• Title/Summary/Keyword: Insulation blackdown

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The Protective Countermeasure of Water Purifier PCB according to Abnormal Voltage (이상전압에 따른 정수기 PCB의 보호대책)

  • Kim, Dong-Ook;Moon, Hyun-Wook;Lee, Ki-Yeon;Kim, Hyang-Kon;Choi, Chung-Seog
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.8
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    • pp.64-70
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    • 2007
  • The electrical accident results from an insulation blackdown by over-voltage, an overheating by the excess of allowable current, a deterioration performance by the passage of time, and so on. This paper discusses how to improve the power control system of PCB in water purifier. The protecting device of present power supply control system in water purifier is composed of the varistor device which acts only for impulse-type surges. So the present system can not be protected others except the surge of impulse-type. The newly-suggested power control system in this paper is designed to protect the system by disconnecting power supply through SSR(Solid State Relay) if the value of input voltage is exceeded the setting value.

A study on the Fire Hazard for the Tracking of RCD through Ground Path at Low Voltage Cabinet Panel (저압분전반에서 접지 경로를 통한 차단기의 트래킹 화재위험성에 관한 연구)

  • Kim, Dong-Ook;Lee, Ki-Yoen;Kim, Dong-Woo;Gil, Hyoung-Jun;Kim, Hyang-Kon;Chung, Young-Sik
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2008.05a
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    • pp.349-352
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    • 2008
  • The electrical accidents result from insulation blackdown due to over voltage and overheating due to the excess of allowable current, deterioration of insulation performance due to the passage of time, and so on. In this paper, the insulating characteristics of phenolic resin using insulating materials for low voltage were analyzed and the tracking test was performed according to IEC Publ. 112.

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