Abstract
This paper deals with mathematical modelling of the temperature distribution in the vicinity of a direct electrical high-current contact under the action of a nominal current of 3000 A. High-current electrical contacts belong among the elements by which a large number of electrical devices are connected. They play an important role especially in the transmission and distribution system, where they have to withstand adverse weather conditions that have a significant impact on their degradation.
Highlights
Electrical contacts play a seemingly simple but important role in electrical systems
The given contacts can be loaded with an electric current from 500 A to 4000 A, while in the analysis, we considered the value of 3000 A
The given temperature distribution confirms the higher maximum and minimum temperature value compared to the previous state, while there was an increase of approximately 6°C
Summary
Electrical contacts play a seemingly simple but important role in electrical systems. They provide the interface between the segments of the circuit, allowing the segments to connect and disconnect as needed. This may seem simple at first glance, the design of this type of connection (electrical contact) requires careful planning and consideration of all possible adverse effects. The contacts must be designed to minimize the occurrence of these fault modes, all while maintaining low contact resistance, minimal electrical noise, and reliable connection and disconnection capabilities. Electrical contacts belong among the quite faulty parts of devices and circuits, so special materials are used for their production. There are hundreds of different contact materials that are successfully used in many different applications
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