Influence of sand granulometry on electrical characteristics, temperature and electron density during high-voltage fuse arc extinction
Influence of sand granulometry on electrical characteristics, temperature and electron density during high-voltage fuse arc extinction
复制标题
砂粒粒度对高压熔断器灭弧时电气特性、温度和电子密度的影响
DOI：
10.1088/0022-3727/34/6/314
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
W. Bussière
中科院分区：
文献类型：
--
作者：
W. Bussière
用发射光谱和电特性记录研究了灭弧材料的粒度组成对灭弧性能的影响。研究了六个相邻的粒度区间：每个区间宽50 μm，全局区间的上限小于1000 μm。最后发现的规模的闪电岩的粒度成正比。关于电参数，被认为是两组：消光时间常数，耗散能量和I2 t值随粒度减小，而最大值的电弧电压随粒度增加。温度的下降速率取决于观察到的时间间隔：在电弧放电期开始时，最小粒度参数的下降速度最快;在电弧放电期的最后一部分，趋势相反。在电弧放电周期开始时，电子数密度增加在1019和1020 cm-3 ms-1之间变化。当电流减小时，电子数密度呈指数下降，时间常数值在0.40 ms至0.25 ms的范围内。
Emission spectroscopy and the recording of electrical characteristics are used to study the influence of the granulometric composition of arc-quenching material. Six adjacent intervals of grain size are studied: each of them is 50 µm wide, and the upper limit of the global interval is lower than 1000 µm. The final dimensions of the fulgurite are found to be proportional to the granulometry. Concerning the electrical parameters, two groups are considered: the extinction time constant, the dissipated energy and the I2t value decrease with the granulometry, whereas the maximum value of the arc voltage increases with the granulometry. The rate of decrease of the temperature depends on the time interval observed: at the beginning of the arcing period, the decrease is fastest for the smallest granulometric parameters; and during the last part of the arcing period the trend is reversed. At the beginning of the arcing period, the electron number density increase varies between 1019 and 1020 cm-3 ms-1. When the electric current decreases, the electron number density decreases exponentially with a time constant value ranging from 0.40 ms to 0.25 ms.