摘要
为了解真空灭弧室的绝缘性能,通过对72.5kV真空灭弧室试品的冲击耐压试验以发现规律、分析其影响因素并改进绝缘结构。试验表明,其内部绝缘击穿并非发生在触头间隙,而是触头背部与主屏蔽罩间的间隙放电。增大触头边缘与背部过渡处的圆弧半径后,提高了耐压水平。进一步提出126kV真空灭弧室内部绝缘结构的设计方案,计算了电场分布情况并用真空灭弧室绝缘击穿的统计特性分析其耐压特性。
Because of great harmfulness of greenhouse effect, SF6 gas has to be limited, and it is necessary to develop high voltage vacuum circuit breaker to replace SF6circuit breaker. A key technology is insulating characteristic of vacuum interrupter. For 72.5 kV vacuum interrupter, impulse voltage test is carried out to find out influential factors on its insulating performance and insulating structure is improved. As a result, a design of 126 kV vacuum interrupter is presented and electric field distribution is calculated. Based on statistical property of breakdown in high voltage vacuum interrupter, its voltage withstand capability is analyzed.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2005年第6期6-8,18,共4页
High Voltage Engineering
关键词
高电压
真空灭弧室
绝缘结构
high voltage
vacuum interrupter
insulating structure
