In the power industry, SF6 gas is used for insulation and/or arc extinguishing in four types of electrical equipment; SF6 circuit breaker and GIS (referring to here)sf6Closed combination electrical appliances, internationally known as "Gas Insulated Switchgear", SF6 load switchgear, SF6 insulated transmission pipelines, SF6 transformers, and SF6 insulated substations.

80% SF6 gas is used for high and medium voltage electrical equipment. During operation in power equipment, electric arcs can cause sulfur hexafluoride to decompose into various other compounds, which contain toxic and harmful gases. These compounds not only affect equipment operation but also pollute the environment and cause casualties. Therefore, the detection of operating gas has become an indispensable and important task for units using sulfur hexafluoride as insulation gas in power equipment.

Portable sulfur hexafluoride decomposition product chromatographic analyzerUsing the principle of helium ionization gas chromatography, a single injection is completed to analyze the SF6 gas used for insulation in power equipment H2、O2、N2、CH4、CF4、CO、CO2、C2F6、C3F8、SO2F2、SOF2、SO2、H2S、COS、CS2、NF3、N2O The comprehensive analysis of 17 decomposition products provides data support for determining whether there are latent faults such as spark discharge, arc discharge, gap breakdown, corona, and surface discharge in GIS and other inflatable power equipment.

Portable sulfur hexafluoride decomposition product chromatographic analyzerAccording to the standard:

GB/T 12022Industrial sulfur hexafluoride

Q/GDW 1168Regulations for State Maintenance and Testing of Power Transmission and Transformation Equipment

Q/GDW 11096Gas chromatographic analysis method for SF6 gas decomposition products

DLT 1205Test Method for Decomposition Products of Sulfur Hexafluoride Electrical Equipment

DL/T 941Quality Standard for Sulfur Hexafluoride Used in Running Transformers

DL/T 1366-2014Sulfur hexafluoride gas for power equipment

IEC 376B (1974)Second Supplement to the Specification and Acceptance of New Sulfur Hexafluoride

IEC 60480-2004 Guidelines for the checking and treatment of sulfur hexafluoride (SF6) taken from electrical equipment and specification for its re-use

Portable sulfur hexafluoride decomposition product chromatographic analyzerDetection range and detection limit (μ L/L)

​Portable sulfur hexafluoride decomposition product chromatographic analyzerTechnical performance:

Analysis cycle:<20min

Error:<3%

Stable time:<30 minutes

Working environment: -30~50 ℃