| Title |
Protection Effects According to the Conditions of Installations of SPDs for Information-Oriented Equipments |
| Authors |
Bok-Hee Lee ; Dong-Moon Lee ; Dong-Cheol Jeong ; Su-Bong Lee ; Seung-Chil Lee |
| Keywords |
Surge protective device(SPD) ; Lightning surges ; Grounding ; Protection against lightning surges |
| Abstract |
Recently, there are increasing social needs for stable supply of electric power and securing high quality of information and communication services. In this work, to propose the effective protection countermeasures of information-oriented equipments against lightning surges, the protection effects of surge protective devices(SPDs) were experimentally investigated using actual-sized test circuits in various installation conditions. As a result, it was found that the protection effect of SPDs is quite different, depending on the factors, such as the grounding system of power source, numbers of branch circuits, wiring method of grounding leads, and etc. In case of installing SPDs for information-oriented equipments, including all electric power lines and communication lines, the common grounding should be the most effective. Wiring method containing grounding leads with power lines in metal conduit is suitable to improve the surge cutoff performance of SPDs. |