02-05-2011, 03:19 PM
superior technology and excellentknowhow ensure quality and reliability
Siemens GIL systems are based on thesuccessful SF6 tubular conductor technology,which has been around for severaldecades. GIL consist of a central aluminumconductor with a typical electrical crosssection of up to 5,300 mm2. The conductorrests on cast resin insulators, which centerit within the outer enclosure. This enclosureis formed by a sturdy aluminum tube,which provides a solid mechanical andelectrotechnical containment for the system.To meet up-to-date environmentaland technical aspects, GIL are filled withan insulating gas mixture of mainly nitrogenand a smaller percentage of SF6. Forincreased lifetime, the “performance line”product series has a longitudinal particletrap installed over the entire horizontalroute section. An automated orbitalwelding procedure, accompanied bytailored ultrasonic inspection techniques,ensures perfect gastightnessof the aluminum tubes.During service, the fully encapsulateddesign fully protects the GIL againstenvironmental influences. Thanks to thetechnologically clear-cut, logical designand the use of high-quality materials,an absolutely maintenance-free productis achieved which requires externalinspection only. And at the end of itsservice life, the issue of de-installationis solved. The GIL tubular system withall its components and the insulationgas mixture are 100 percent recyclable.These factors help to minimize lifetimecosts.
Impressive practical record: GIL systemin Germany’s Wehr power plant
Siemens installed a GIL in a tunnel inthe Wehr pumped-storage power stationin the Black Forest as long ago as 1975.With a single-phase length of almost 4 kmthis installation is still a significant referenceamong worldwide GIL projects. Notwithstandingits service time, an inspectionafter 30 years showed that all componentswere still in top condition, and assuredthe customer that GIL will provide manymore years of reliable operation.
download full report
http://www.energy.siemenshq/pool/hq/powe.../GIL_e.pdf
Siemens GIL systems are based on thesuccessful SF6 tubular conductor technology,which has been around for severaldecades. GIL consist of a central aluminumconductor with a typical electrical crosssection of up to 5,300 mm2. The conductorrests on cast resin insulators, which centerit within the outer enclosure. This enclosureis formed by a sturdy aluminum tube,which provides a solid mechanical andelectrotechnical containment for the system.To meet up-to-date environmentaland technical aspects, GIL are filled withan insulating gas mixture of mainly nitrogenand a smaller percentage of SF6. Forincreased lifetime, the “performance line”product series has a longitudinal particletrap installed over the entire horizontalroute section. An automated orbitalwelding procedure, accompanied bytailored ultrasonic inspection techniques,ensures perfect gastightnessof the aluminum tubes.During service, the fully encapsulateddesign fully protects the GIL againstenvironmental influences. Thanks to thetechnologically clear-cut, logical designand the use of high-quality materials,an absolutely maintenance-free productis achieved which requires externalinspection only. And at the end of itsservice life, the issue of de-installationis solved. The GIL tubular system withall its components and the insulationgas mixture are 100 percent recyclable.These factors help to minimize lifetimecosts.
Impressive practical record: GIL systemin Germany’s Wehr power plant
Siemens installed a GIL in a tunnel inthe Wehr pumped-storage power stationin the Black Forest as long ago as 1975.With a single-phase length of almost 4 kmthis installation is still a significant referenceamong worldwide GIL projects. Notwithstandingits service time, an inspectionafter 30 years showed that all componentswere still in top condition, and assuredthe customer that GIL will provide manymore years of reliable operation.
download full report
http://www.energy.siemenshq/pool/hq/powe.../GIL_e.pdf