Breakdown Measurement of N2O Mixtures with CO2, N2, 02 in Uniform Electric Fields

Breakdown strength in uniform electric fields of N
2
O mixtures with CO
2
, N
2
, and O
2
is measured under AC voltage stress, 300 kPa pressure, and electrode separation of 5 mm. The obtained results show the best synergism of 115% for N
2
O/CO
2
30/70 mixture. For high electric strength of mixtures, a high fraction of N
2
O is beneficial, but is limited by the oxidizing power. Considering this limit, a N
2
O/CO
2
49.1/50.9 mixture can be used with the electric strength 135% of synthetic air and 45% of SF
6
, respectively.