| Title |
A Study on the Characteristics of Organic Insulating Materials Carbonized by a Leakage Current |
| Authors |
Sang-Taek Park ; Young-Su Roh |
| Keywords |
Organic Insulating Material ; Electrical Fire ; Leakage Current ; Carbonization Characteristics |
| Abstract |
Organic insulating materials which are utilized as insulating materials for the low voltage show unique carbonization characteristics when they are carbonized by a leakage current. Therefore the use of the carbonization characteristics makes it possible to examine the electrical fire which is caused by a leakage current flowing on the surface of the organic insulating material. In order to understand such carbonization characteristics, in this paper, experiments have been done to carbonize typical organic insulating materials such as phenol resin, PVC, and acrylic resin, and the carbonization patterns and the IR absorption spectrum of specimens have been analyzed. According to the analysis of the carbonization patterns, the phenol resin shows the so-called ‘spider-leg’ carbonization pattern due to a thermosetting property, In contrast to the phenol resin, the thermoplastic property makes it difficult to observe a clear carbonization pattern to verify carbonizing causes on the surfaces of PVC and acrylic resins. In this case, the IR absorption spectrum can be analyzed to examine the specimen carbonized by a leakage current. The analysis result shows that absorption peaks appear at the wave numbers of 3,400[㎝-1] and 1,618[㎝-1], which can be an important factor to verify the carbonizing causes. |