Air has been considered a good alternative to SF6 as arc quenching medium for load break switchgear at medium voltage ratings. In this work, the air flow characteristics and influence from the electric arc have been studied for typical currents and over-pressures. The cooling air velocity is typically in the range 150 - 200 m/s and thus well below supersonic speed. The arc and the surrounding hot air severely affect the air flow pattern by causing clogging in the contact and nozzle region.
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机译：对于中压额定值的负载断路开关设备，空气已被认为是SF6的良好替代品，作为灭弧介质。在这项工作中，针对典型的电流和过压，研究了气流特性和电弧的影响。冷却空气速度通常在150-200 m / s的范围内，因此远低于超声速。电弧和周围的热空气会引起触点和喷嘴区域的堵塞，从而严重影响气流模式。
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