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http://dx.doi.org/10.5762/KAIS.2018.19.7.56

A Study on the Contact Resistance according to the Tightening and Overlapping area of Bus Bar  

Kim, Hyun-Woo (Department of Mechanical Facility Control Engineering, Korea University of Technology and Education)
Son, Yung-Deug (Department of Mechanical Facility Control Engineering, Korea University of Technology and Education)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.7, 2018 , pp. 56-62 More about this Journal
Abstract
The bus bar is an electrical connection widely used for the power supply of skyscrapers and power distribution and industrial equipment electrical panels in industrial plants. There are various materials to be considered in the design of the bus bar, such as material based on the use environment, the sectional area according to the power capacity, the length of the surface circumference, and the tightening method. Even with a bus bar manufactured to a size of sufficient power capacity in the design, if the actual tightening is incorrect, it may lead to fire due to deterioration. For these reasons, a variety of research on the temperature rise of the electrical contact point has continued. However, the temperature rise of the contacts is a consequence of the result, not a direct cause. In this paper, the influence of contact resistance on the fastening force and the overlapping section of the bus bar are investigated by measuring the change in resistance from building the specimen. A total of eight bus bar specimens were manufactured and measured. Resistance was measured by varying the clamping force and the interval between overlapping sections when the specimens were crossed. We propose a safe power connection model by analyzing the contribution of these factors to the actual contact resistance change.
Keywords
a-spot; Bus bar; Contact resistance; Streamline effect; Overlapping; Torque;
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