| Title |
Protection of MOV Thermal Runaway and Safety Improvement of SPD using Built-in Instantaneous Trip Device |
| Authors |
Ju-Chul Kim ; Joo-Sool Jeon ; Che-Ouk Ki ; Gyung-Ray Choi ; Sang-joong Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2011.25.2.120 |
| Keywords |
Surge Protective Device ; Thermal Runaway ; Metal Oxide Varistor |
| Abstract |
SPDs are increasingly being used against lightning and switching surge according to the applicable revised standard and equipotential grounding system. SPDs are equipped usually with a MOV voltage regulating element. The MOV, however, always is exposed to the danger of thermal runaway resulting from inrushing temporary overvoltage and deterioration. In this paper, the authors made two prototype SPDs built-in Instantaneous trip device and analyzed their limiting voltage through test of the MOV breakdown. As the result of the analysis, the SPDs built-in Instantaneous trip device was proven to be effective for protecting MOV against thermal runaway and Instantaneous trip device react for limiting voltage is considered that is applicable to SPD. |