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SF6安全保障专家
专注于SF6气体检测的专业化
Is gas insulated metal enclosed switchgear completely free of SF6 gas?
发布时间：2016-10-23
来源：ydlcb 浏览次数：42次
In theory, SF6 gas is enclosed in sulfur hexafluoride electrical equipment, and there is no possibility of leakage. However, this is not the case, any container equipment can not be 100% sealed, so there must be a leak, sulfur hexafluoride gas leakage is divided into two kinds, one is a natural leak, one is a defect leak, the former is a natural phenomenon, cannot be avoided, and the latter is caused by equipment defects, which can be found and repaired by monitoring means. For the normal leakage amount of sulfur hexafluoride, the relevant standards have clear provisions: GB 8905-2012 "sulfur hexafluoride in electrical equipment gas management and testing guidelines", GB 50150-2006 "Electrical equipment installation engineering electrical equipment handover test standard" and DL/T 596-1996 "Electric equipment preventive test regulations" all stipulate that "each gas chamber annual leakage rate is not more than 1%", DL/T618-2001<< Field handover test Procedure for Gas insulated metal enclosed switchgear >> states that "the annual leakage rate of each gas chamber shall not exceed 0.5%", DL 408-1991<< Code of Work for Electrical Safety (Electrical Parts of Power Plants and substations) >> states that "the content of sulfur hexafluoride gas in the air of working areas shall not exceed 1000PPM". However, in actual operation, the sulfur hexafluoride leakage rate of sulfur hexafluoride electrical equipment may exceed the value specified in the above standards. Only by timely finding the leakage point and confirming the leakage rate can we timely judge whether the electrical equipment meets the standard requirements, timely repair and repair the leakage, and thus reduce the emission of sulfur hexafluoride.