Resumo

BASTIDAS MORA, Henry; PATINO BERNAL, Marlon  e  ANGEL CASTILLO, Gilma Inés. Technical-parameter calculation model for underground lowpower electrical lines and indoor installations used in telecommunications. Ing. Investig. [online]. 2011, vol.31, n.3, pp.121-129. ISSN 0120-5609.

This article presents an analysis of electrical distribution theory for 60Hz-lines operating at low voltage, particularly underground lines and residential indoor installations. Such distribution lines' behaviour is observed as a function of frequency to consider any advantages regarding the potential use of power transmission lines (PTL) for transmitting telecommunication signals. A method for computing the secondary parameters is proposed which has been based on the primary parameters, namely inductance, capacitance, conductance and resistance. The secondary parameters so obtained were characteristic impedance, propagation constant (together with its real value) and the attenuation constant. Conductor configurations, insulation materials and gauges commonly used in Colombia were verified for such low-voltage lines. A mathematical model is proposed as a theoretical tool for analysing and predicting characteristic impedance pattern and the attenuations which occur at high frequencies, thereby complementing our group's previous work. Conclusions are drawn, together with a perspective regarding future work and applications.

Palavras-chave : PLT; BPL; inductance; capacitance; leakage conductance; resistance; characteristic impedance; propagation constant; attenuation.

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