| Title |
Energy Coordination between Cascaded Voltage Limiting Type SPDs in Surge Currents due to Direct Lightning Flashes |
| Authors |
Bok-Hee Lee ; Sang-Hyun Um |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2014.28.5.068 |
| Keywords |
Surge Protective Device ; Energy Coordination ; Voltage-Limiting SPD ; Cascaded Application ; Voltage Protection Level ; Coordinated SPD System ; Surge Current ; Lightning Flash |
| Abstract |
Cascaded applications of surge protective devices(SPDs) are required in order to reduce the stress on the electrical and electronics equipment being protected, and the energy coordination between the cascaded SPDs is very important. This paper deals with the experimental results obtained from the installation conditions of full-scale SPDs. The energy coordination between the upstream Class I SPD and the downstream Class II SPD was measured using a 10/350μs impulse current due to direct lightning flashes. The distances between the cascaded SPDs were 3, 10, and 50m, and the maximum test current was 12.5kA. As a result, the energy sharing between cascaded SPDs was dependent on the voltage protection level of each SPD and the distance between two SPDs. An overview of how to select SPD ratings in applications of cascaded SPDs system was discussed based on the energy coordination between the two SPDs. The proposed test results for the energy coordination between two-stage cascaded SPDs can be used in effective applications of SPDs. |