A study on the carbonization characteristics of insulating materials between RCD terminals deteriorated by NaCl solutions

To protect equipments from electric leakage current, we generally use Residual Current Device(RCD). In this paper, we studied on the carbonization characteristics of insulating materials between the source terminals of RCD deteriorated by NaCl solutions. The process of ignition was taken by high speed camera. And the carbonization materials were analyzed by Fourier Transform Infrared spectrometer(FT-IR) and Differential Thermal Analyzer(DTA). In comparison with the virgin sample, the spectra of carbonized materials did not have absorption peak near 1609.5 cm^-1. In the results of thermal analysis, the exothermic peaks of carbonized materials showed differences according to the number of droplets and carbonization time.