| Title |
A Study on the Development of a SPD with a built-in Disconnector Using Thermal Sensing Method for improving the applicability |
| Authors |
Soung-Hee Hong ; Min?Ki Hong ; Young-Chul Lee |
| DOI |
http://doi.org/10.5207/JIEIE.2021.35.1.009 |
| Keywords |
Protection effect; Surge Protective Device(SPD); SPD disconnector; Thermal sensing method; Voltage protection level |
| Abstract |
Disconnectors shall be installed in the Surge Protective Device(SPD) to respond to failure of the SPD. The disconnectors can be installed inside or outside of the SPDs, most of which are installed externally. In this paper, we conducted an experiment to compare the cases in which the disconnector was installed inside and outside of the SPD. The results of the experiment confirmed that the value of the voltage protection level() decreases when installed internally. Installing the SPDs built-in disconnector in electrical circuits can further enhance the protection effect of electrical and electronic equipment from surge caused by lightning, etc. In addition, in order to prevent faults such as thermal runaway of MOV, which is a device of voltage-limited SPD, a comparison experiment was conducted with a conventional method using low-temperature lead and a method using heat-sensor element, and it was confirmed that the effect was equivalent to preventing overheating of MOV. As a result, the SPD developed in this paper reduced the manufacturing cost of SPD by using cheaper elements for heat detection methods, and has higher reliability by obtaining KS certification. |