| Autor: |
Havadtöi, Cristina, Dragomir-Stanciu, Daniel, Moldovan, Liviu |
| Předmět: |
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| Zdroj: |
Interdisciplinarity in Engineering; 2022, Vol. 16, p108-121, 14p |
| Abstrakt: |
The objective of this research is to develop the method for calculating the number of wires in the copper conductor of class of flexibility 5, based on the electrical resistance of a single wire. In order to minimize the power and power losses on the cable, the electrical resistance of the multi-wire cable must be kept to a minimum. Each wire was modeled as an electric conductor with a circular section, where the nominal diameter ranges and diameter tolerances are being imposed by the SR EN 13602 standard. This study was conducted in 2019–2021 on electrical cables for the manufacture of power cords produced by international companies, especially those operating in the European market. Through mathematical modeling it is deduced the relationship which shows that the electrical resistance of the cable depends on both the diameter of the wires and the number of wires and it is inversely proportional to the product Nd² (N-minimum number of wires, d-wire diameter) which is a constant for each value of the electrical resistance of the cable. The research highlights the variation of the minimum wire diameter depending on the number of wires. The analysis of numerical data reveals that for values of N less than 26 the cable resistance is higher than the value of the maximum resistance 19.50 imposed by the standard SR EN 60228. It follows that if it is imposed a diameter equal to the maximum diameter provided in the standard, the minimum value of the number of wires is N = 26. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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