The exhaust characteristics at high current duty of a breaker terminal fault for a gas circuit breaker are evaluated. A method of designing the exhaust chamber so that the exhaust temperature is less than the threshold temperature is then proposed. The threshold temperature is the value at which the maximum electric field of the exhaust chamber coincides with the critical electric field. In the design, the initial value of the structure is determined so as to decrease the number of trials in the development process. The calculation time of the numerical analysis is reduced by combining a one-dimensional (1-D) arc simulation with a two-dimensional (2-D) gas flow simulation of only the exhaust parts. An optimal design of an exhaust chamber using this design method is described as an example. In the interruption test of 63 kA using the optimal structure, dielectric strength was ensured and no flashovers occurred in any opening area.

中文翻译：

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评估高压断路器排气特性的方法

评估了气体断路器断路器端子故障在高电流负载下的排气特性。然后提出了一种设计排气室以使排气温度低于阈值温度的方法。阈值温度是排气室的最大电场与临界电场重合时的值。在设计中，确定结构的初始值，以减少开发过程中的试验次数。通过将一维 (1-D) 电弧模拟与仅排气部分的二维 (2-D) 气流模拟相结合，可以减少数值分析的计算时间。以使用这种设计方法的排气室的优化设计为例进行说明。