In this paper, the influence of gas filling pressure on the current interruption performance of different switch configurations with electric arcs burning in nitrogen has been experimentally investigated. A synthetic circuit generating a current of 130 A at 190 Hz is used and the initial rate of rise of recovery voltage just after current zero is varied from 9.8 V/µs to 84.9 V/µs. To evaluate the effect of forced gas flow on current interruption performance, three different test arrangements are investigated: a simple contact configuration with a free-burning arc, a contact and a cylindrical nozzle setup (tube-constricted arc), and finally a self-blast arrangement where the arc is cooled by a gas flow near current zero. In each arrangement, three different filling pressures are mainly studied: 1, 20, and 40 bar, the latter being in the supercritical region. In all cases, the interelectrode gap is fixed at 50 mm. It is observed that the interruption performance deteriorates with ...

中文翻译：

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超高压氮电弧的断流性能

本文通过实验研究了充气压力对不同开关结构在氮气中燃烧电弧时电流中断性能的影响。使用一个在190 Hz时产生130 A电流的合成电路，并且在电流零之后刚好恢复电压的初始上升速率从9.8 V / µs变为84.9 V / µs。为了评估强制气流对电流中断性能的影响，研究了三种不同的测试装置：带有自由燃烧电弧，触点和圆柱形喷嘴设置（管收缩电弧）的简单触点配置，最后是一种自动爆炸布置，其中电弧通过接近零电流的气流冷却。在每种布置中，主要研究三种不同的填充压力：1、20和40 bar，后者在超临界区域。在所有情况下，电极间间隙均固定为50 mm。观察到，随着...的下降，中断性能变差。