| Title |
Electrical/Mechanical Diagnosis of Local Deterioration in 600V Shielded Twist Pair Cable in a Nuclear Power Plant |
| Authors |
박명구(Park, Myeongkoo) ; 김광호(Kim, Kwangho) ; 임찬우(Lim, Chanwoo) ; 김태윤(Kim, TaeYoon) ; 김현수(Kim, Hyunsu) ; 채장범(Chai, Jangbom) ; 김병성(Kim, Byungsung) ; 나완수(Nah, Wansoo) |
| DOI |
https://doi.org/10.5370/KIEE.2017.66.1.203 |
| Keywords |
Local deterioration of Power Cable ; Electrical diagnosis ; Degree of S-parameter ; Mechanical diagnosis ; Modulus |
| Abstract |
In this paper, we propose a electrical/mechanical method to effectively diagnose the local deterioration of a 10m long power shielded twist pair cable defined by the American Wire Gauge (AWG) 14 specification using electrical/mechanical methods. The rapid deterioration of the cable proceeded by using the heating furnace, which is based on the Arrhenius equations proceeds from 0 to 35 years with the deteriorated equivalent model. In this paper, we introduce a method to diagnose the characteristics of locally deteriorated cable by using S_{21} phase and frequency change rate measured by vector network analyzer which is the electrical diagnostic method. The measured S_{21} phase and rate of change of frequency show a constant correlation with the number of years of locally deteriorated cable, thus it can be useful for diagnosing deteriorated cables. The change of modulus due to deterioration was measured by a modulus measuring device, which is defined by the ratio of deformation from the force externally applied to the cable, and the rate of modulus change also shows a constant correlation with the number of years of locally deteriorated cable. Finally, By combining the advantages of electrical/mechanical diagnostic methods, we can efficiently diagnose the local deterioration in the power shielded cable. |