| 1. | The test result indicates that 126kv / 31 . 5ka self - energy sf6 cb has excellent opening character and also proves the reasonability of arc - quenching chamber structure design
试验结果表明126kv31 . 5ka自能式断路器具有良好的开断性能，也证实了此灭弧室结构设计的合理性。 |
| 2. | In addition , electric field distribution of arc - quenching chamber is calculated in adopting anasys software and the largest electric field intention is analyzed under the impulsion voltage and infrequency voltage , then the size of insulation porcelain cover is determined
采用anasys软件计算了灭弧室电场分布，并对冲击电压和工频电压下的最大电场强度进行了分析，确定了绝缘瓷套的尺寸。 |
| 3. | So the operation machine only provides kinetic energy needed for contactor moving , then operation power is decreased largely and machine is simplified . consequently the structure and size of arc - quenching chamber are decreased and reliability of cb is improved greatly
这样操动机构仅需提供触头运动所需要的动能，从而大大减少了操作功，简化了机构，减小了灭弧室的结构尺寸，大大提高断路器的可靠性。 |
| 4. | In these years , sf6 gas is widely used in the high voltage circuit breaker because of its excellent insulating and arc - quenching character . it is very meaningful to optimize the design of circuit breaker and save the expenditure of test by using the computer auxiliary computation
由于sf _ 6气体具有优良的绝缘性能和灭弧性能，近年来sf _ 6气体越来越广泛地应用于高压断路器中。利用计算机辅助计算模拟开断过程中灭弧室内的气流场特性对于优化断路器的设计及节约试验费用具有重要的意义。 |
| 5. | So the development of self - energy sf6 cb is very important . in the paper , the math model of arc - quenching chamber air - pressure character is built on the base of 126kv / 31 . 5ka self - energy sf6 cb ' s exploiting , then the theory analysis and calculation is deeply been done for cylinder radius , nozzle spout radius and opening position of moved contact that they have the essential effect for the use of arc energy in the course of opening . arc - quenching chamber parameter is confirmed according to the request of full opening and fault opening when the cb is opening
本文针对126kv31 . 5ka自能式sf _ 6断路器的研制，建立了相应的灭弧室气压特性数学模型，对自能式sf _ 6断路器开断过程中电弧能量利用有重要影响的灭弧室缸径、喷口直径、动触杆开口位置进行了详细深入的理论分析和计算，并根据断路器开断中的满容量开断和近区故障开断的要求确定了灭弧室参数。 |
| 6. | It is a very high advancement to the development from two - pressure arc - quenching chamber and single - pressure arc - quenching chamber to the self - energy arc - quenching chamber now for arc - quenching theory of sf6 cb make use of the arc blocking effect , namely arc - self - energy , to increase sf6 gas pressure in the arc - quenching chamber and get the efficient blasting effect to extinguish the arc when the arc current is zero
Sf _ 6断路器从双压式、单压式发展到如今的自能式是断路器灭弧原理的一个重大飞跃。自能式sf _ 6断路器利用电弧阻塞效应即利用电弧本身的能量使灭弧室内sf _ 6气体的压力升高，在电弧过零时产生有效的气吹而熄灭电弧。 |
