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3상 저항가열식 전기히터의 화재예방을 위한 결함 진단장치

Fault Diagnosis Device for Fire Prevention of the Resistance Heating Type three-Phase Electric Heater

  • Lee, Mun-Hyung (Dept. of Safety Engineering, Seoul National University of Science and Technology) ;
  • Kim, Chan-O (Dept. of Safety Engineering, Seoul National University of Science and Technology)
  • 투고 : 2017.08.28
  • 심사 : 2017.10.28
  • 발행 : 2017.11.01

초록

In this study, We have discussed the development of a diagnostic device to detect and prevent electrical fire due to the arc caused by contact failure and partial disconnection at the connection part of the three-phase electric heater wiring used in the industrial field. The arc caused by contact failure and partial disconnection at the connection part of the electric heater shows a change in the current effective value. Therefore, it is possible to determine whether there exists a defect by analyzing the current unbalance factor and the number of current fluctuations with the diagnostic apparatus. The three-phase unbalanced heater is considered to be capable of determining defects through periodic measurement and trend analysis of the current unbalance factor. It is also expected that this device can be used not only for electric heaters but also for detection of defects in wiring and connections of electrical equipment having a characteristic of constant load current.

키워드

참고문헌

  1. Korea Electrrical Safety Coporation, "A Statistical Analysis on the Electrical Accident for 2015", pp. 26, 2016.
  2. National Fire Data System, "www.nfds.go.kr", 2017.
  3. Jin Man Choi, Ten Fire Investigation Introduction, Sungandang, pp. 248, 2010.
  4. Woonyoung co, LTD. "Digital Type Thyristor Unit", pp. 5-6, 2015. 3.
  5. Mun Hyung Lee, "Fault Prediction based on Unbalanced Current Detection of Three Phase Heater ans Selecttion of Protective Device", Journal of the Korean Society of Safety, Vol. 30, No. 1, pp. 28-33, February 2015. https://doi.org/10.14346/JKOSOS.2015.30.1.028
  6. Schneider Electric, "Electronic Motor Protection Relays", pp. 20-47, pp. 110, 2006.
  7. Korea Electric Association, "Electrical equipment technical standards and criteria Aticle267(Prevention from voltage imbalance), 2017.
  8. Jong Gyeum Kim, "The Measurement & Analysis of Voltage Unbalance Factor at LV Customer of Three- Phase Four-Wire System", Jounal of the Korea Institute of illuminating and Electrical Installation Engineers Vol. 18, No. 36, pp. 95-96, 2014.11.
  9. KEPCO, "Basic Terms and Conditions Bylaws Article 26 (Facilities such as protection devices for electricity use)", pp. 42, 2017.