Guo Zengji Liu Yanqin Guo Xiangyu. Test Researches of HV AC Vacuum Circuit Breaker Interrupting DC Circuit[J]. High voltageapparatus, 1996, (3): 7-11.DOI:
By artificially producing current zero the single arc-extinguishing chambers of the HV ac vacuum circuit breakers ZN3 -10/600-150
ZN4 -10/1000 - 200 and ZN -10/1 000- 300 have successfully breaked dc current of 8kA
11kA and 15. 5kA respectively
whilst the 25. 8kA/27kV dc circuit is interrupted by 6 chambers in parallel and series. The repeatedly breaking tests of single arc-extinguishing chamber with longuitudinal magnetic field is completed. These results give important information to develop the 50kA/30kV vacuum circuit breaker.