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首页> 外文会议>Electrical Insulation and Dielectric Phenomena, 1988. Annual Report., Conference on >Uniform field breakdown in SF/sub 6/ gas at high pressures under lightning and switching surge voltages
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Uniform field breakdown in SF/sub 6/ gas at high pressures under lightning and switching surge voltages

机译：雷电和开关浪涌电压下高压下SF / sub 6 /气体中的均匀电场击穿

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摘要

Experiments were conducted to determine the 50% flashover voltages (V/sub 50/) over the pressure range of 0.14 to 0.45 MPa absolute, using lightning (1.2/50 mu s) and switching (100/2500 mu s) impulse voltages, under uniform electric fields having two electrodes of Rogowski profile, with a gap spacing varying from 4 to 30 mm. Results indicate that the breakdown strength of SF/sub 6/ gas exhibits slight saturation at higher pressures (above 0.3 MPa). The effect is higher for switching surge voltages than for impulse voltages. The polarity effect is observed both under lightning and switching surge voltages and is more pronounced at higher gas pressures and larger gap spacings. The V/sub 50/ values with switching surge voltages are generally lower than the corresponding lightning impulse voltage values.
机译：进行实验以确定在0.14至0.45 MPa绝对压力范围内的50％闪络电压（V / sub 50 /），使用雷电（1.2 / 50μs）和切换（100/2500μs）脉冲电压，在均匀的电场，具有两个Rogowski轮廓的电极，间隙间隔从4到30 mm不等。结果表明，SF / sub 6 /气体的击穿强度在较高压力（高于0.3 MPa）下表现出轻微的饱和。切换浪涌电压的影响要大于脉冲电压的影响。在雷电和开关浪涌电压下均会观察到极性效应，并且在较高的气压和较大的间隙间距下会更加明显。具有开关浪涌电压的V / sub 50 /值通常低于相应的雷电冲击电压值。

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