Measuring Technique of SF_6 Decomposition Products and Its Application to Fault Diagnosis of GIS

The method of fault diagnosis and condition evaluation for internal insulation of GIS equipment by measuring SF6 decomposition products is with the advantages of strong anti-interference ability and high sensitivity,so it is applied in the field test of equipment.Different test methods were introduced in this paper.Some on-site analytical methods and instruments were used to the analysis for gas components of GIS after a withstand voltage test.According to the analysis,GIS equipment status evaluation and fault diagnosis can be carried out.