Small model interrupters are convenient to investigate interrupting performance of high‐voltage gas circuit breakers in terms of efficiency. However, the equivalence of interruption phenomena of small model interrupters (e.g., interrupting performance, interruption criteria, and geometric sensitivity) to product‐scale interrupters has not been clarified. Interrupting tests with small and large model interrupters were carried out with the dimensions of the interrupter as parameters to clarify the effects of modified interrupter dimensions on blast pressure and interrupting performance. Arc voltage and arc conductance were measured to acquire detailed electrical behavior in the thermal interrupting phase. In the results, small model interrupters showed the same performance trends as geometrically modified large model interrupters. By introducing an interrupter size factor, the boundary of the extinction peak of the arc voltage and arc conductance at 200 ns before current zero that distinguishes the success and failure of interruption for both small and large models agreed well. Moreover, the arc parameters determined by Cassie and Mayr arc models were analyzed with consideration to interrupter size factor. In conclusion, the interrupter size factor was validated from the point of arc phenomena and an equivalence of small model to product‐scale interrupter was confirmed. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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高压气体断路器的断路器尺寸对热中断性能和零电流特性的影响

小型断路器可方便地从效率方面研究高压气体断路器的中断性能。但是，尚不清楚小型号灭弧室的中断现象（例如，中断性能，中断标准和几何灵敏度）与产品级灭弧室的等效性。进行了大小型灭弧室的灭弧试验，以灭弧室的尺寸为参数，以阐明修改后的灭弧室尺寸对爆炸压力和灭弧性能的影响。测量电弧电压和电弧电导以获得在热中断阶段的详细电性能。结果表明，小型灭弧室的性能趋势与几何改良的大型灭弧室相同。通过引入一个灭弧室尺寸因子，在零电流之前的200 ns处，电弧电压和电弧电导的消光峰的边界可以很好地区分大小模型的中断成功与否。此外，考虑了灭弧室尺寸因素，分析了由Cassie和Mayr电弧模型确定的电弧参数。总之，从电弧现象的角度验证了灭弧室的尺寸因数，并确认了小型模型与产品规模灭弧室的等效性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。电流零之前200 ns时电弧电压和电弧电导的消光峰的边界可以很好地区分大小模型的中断成功与失败。此外，考虑了灭弧室尺寸因素，分析了由Cassie和Mayr电弧模型确定的电弧参数。总之，从电弧现象的角度验证了灭弧室的尺寸因数，并确认了小型模型与产品规模灭弧室的等效性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。电流零之前200 ns时电弧电压和电弧电导的消光峰的边界可以很好地区分大小模型的中断成功与失败。此外，考虑了灭弧室尺寸因素，分析了由Cassie和Mayr电弧模型确定的电弧参数。总之，从电弧现象的角度验证了灭弧室的尺寸因数，并确认了小型模型与产品规模灭弧室的等效性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。从电弧现象的角度验证了灭弧室的尺寸因数，并确认了小型模型与产品规模灭弧室的等效性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。从电弧现象的角度验证了灭弧室的尺寸因数，并确认了小型模型与产品规模灭弧室的等效性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。