| Title |
A Study on Separation Distance Calculation Model for Limitation of Earth Potential Rise Nearby Tower Footings |
| Authors |
최종기(Choi, Jong-Kee) ; 조환구(Cho, Hwan-Gu) ; 김태영(Kim, Tai-Young) ; 이동일(Lee, Dong-Il) |
| Keywords |
Footing resistance ; Fall-Of-Potential test ; Fault current division factor |
| Abstract |
In case of a line-to-ground fault at transmission lines, a portion of fault current will flow into the earth through the footings of the faulted tower causing electrical potential rise nearby the faulted tower footings. In this situation, any buried pipelines or structures nearby the faulted tower can be exposed to the electrical stress by earth potential rise. Although many research works has been conducted on this phenomena, there has been no clear answer of the required separation distance between tower footings and neary buried pipeline because of its dependancy on the soil electrical charactersics of the concerned area and the faulted system. In this paper, an analytical formula to calculate the requried sepeartion distance from the faulted tower has been derived. |