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2020/10/28After drying out of the switchgear, proper oil level or proper pressure of SF6 gas needs to be maintained as per the manufacturer's recommendations. In many designs, poles are filled with nitrogen gas above atmospheric pressure (1.5/2 times of the atmospheric pressure) to avoid breathing of moist air.
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Background of The InventionBrief Summary of The InventionBrief Description of The DrawingsDetailed Description of The Preferred EmbodimentsThis invention relates generally to the field of remote sensing, and more specifically to a machine for detecting sulfur hexafluoride (SF6) leaks using a carbon dioxide (CO2) laser and the infrared differential absorption lidar (DIAL) technique and process for making same. Sulfur hexafluoride (SF6) is an excellent insulator widely used in the electric power industry, primarily in high voltage switches. However, SF6 is a significant green house gas, 23,900 times more damaging than carbon dioxide, and is costly to the utility industry. Therefore, the electric utility industry regularly inspects its transmission facilities for SF6 leaks. In the past, detecting leaks was a crude process utilizing visual inspection methods, which is time consuming and expensive. Recently, laser based SF6 inspection tools have become available. The current commercial state of the art is the "GasVue" line of laser based SF6 inspection systems produced by Laser Imaging Systems (LIS) of Florida. In particula...See more on freepatentsonlineCited by: 28Author: Parviz Parvin, Hasan KariminejadPublish Year: 2006SF6 LeakCheck P1:P Sulfur Hexafluoride Leak Detector | Gastech gastech/sf6 leakcheck p1pSF6 LeakCheck P1:P The SF6 LeakCheck P1:p is an award winning SF6 leak detector ensuring fast accurate detection at ultra sensitive levels. SF6 LeakCheck P1:p is a revolution in SF6 leak detection, ensuring incredibly fast searching at ultra sensitive levels.
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2021/8/28Siemens had the complete solution: The 8DJH 12 blue GIS switchgear is equipped with Clean Air and the reliable and proven vacuum interrupter technology, offering all advantages of a gas insulated switchgear at the same time. The SF6 free and maintenance free switchgear offers lower operating costs combined with a high degree of low voltage
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2011/1/6SF6 gas as insulating and arc quenching medium. Sulphur hexafluoride gas (SF6) is employed as insulation in all parts of the installation, and in the circuit breaker also for arc quenching. SF6 is an electronegative gas, its dielectric strength at atmospheric pressure is approximately three times that of air.
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A gas insulated switching apparatus comprising a breaking section having at least a couple of mutually detachable contacts, a grounded tank containing the breaking section and filled with an insulating gas, the grounded tank being maintained at earth potential
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Sulfur Hexafluoride gas is a colorless, odorless, nontoxic, nonflammable gas that is used as an insulating gas in electrical equipment. At atmospheric pressures, sulfur hexafluoride gas sublimes directly from a solid to a gas. It is shipped as a liquefied compressed gas. Sulfur hexafluoride gas is used for leak detection and as a gaseous
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2013/9/7SF6 GIS. The SF6 gas insulated metal enclosed switchgear shall be totally safe against inadvertent touch of any of its live constituent parts. It should be designed for indoor application with meteorological conditions at site (winter 3&C to 14& C and summer 31& C to 46& C, seismic zone: IV) . General Technical Specification For 220kV SF6
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