SF

6

is currently the most widely used insulating gas

but the GWP of SF

6

is extremely high and not easy to be degraded

the use of SF

6

/N

2

gas mixture can effectively reduce the use of SF

6

and thus reduce the impact of greenhouse effect. Therefore

this paper carries out the corona discharge decomposition experiment of SF

6

/N

2

gas mixture

under the consideration of micro-water and micro-Oxygen

detects the products and analyzes the trend of content change by using chromatography

and draws out the influence law of different external conditions on the decomposition products. The experimental results show that: SF

6

/N

2

gas mixture decomposition products under corona discharge in SO

2

F

2

and SOF

2

with time has an obvious linear increase trend

CO and CH

4

volume fraction and discharge time has no obvious change trend

CO

2

N

2

O

NF

3

SO

2

and H

2

S with the discharge time increased slightly

but compared with SOF

2

and SO

2

F

2

change rule is not obvious. After the voltage is increased

the corona discharge energy will be enhanced

which will promote the decomposition of SF

6

/N

2

gas mixture. The increase of air pressure will inhibit the decomposition of SF

6

/N

2

. The increase of micro-water or micro-Oxygen content will make the volume fraction of SO

2

F

2

and SOF

2

increase

and the effect on SO

2

CO

2

NF

3

H

2

S and N

2

O is not obvious. The experimental results of this paper lay a foundation for the rapid identification and response of internal faults of SF

6

/N

2

mixed gas insulation equipment.