电缆金属护层接地方式 |
添加时间:2022/6/16 14:49:47 浏览次数: |
When lightning current or over-voltage wave moves along the cable core, high impulse voltage will appear on the ungrounded end of cable metal sheath or shielding layer; induced voltage will appear on the metal sheath or shielding layer of cable during normal operation of cable line or power frequency short circuit. In order to limit these overvoltages, the metal sheath of cable usually adopts the grounding methods of sheath or shielding layer, such as single terminal grounding, cross interconnection, two terminal grounding and neutral point groundin |
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