Most of the domestic circuit breaker products are worked under 50 Hz power frequency

foreign circuit breaker products are worked under 60 Hz power frequency.In order to meet the requirements of 60 Hz operating conditions in foreign countries

especially in North America

the investigations of interrupting performance under 60 Hz condition need to be carried out urgently.In this paper

an interruption simulation model of 252 kV self-blastcuit breaker is built

the characteristics and the differences of interruption under different power frequency are acquired for the same product.The gas temperature and gas flow field at different power frequency 50 Hz and 60 Hz are simulated and compared

much attention is paid to the comparison of arc characteristics and arc conductor under the two frequencies during current passing zero.The simulation results show that blowing strength of cooling gas to the arc 50 Hz is stronger than that 60 Hz during current passing zero

due to the pressurization within the expansion chamber is not matched to the arc energy for extinguishing under the 60 Hz.The arc performance and arc conductor under the 50 Hz is better than the 60 Hz at the current zero time

50 Hz is easier to extinguish.50/60 Hzself-blast type SFcircuit breakerarc modelarc conductor