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Power transformers are the main equipment of a mining power network. The power of the mining transformer is determined by the power required by the connected consumers. The correctness of its determination depends on all indicators of the power supply system, namely investments, operating expenses, power and energy losses, consumption of conductive material and other materials. When determining the power demanded by consumers, consideration is given to the evolution over time of their burden and the emergence of n...

The materials from are realizing the electric line conductors are great consumption of electrical energy, and at the selection conductors will must allow flow of immersed energy in material and are comparing by the electrical energy losses from life duration the electrical distribution networks. In this context appears the notion of ?optimal current density in terms of energetic? or easier ?energetic current density?. In first stage result that must to choose a solution which to give in final at the conductor mate...