[논문]노후화된 누전차단기의 과전류 동작 특성에 관한 연구

박예진; 강신동; 김재호

doi:10.14346/jkosos.2023.38.5.1

노후화된 누전차단기의 과전류 동작 특성에 관한 연구
A Study on the Operating Characteristics of the Aged ELCB according to the Overcurrent 원문보기

한국안전학회지 = Journal of the Korean Society of Safety, v.38 no.5, 2023년, pp.1 - 7

박예진 (대전대학교 소방방재학과) , 강신동 (대전대학교 소방방재학과) , 김재호 (대전대학교 소방방재학과)

Abstract ▼ AI-Helper

This study analyzes the operational characteristics of 311 aged and non-aged residual current circuit breakers (RCCBs) in low-voltage consumer contexts. It investigates the influence of external temperature and harmonics based on the rated current multiples. To simulate temperature variations, a convectional oven was used around the circuit breakers. Additionally, the generation of harmonic reference signals and data measurement for overcurrent experiments were conducted using NI SCXI, myDAQ, and LabVIEW. An observation revealed that as the ambient temperature increased, the operating time of RCCBs decreased in the time delay region. This was attributed to the faster response or bending of the bimetal, which is the tripping element. However, aged RCCBs encountered challenges with tripping outside the protective curve. The operating time of the circuit breakers exhibited an acceleration influenced by the order and content of harmonic currents, potentially leading to malfunctions. Aged RCCBs demonstrated faster operating times than their non-aged counterparts. However, the difference in operating time varied based on the manufacturer's and operating environment of the RCCBs. Frequent malfunctions of RCCBs can result in power outages. In cases where these circuit breakers fail to operate, they can lead to secondary damages, including electrical fires and shocks. Consequently, it is imperative to consider the operating environment of RCCBs and provide appropriate replacement cycles to mitigate these risks.

주제어

표/그림 (14)

그림 Fig. 1. Overcurrent protection structure of thermal Magnetic type circuit breaker.
그림 Fig. 2. Protection curve of circuit breaker.
그림 Fig. 3. Experimental setup according to temperature.
그림 Fig. 4. Trip time of non-aged circuit breaker according to the temperature.
표 Table 1. Parameters of circuit breaker protection curve
그림 Fig. 5. Aged circuit breakers collected from all parts of Korea.
그림 Fig. 6. Failure rate of circuit breakers.
그림 Fig. 7. Trip time of aged circuit breaker according to the temperature. (a) 1990s (b) 2000s (c) 2010s.
그림 Fig. 8. Comparison of trip time by years on the protective curve of a circuit breaker.
그림 Fig. 9. Experimental setup according to harmonics.
그림 Fig. 10. Harmonic waveforms of 3rd, 5th, 7th, and 9th order with a distortion factor of 30%.
그림 Fig. 11. Trip time of the non-aged circuit breaker according to the 3 harmonic.
그림 Fig. 12. Integration value of one cycle of the 3rd order harmonic waveform.
그림 Fig. 13. Comparison of the trip time of aged circuit breaker by years.

참고문헌 (14)

"KS C 4613", "KS C 4621", "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", 2022.
S. M. Park, "A Study on the Composite Electrical Fire？Hazard by Partial Disconnection and Tracking", Master's？Thesis, Graduate School Hoseo University, pp. 11-13,？2015.
W. S. Ko, "A Study on the Evaluation of the Characteristics？of a Resistive Leakage Current System Installed in a？Distribution Panel", Master's Thesis, Graduate School？Jeonju University, pp. 1-59, 2017.
C. C. Thompson and C. I. Barriga, "Relationship Between？Historical Trends, Equipment Age, Maintenance, and？Circuit Breaker Failure Rates," IEEE Transactions on？Industry Applications, Vol. 55, No. 6, pp. 5699-5707, 2019.

상세보기
S. D. Kang and J. H. Kim, "A Study on the Physical？Characteristics of the Low-voltage Circuit Breaker Based？on the Accelerated Degradation Test", J. Korean Soc. Saf.,？Vol. 37, No. 6, pp. 1-8, 2022.
M. G. Choi, B. H. Jeong, J. C. Park, H. G. Kim, H. S. Mok？and G. H. Choe, "Analysis of Active Characteristic the？Low-voltage Circuit Breaker for Harmonics", Proceedings？of the KIEE Conference. The Korean Institute of Electrical？Engineers, pp. 1474-1476, 2005.
J. G. Yoo, S. I. Lee and J. C. Jeon, "Survey on the？Malfunction of MCCB and ELB in Private Electrical？Facilities", Journal of the Korean Institute of Illuminating？and Electrical Installation Engineers, Vol. 19, No. 2, pp.？87-93, 2005.
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.
J. C. Jeon, J. G. Yoo and S. I. Lee, "Operating？Characteristics of Molded Case Circuit Breakers by？Harmonic Currents", Journal of the Korean Institute of？Illuminating and Electrical Installation Engineers, Vol. 20,？No. 2, pp. 68-74, 2006.
K. M. Park, J. H. Kim, J. Y. Park, S. J. Hong and S. B.？Bang, "Analysis of the Operating Characteristics of the？ELB for House by Short Circuit Test", Journal of the？Korean Institute of Electrical Engineers's Autumn？Conference of the Electrical Equipment Division, pp.？111-112, 2019.
K. C. Kim, D. H. Kim, S. C. Kim and J. H. Kim, "Analysis？of Thermal Characteristics and Insulation Resistance？Based on the Installation Year and Accelerated Test by？Electrical Socket Outlets", Safety and Health at work, Vol.？11, Issue 4, pp. 405-417, 2020.

원문보기 상세보기
Korea Electrical Safety Corporation, "The Development of？Low Voltage Circuit Breaker about life Improvement &？The Selection of Optimum Replace Cycle", 2008.
"IEEE Approved Draft Recommended Practice for the？Selection, Field Testing, and Life Expectancy of Molded？Case Circuit Breakers for Industrial Applications",？Institute of Electrical and Electronics Engineers, 2017.
Korea Electric Equipment Technical Standard, https://kec.kea.kr, 2021.

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증