电弧烧伤。由于电极(含接地极)与管子表面之间起弧而产生的局部表面熔化点。

Arc Burns. Localized points of surface melting caused by arcing between electrodes or ground and pipe surface.

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介绍了三相五柱式消弧线圈的工作原理，单相电弧接地过电压的工频熄弧理论。

The principle of arc-suppression coil with three phases and five columns , and theory of power frequency extinguishing arcing were introduced.

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