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배선용차단기 순시 트립장치를 이용한 SPD 열폭주 방지 보호특성에 관한 실험과 분석
김주철(Ju-Chul Kim),전주술(Joo-Sool Jeon),기채옥(Che-Ouk Ki),홍진무(Jin-Moo Hong),이상중(Sang-Joong Lee) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
SPDs(Surge protective devices) are increasingly used for protection against lightning and switching surge according to tightening up of the standard code on equipotential grounding system SPD is equipped with a MOV(Metal oxide varistor), a voltage limiting element, but its temporary overvoltage characteristic is problematic. This paper analyze a combination of MCCB and SPD to protect MOV against thermal runaway, and made its prototype. According to the analysis, an instantaneous trip device is required with SPD in order for MOV to be protected against thermal runaway phenomenon.
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.
MOV 열폭주 방지용 스위칭 모듈의 과전류 차단특성 시험 및 분석
김주철(Ju-Chul Kim),전주술(Joo-Sool Jeon),김태진(Tai-Jin Kim),홍진무(Jin-Moo Hong),이상중(Sang-Joong Lee) 한국조명·전기설비학회 2011 한국조명·전기설비학회 학술대회논문집 Vol.2011 No.5월
The MOV(Metal Oxide Varistor), a voltage limiting element, has been installed inside the SPD(Surge Protective Device) or inside the internal electronic circuit for protection against the electrical surge. It is exposed, however, to the risk of the thermal runaway resulting from excessive voltage and the deterioration. In this paper, the blocking effect of the inrushing current when the MOV breaks down is tested and analyzed using a phosphorus bronze switching module and the low-temperature solder. It has been proven that, as the result, the switching module is effective for blocking the excessive current along the increase of test current.