
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Chemical formula: SF₆Melting point: −64 &C; −83 &F; 209 KMolar mass: 146.06 g/molSolubility in water: 0.003% (25 &C)OverviewSulfur hexafluoride (SF6) or sulphur hexafluoride (British spelling), is an extremely potent and persistent greenhouse gas that is primarily utilized as an electrical insulator and arc suppressant. It is inorganic, colorless, odorless, non flammable, and non toxic. SF 6 has an octahedral geometry, consisting of six fluorine atoms attached to a central sulfur atom. It is a hypervalent molecule. Typical for a nonpolar gas, SF 6 is poorly soluble in water but quite soluble in nonpolar organic solvents. It has a density of 6.12 g/L at sea level conditions, considerably higher than the density of air (1.225 g/L). It is generally transported as a liquefied compressed gas. The concentration of SF 6 in Earth's troposphere reached 10 parts per trillion (ppt) in year 2019, rising at 0.35 ppt/year. The increase over the prior 40 years was driven in large part by the expanding electric power sector, including fugitive emissions from banks of SF 6 gas contained in its medium and high voltage switchgear. Uses in magnesium, aluminum, and electronics manufacturing also hastened atmospheric growth.
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20kv 24kv Switchgear Gis 11KV 13.8KV 15KV 20KV 24KV 33KV 35KV 36KV SF6 Gas Insulated Switchgear GIS Ring Main Unit RMU Panel US $6500 $8000 / Piece 1 Piece (Min. Order) 1 YRS Zhejiang Zhegui Electric Co., Ltd. Contact Supplier Ad Gis GIS 1
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Insulation values above this level for the lines and equipment in the system must be so coordinated that specific protective devices operate satisfactorily below that minimum level. In the design of lines and equipment considering the minimum level of insulation required, it is necessary to define surge voltage in terms of its peak value and return to lower values in terms of time or duration.
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Gas insulated high voltage switchgear (GIS) is a compact metal encapsulated switchgear consisting of high voltage components such as circuit breakers and disconnectors, which can be safely operated in confined spaces. GIS is used where space is limited, for example, extensions, in city buildings, on roofs, on offshore platforms, industrial
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1995/5/30IEC 61640 : 1.0. RIGID HIGH VOLTAGE, GAS INSULATED TRANSMISSION LINES FOR RATED VOLTAGE OF 72,5 KV AND ABOVE. NF EN 60376 : 2005. SPECIFICATION OF TECHNICAL GRADE SULFUR HEXAFLUORIDE (SF6) FOR USE IN ELECTRICAL EQUIPMENT. DIN EN 45510 2 7:2003 12.
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2019/9/181 Mechanical tests: Gas Leakage and Gas Quality (Moisture, Purity, and Density): All gas compartments shall be filled with sulfur hexafluoride gas ( SF6 ) or a required gas mixture to the manufacturer's required rated filling pressure and tested to detect any gas leaks.An initial test is performed to detect any and all gas leaks and ensure compliance with the specified maximum gas leak rate.
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our company provides SF6 gas bottles and SF6 containers for new gas (IEC 60376) and for used SF6 gas (IEC 60480) for safe gas storage during transport. Important note Use: The SF 6 gas is to be stored in reuse cylinders (yellow marked and hazard label 2.3 + 8 in accordance with ADR) if:
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