| Title |
A Study on the Operation Characteristics of Main Circuit Breaker for AC EMU |
| Authors |
김상현(Sang-Hyun Kim) ; 김철수(Chul-Soo Kim) ; 김재문(Jae-Moon Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2019.68.11.1477 |
| Keywords |
EMU(Electric Multiple Unite); MCB(Main Circuit Breaker); Operation Failure |
| Abstract |
This paper presents an analysis of the operating characteristics of MCB in the power system of EMU powered by AC 25kV. The MCB is installed on the roof of the EMU vehicle and it performs on and off operations in poor environments conditions depending on the external environment, such as vibration and temperature changes due to operation. In the Shinbundang-Line driverless EMU vehicle system, as MCB’s operation failures occurred at outdoor temperature range of 1 ~ -11 . It is analyzed the operate ? ℃ ℃ characteristic and the hypothesis theory of operation failure was established. It is verified experimentally and an applicable system is proposed that can operate smoothly under service environment condition. Finally, the results of the verification were applied to the train and the results of the proposed system were verified through long-term and follow-up observation. |