| 摘要 |
PURPOSE: A concrete electric pole is provided to obtain less ground resistor, to improve the reliability of power supply, and to prevent the falling of a thunderbolt and safety accidents. CONSTITUTION: A concrete electric pole comprises a cylindric earth electrode(20). The cylindric earth electrode(20) consists of a cylindric ground ring(21), three unit ground electrodes, and a ground electrode support(25). Each of the unit ground electrodes consists of needle ground electrodes(23) attached at a lower part of the ground ring(21). The ground electrode support(25) connects the unit ground electrodes.
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