Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Study on the Physical Characteristics of the Low-voltage Circuit Breaker Based on the Accelerated Degradation Test

가속 열화 시험에 따른 저압용 차단기의 물리적 특성에 관한 연구

  • Sin dong, Kang (Department of Fire & Disaster Prevention Engineering, Daejeon University) ;
  • Jae-Ho, Kim (Department of Fire & Disaster Prevention Engineering, Daejeon University)
  • 강신동 (대전대학교 소방방재학과) ;
  • 김재호 (대전대학교 소방방재학과)
  • Received : 2022.08.24
  • Accepted : 2022.11.04
  • Published : 2022.12.31
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Abstract

This study analyzed the characteristics of insulation resistance and operating time based on an accelerated degradation test of a low-voltage circuit breaker. The experimental sample used a molded case circuit breaker (MCCB) and an earth leakage circuit breaker (ELCB). After measuring the insulation resistance of the circuit breakers, the leakage current was affected by an external rather than an internal structure. Furthermore, the insulation resistance of the circuit breakers with accelerated degradation was measured using a Megger insulation tester. In the accelerated degradation test, aging times of five, ten, 15, and 20 years were applied according to a temperature derived using the Arrhenius equation. Circuit breakers with an equivalent life of ten, 15, and 20 years had increased insulation resistance compared to those with less degradation time. In particular, the circuit breaker with an equivalent life of ten years had the highest insulation resistance. Component analysis of the circuit breaker manufactured through an accelerated degradation test confirmed that the timing of the increase in insulation resistance and the time of additive loss were the same. Finally, after analyzing the operating time of the circuit breakers with degradation, it was confirmed that the MCCB did not change, but the ELCB breaker failed.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT). (NRF-2022R1A2C1004599).

References

  1. "KSC 8321", "KSC 8332", "KSC 4621", "KSC 4613", "IEC 60947-2: Low Voltage Switchgear and Control Gear-part2: Circuit Breakers", "IEC 61008-1: Residual Current Operated Circuit-breakers without Integral Overcurrent Protection for Household and Similar Uses (RCCBs) Part 1: General Rules", "IEC 61009-1: Residual Current Operated Circuit-breakers with Integral Overcurrent Protection for Household and Similar Uses (RCBOs) - Part 1: General Rules"
  2. A. A. Razi-Kazemi, M. Vakilian, K. Niayesh and M. Lehtonen, "Circuit-Breaker Automated Failure Tracking Based on Coil Current Signature", IEEE Transactions on Power Delivery, Vol. 29, No. 1, pp. 283-290, 2014. https://doi.org/10.1109/TPWRD.2013.2276630
  3. R. B. Thangarajan, S. Chetwani, V. Shrinet, M. Oak and S. Jain, "A Comparison of Thermoset and Thermoplastic Arc Chutes in Molded-case Circuit Breakers under Fault Clearing", IEEE Electrical Insulation Magazine, Vol. 31, No. 2, pp. 30-35, https://doi.org/10.1109/MEI.2015.7048135
  4. K. H. Lee, "Experimental Evaluation for the Performance of the old MCCB Installed in Apartment Building Power Distribution Board", Journal of the Korean Institute of IIIuminating and Electrical Installation Engineers, Vol. 30, No. 11, pp. 81-86, 2016. https://doi.org/10.5207/JIEIE.2016.30.11.081
  5. C. M. Kim, M. I. Choi. et al, "A study on the Real Condition and Life Time of the RCD", The Transactions of the Korean Institute of Electrical Engineers, Vol. 59, No. 4, pp. 467-472, 2010.
  6. IEEE Approved Draft Recommended Practice for the Selection, Field Testing, and Life Expectancy of Molded Case Circuit Breakers for Industrial Applications", IEEE, 2017.
  7. M. Krasich, "How to Estimate and Use MTTF/MTBF Would the Real MTBF Please Stand Up?", 2009 Annual Reliability and Maintainability Symposium, Fort Worth, TX, pp. 353-359, 2009.
  8. G. D. Gregory and W. M. Hall, "Predicting Molded-case Circuit Breaker Let-through Characteristics in an Electrical System under Short-circuit Conditions", IEEE Industry Applications Society Annual Meeting, Vol. 2, pp. 1754-1764, 1991.
  9. Y. K. Choi and S. W. Jee, "The Effect of the Magnetic Grids and Arc Runner on the Arc Plasma Column in the Contact System of a Molded Case Circuit Breaker", IEEE Transactions on Plasma Science, Vol. 46, No. 3, pp. 606-610, 2018. https://doi.org/10.1109/TPS.2018.2801389
  10. R. Rodrigues, U. Raheja, P. Cairoli, L. Raciti and A. Antoniazzi, "Accelerated aging Test of Solid-State DC Circuit Breaker based on 2.5 kV Reverse Blocking IGCT", IEEE Energy Conversion Congress and Exposition, pp. 6024-6029, 2020.
  11. IEC 62506:2013 Methods for Product Accelerated Testing IEC.
  12. S. D. Kang and J. H. Kim, "Investigation on the Insulation Resistance Characteristics of Low Voltage Cable", Energies, Vol. 13, No. 14, 3611, 2020.
  13. S. G. Burnay and J. Dawson, "Reverse Temperature Effect during Radiation Ageing of XLPE Cable Insulation. In: Mallinson LG (eds) Ageing Studies and Lifetime Extension of Materials", Springer, Boston, MA, 2020.
  14. M. Celina, K. T. Gillen and R. A. Assink, "Accelerated Aging and Lifetime Prediction: Review of non-Arrhenius Behaviour due to Two Competing Processes", Polym Degrad Stab, Vol. 90, No. 3, pp. 395-404, 2005. https://doi.org/10.1016/j.polymdegradstab.2005.05.004
  15. L. K. H. Van Beek, "Dielectric Behavior of Curing Phenolic-formal Resins", Journal of Applied Polymer Science, Vol. 8, No. 6, pp. 2843-2851, 1964. https://doi.org/10.1002/app.1964.070080629
  16. J. D. Jeong, J. Y. Lee, S. D. Kang and J. H. Kim, "Analyzing the Reliability for Life Evaluation of Cables according to Accelerated Degradation Test", Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, Vol. 34, No. 11, pp. 16-22, 2020.
  17. J. H. Kwon, M. H. Park, K. J. Lim and H. Lee, "Investigation on Electrical Characteristics of HDPE Mixed with EVA Applied for Recycleable Power Cable Insulation", 2012 IEEE International Conference on Condition Monitoring and Diagnosis, pp. 1039-1042, 2012.
  18. E. Linde and U. W. Gedde, "Plasticizer Migration from PVC Cable Insulation-the Challenges of Extrapolation Methods", Polymer Degradatiom and Stability, No. 101, pp. 24-31, 2014.
  19. D. W. Jung and J. H. Kim, "A Study on the Operating Characteristics of Molded Case Circuit Breakers according to Temperature Rise", J. Korean Soc. Saf., Vol. 30, No. 5, pp. 8-13, 2015.  https://doi.org/10.14346/JKOSOS.2015.30.5.8