| Title |
Protection Coordination Associated with Connection Location of Residual Current Devices and Surge Protective Devices |
| Authors |
Bok-Hee Lee ; Hee-Yeoul Park ; Gun-Jin Shin ; Gwan-Young Bae ; Chun-Hyoung Ryu ; Kang-Hee Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2013.27.3.100 |
| Keywords |
Residual Current Device(RCD) ; Surge Protective Device(SPD) ; Protection Coordination ; Combination Wave Generator ; Protection Voltage Level |
| Abstract |
In this paper, in order to analyze lightning impulse response characteristics in combined installations of SPDs and RCDs, surge protection coordination between SPDs and RCDs are experimentally investigated by using the combination wave generator. Six different types of single-phase residual current operated circuit-breakers with integral overcurrent protection for household and similar uses(RCBOs) being present on the domestic market are tested according to KS C IEC 61009-1 standard. As a result, when a class I SPD is located on the source side of an RCBO, all kinds of specimens are able to provide the proper coordination between the SPD and RCBOs without nuisance tripping, unintended operation or damage due to test impulse currents. However, in the case that the class II SPD is located on the load side of RCBOs, a lot of L-N mode injected currents is split into the RCBO, and a few RCBOs are damaged. Coordination between SPDs and RCDs is not valid and a role of SPDs is of no use. When combining SPDs with RCDs, it is necessary to select SPDs and RCDs in consideration of the protection voltage level of metal oxide varistor embedded in RCDs. |