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인청동 스위칭 모듈을 이용한 전력계통 및 전자기기 내부회로의 MOV 열폭주 방지와 안전성 개선
김주철(Ju-Chul Kim),최경래(Gyung-Ray Choi),이상중(Sang-Joong Lee) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.9
The MOV(Metal Oxide Varistor), a voltage limiting element, has been installed in the SPD(Surge Protective Device) or inside the internal circuit of an electronic appliance for protection of the electric power system and electronic device against electrical surge. Such an MOV is exposed, however, to the risk of the thermal runaway resulting from excessive voltage and deterioration. In this paper, a reciprocal action has been tested and analyzed using a phosphorus bronze switching module and the low-temperature solder. And a short current break characteristic test linked with the circuit breaker has been performed to limit the inrush current when the MOV breaks down. It has been proven that the phosphorus bronze switching module installed inside the internal circuit can improve the safety of the power line system and the electronic device.
내장 순시 트립장치를 이용한 MOV의 열폭주 보호와 SPD의 안전성 개선
김주철(Ju-Chul Kim),전주술(Joo-Sool Jeon),기채옥(Che-Ouk Ki),최경래(Gyung-Ray Choi),이상중(Sang-Joong Lee) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.2
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.