Breakdown　voltage　of　the　nitrogen　insulation　gap　can　be　increased　by　inserting　a　polymer　barrier　to　form　a　hybrid　nitrogen-barrier　insulation　system.　In　this　article,　the　effect　of　barrier　position　on　the　breakdown　voltage　of　a　hybrid　insulation　system　is　investigated　at　different　gas　pressures.　Reducing　the　distance　from　the　barrier　surface　to　the　rod　electrode　leads　to　higher　breakdown　voltages　at　gas　pressures　in　the　range　of　0.1-0.25　MPa.　Additionally,　the　breakdown　field　strengths　of　the　insulation　gaps　at　different　gas　pressures　are　studied.　When　the　barrier　is　placed　near　the　plate　electrode,　the　breakdown　field　strength　shows　a　linear　increase　with　increasing　gas　pressure.　Furthermore,　the　breakdown　paths　in　the　hybrid　insulation　systems　can　be　classified　into　two　types.　The　breakdown　voltages　of　the　two　path　types　are　close.　A　prediction　model　of　the　breakdown　voltages　at　different　pressures　based　on　the　breakdown　path　is　proposed.　The　proposed　model　is　also　suitable　for　hybrid　insulation　systems　with　different　size　barriers.　The　barrier　with　lower　relative　permittivity　and　higher　resistivity　tested　in　this　article　has　a　more　significant　effect　on　increasing　the　breakdown　voltage.　The　influences　of　the　barrier　surface　charge　on　the　electric　field　and　breakdown　processes　are　also　discussed.