252kV Gas Insulated Switchgear(GIS) sf6 switchgear
Main features sf6 switchgear
1.Spring mechanism/motor mechanism are adopted to avoid oil and gas to realize simple constrution, easy maintenance and realiable operation. 2.Enclosure is made of aluminium alloy to ensure light weight, low temperature-rise and strong anticorrosion. 3.Double sealing systems are adopted to guarantee high reliability in gas tightness and ensure minimum annual gas leakage. 4.GIS will be delivered as a whole without dismantle to reduce site installation and maintenance works. 5.Safety Two measures are taken to ensure safety of operation personnel Rupture disc is installed on every gas compartment to avoid explosion in over-pressure state. Activating pressure of rupture disc on circuit breaker compartment: 1± 0.06MPa Activating pressure of rupture disc on other compartments: 0.7± 0.04MPa Destructive pressure that enclosure can withstand for circuit breaker compartment: 2.3MPa Destructive pressure that enclosure can withstand for other compartments: 1.6MPa 6.Good insulating ability Insulating barrier is made on production line imported form Hubers Company, Germany. The whole manufacturing process from mixture of fillings to molding are finished in totally sealed and homoiothermal workshop to avoid occurance of air bubble inside insulating barrier. After being kept in heating stove for more than 16 hours, insulating barrier will be conducted X-ray non-destructive test, mechanical test, power frequency withstand test and partial discharge test, then it will be sealing packed and delivered to GIS assembly workshop. 7.Good conducting ability Aluminum alloy conductors are coated with silver up to 24μm to reduce resistance as small as possible. 8.High current carrying performance Copper with silver coat of strong adhesiveness is applied to ensure good current carrying performance and guarantee a long-term service. 9.View window View windows are installed on GIS main components to observe service state inside GIS.