Browse > Article
http://dx.doi.org/10.7731/KIFSE.2018.32.2.048

A Study on the Over-current Characteristics of IV Insulated Wire Sheath According to Accelerated Degradation  

Kim, Si-Kuk (Dept. of Fire and Disaster Protection Engineering, Hoseo Univ.)
Choi, Su-Gil (Dept. of Fire and Disaster Protection Engineering, Hoseo Univ.)
Publication Information
Fire Science and Engineering / v.32, no.2, 2018 , pp. 48-56 More about this Journal
Abstract
This paper reports the results of a study on the over-current characteristics of IV insulated wire sheath according to accelerated degradation. In order to examine the degradation of a IV insulated wire sheath through insulation, acceleration degradation experiments were performed using the Arrhenius equation of acceleration life test models; test samples with equivalent lives of 0, 10, 20, 30 and 40 years were prepared. Then allowed currents with over-current of 100%~500% were introduced to measure the times of first generation of smokes and carbonization in the wire sheath, and it was found that the times of first generation of smokes and carbonization in the wire sheath decreased as the equivalent life increased. In more detail, when 270% over-current is applied, the electrical fire risk of equivalent life of 40 years increased by approximately 3.2 times based on equivalent life of 0 years. Also, when the over-current was 255% and 260%, carbonization occurred only in the equivalent life of 40 years, and the fire risk according to the accelerated degradation was increased dramatically. In addition, FT-IR and SEM analyzes were used to confirm the characteristics and surface changes of IV insulated wire sheath according to the equivalent life.
Keywords
IV insulated wire; Accelerated degradation; Over-current; Electrical fire; Fire risk;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 KS C IEC 60364-5-52, "Electrical Installations of Buildings -Part 5-52 : Selection and Erection of Electrical Equipment -Wiring systems" (2012).
2 J. S. You, "A Fire Risk Assessment of Plastics by Using the Cone Calorimeter and Smoke Density Chamber", Master's Thesis, Kangwon National University, p. 8 (2016).
3 D. H. Lee, "Thermal Stabilization of PVC", Master's Thesis, Inha University, pp. 1-48 (1989).
4 Ministry of Land Infrastructure and Transport, "2016 Building Statistics Yearbook", pp. 140-141 (2016).
5 S. K. Kim, S. G. Choi and C. H. Lee, "A Study on the Tracking Characteristics of Phenolic Resin Insulation Material Due to Accelerated Degradation", Fire Science and Engineering, Vol. 31, No. 1, pp. 42-49 (2017).   DOI
6 K. T. Song and S. I. Lee, "Partial Discharge Diagnosis of Thermal Degradated PVC Cable", Journal of the Korean Institute of Electrical and Electronic Material Engineers, Vol. 24, No. 3, pp. 208-214 (2011).   DOI
7 FRONTIS Corporation, "Design and case for accelerated test of electronic items for vehicles" (2012).
8 C. S. Choi, "The Properties Analysis of 600V Grade Polyvinyl Chloride Insulated Wire with Variation of Thermal Stress", T. Korean Institute of Fire Science & Engineering, Vol. 15, No. 1, pp. 108-115 (2001).
9 C. S. Choi and H. K. Kim, "Variation of Carbonization Pattern and Crystal Structure of Polyvinyl Chloride Wire Under the Thermal Stresses", The Transactions of the Korean Institute of Electrical Engineers, Vol. 57, No. 3, pp. 332-337 (2008).
10 National Fire Agency 119, "National Fire Information Center E-Fire Statistics" (2013-2017).
11 H. J. Park, K. H. Kim and H. Kim, "Evaluation of Thermal Aging on PVC Using Thermo Gravimetry Analysis and Accelerated Thermal Aging Test", T. Korean Institute of Fire Science & Engineering, Vol. 18, No. 3, pp. 45-50 (2004).
12 J. H. Lee, "A Study on Deteriorated Diagnoses of Accelerated Thermal Aging CSPE for NPPs", Doctoral Thesis, Wonkwang University, pp. 1-38 (2013).
13 J. S. Yun, "Aging Characteristics and Lifetime Analysis for Low-Voltage VCT Cables", Master's Thesis, Daejin University, pp. 1-45 (2016).
14 S. J. Kim, H. S. Kwon and D. S. Hong, "The Life Assessment Using Accelerated Thermal Degradation of 15 kV Cable", Proceedings of 2013 Summer Annual Conference, The Korean Institute of Electrical Engineering, pp. 10-12 (2013).
15 KECS 1501, "Wiring System-Wire Cable", Korea Electrical and Technical Standard Committee, (2009).
16 KS M ISO 2578, "Plastics-Determination of Time- Temperature Limits after Prolonged Exposure to Heat" (2007).
17 S. G. Choi and S. K. Kim, "Study on the Tracking Characteristics Depending on Accelerated Degradation of PVC Insulation Material", Fire Science and Engineering, Vol. 31, No. 6, pp. 91-98 (2017).   DOI