The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Fault Diagnosis Device for Fire Prevention of the Resistance Heating Type three-Phase Electric Heater

3상 저항가열식 전기히터의 화재예방을 위한 결함 진단장치

  • 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)
  • Received : 2017.08.28
  • Accepted : 2017.10.28
  • Published : 2017.11.01
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Abstract

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.

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References

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