| Title |
A Study on the Real Condition and Life Time of the RCD |
| Authors |
김종민(Kim, Chong-Min) ; 최명일(Choi, Myeong-Il) ; 김영석(Kim, Young-Seok) ; 방선배(Bang, Sun-Bae) ; 송길목(Shong, Kil-Mok) ; 서정열(Seo, Jung-Youl) |
| Keywords |
RCD ; Life Time ; Weibull Distribution ; MTTF ; Minitab |
| Abstract |
In this study, an analysis of the used RCD's condition is conducted to assess the effect on environment of installation area, terms of use, corrosion, contamination etc. According to KS C 4613, the used RCDs were tested to get date which is the RCD's life time. And then, the date is analysed using Minitab which is a statistical program for reliability analysis. As a result, The RCD's MTTF for the all samples is 12.7{\pm}0.23 years. and the MTTF of RCDs which are used indoor area is 12.9{\pm}0.34 years, the MTTF of RCDs which are used outdoor area is 11.9{\pm}0.30 years. Futhermore, the MTTF of RCDs which are used in dry area is a 13.1{\pm}0.26 years, the MTTF of RCDs which are used in dust area is 13.0{\pm}0.57 years, the MTTF of RCDs which are used in moisture area is 8.4{\pm}0.77 years. |