抄録
It is well known that increasing conductor radius of grounding electrode results in decreasing grounding resistance, but the decrease extent is very little compared with the increase extent. However, when bundled conductors are used for grounding electrode, lower grounding resistance is expected to be obtained. Thus the bundled conductors of horizontal electrodes are better buried in full width of dug ditch (say, in 30cm width).
Of bundled conductor counterpoise and mesh electrodes in homogeneous and two-layers grounds, grounding resistances are computed, and compared with those of single conductor electrodes. It is shown that grounding resistances of bundled conductor electrodes are considerably less than those of single conductor. Furthermore, of counterpoise electrodes fed at one side, inductances and then impedances are computed. It is found that grounding impedances of bundled conductor electrodes are also considerably less than those of single conductor electrodes.
