CalledPermanent Magnet Inflatable CabinetsIs to seal high-voltage components such as busbar, circuit breakers, separation separate, transformers and so on in the shell filled with higher pressure (0.1~0.5MPA) sf6 or other gases in the body

Permanent Magnet Inflatable cabinets bring many inferior benefits, the biggest disadvantage is not affected by the outside environment, such as condensation, filth, small plants and chemicals. Another disadvantage is the use of tight gas insulation (such as sf6, N, or Air), which facilitates the direction of miniaturization. Inflatable cabinets active with good oil-free switches, especially maintenance-free or less maintenance vacuum switches, greatly added maintenance and maintenance obligations

China's topography West high East low, mountain accounted for about 33%, high altitude area accounted for about 26%, the Qinghai-Tibet Plateau uniform elevation of more than 4000m, its north and east of the vast plateau and basin for the elevation of 1000m to 2000m. High altitude regional climate is complex and diverse, when exposed to moist, condensation, salt mist and typhoons, coupled with the Western development of the current, increasingly prosperous industry and transportation, etc., but also make power grid switchgear easy to attack pollution and corrosion

Distribution network using the traditional air insulation switchgear, by the limitations of this environmental conditions, can not meet the requirements, the end gradually updated. 12kV Cabinet Gas insulated metal blocking switchgear (hereinafter referred to as C-GIS), although in China has only started a few years, but because of the small air accumulation, high level of intelligence, maintenance-free, full operating conditions and other characteristics, so that it gradually become a new choice GB ",

In recent years, permanent magnet inflatable cabinets in Sichuan and Yungui and other places have been organized several times a large range of power grid switchgear transformation, the traditional 15-20-year update cycle to change in a swoop to continue frequent updates. In particular, some newly started power grid projects, starting from the design source, choose to configure 12kV C-GIS, in order to meet the necessary conditions that can still be used normally in a certain period of time. At present, C-GIS in metallurgy, petrochemical, mining, development zones, urban rail transit and high-rise construction and other areas of the use of more and more.