The Cable accidents caused by improper installation, physical, electrical, and environmental factors. Cables faults leads to various failure such as fire, black out and accidental electrocution. Therefore, the cable incident prevent accidents by detecting whether at least initially, and it is important to reduce the damage.
This poor contact fault location of low-voltage power cable was performed by using reflectometry for research. This paper describes a cable accidents and importance, and Chapter 2, inform the principles and characteristics of a typical reflectometry, Chapter 3, we describe the applied removal reference signal technique for the detection performance of sequence and reflected signal used in the reflectometry. And Chapter 4 describes the experimental conditions and the environment, the cable fault detection test was performed. Compare the result was confirmed by the measurement using the cable fault detection.
In this paper, we had detected the fault location represents a certain error rate, regardless of the length from the point of disconnection after a certain point of failure in the cable fault is poor contact failure and open fault detection using the results of reflectometry.
In fault location detection experiments of poor contact was material points lower error rate is far higher. In addition to detecting the fault location if the sequence of a 18[m] cable and the signal applied to the detection of a malfunction during a short distance of 60[m] using a short cable TDR, it was favorably than STDR, SSTDR.
Reason for the high error rate of STDR and SSTDR showed that this overlap phenomenon of the short fault location detection signal and reflected signal is on, because the signal is wider than the autocorrelation sequences using a good performance when applied to the TDR signal is applied. Due to this it is difficult to detect the reflected signal from the fault location. But 120[m] cable over distances failure opposed to the length of the sequence upon detecting. Fault detection using the STDR and SSTDR was favorably than TDR.
Therfore, when measured by using the proposed algorithm with respect to the distance of the cable is determined that the reflectometry to a more accurate fault detection is possible.