评半导体消雷器的通流能力

COMMENT ON CURRENT CARRYING ABILITY OF SEMICONDUCTOR LIGHTNING ELIMINATOR

本文对半导体消雷器的极限通流容量与雷电流释放的能量进行了比较，计算表明，半导体消雷器的通流容量，即使如文［１］所述的由１０根单针通流容量为２．７３Ｊ／Ω的半导体针并联也只有３０Ｃ小型雷电流释放能量的１／３３。雷击半导体针时，针管必然会发生热闪络，雷电流的绝大部分能量通过闪络通道释放，热闪络后的半导体针管已经损坏。作者还按文［１］所述方法进行了试验，试验结果与按电阻层体积估算的结果非常接近。证实了半导体消雷针的通流能力太小，遭雷击后不可避免地会发生断裂。

The current carrying capacity of Semiconductor Lightning Eliminator is much lower than the energy released from lightning current. When a semiconductor rod is stroke by lightning, heat flashover will be inevitably occurred, and most of the energy from lightning current will release through the flashover path. After the flashover process the semiconductor rod will have been damaged.