B. Riar, J. Ewanchuk, Hailing Wu, Yue Zhang, Xiao Li, Dihao Ma, Rob Borjas, Jin Wang
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Thermal Design and Experimental Evaluation of a 1kV, 500A T-Type Modular DC Circuit Breaker
This paper presents thermal design of a 1kV, 500A T-type modular DC circuit breaker. Along with the thermal design, which determines the trip/protection curve of the breaker, experimental results of the breaker are also presented in this paper. The breaker is over 99.5% efficient that is evaluated using both thermal measurements and millivolt meter for improving the accuracy of measurements. In addition, experimental results shows that T-breaker can break a fault current of up to 4.24 kA, which is approximately equal to 8.5 times its rated current.
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