Esercizio 8

DiAlfredo Di Fiore

V_1=15{,}0\ \text{kV},\quad V_2=220\ \text{V},\quad P=S_1=S_2=P_1=P_2=78{,}0\ \text{kW}.

Correnti
i_1=\frac{P}{V_1}=\frac{78,000}{15,000}=5{,}2\ \text{A},\qquad i_2=\frac{P}{V_2}=\frac{78,000}{220}=3{,}545\cdot 10^{2}\ \text{A}\approx 355\ \text{A}.

Resistenze equivalenti dei carichi (ipotesi puramente resistivi)
R_1=\frac{V_1}{i_1}=\frac{15,000}{5{,}2}=2{,}8846\cdot 10^{3}\ \Omega\approx 2885\ \Omega,
R_2=\frac{V_2}{i_2}=\frac{220}{354{,}545\dots}=6{,}197\cdot 10^{-1}\ \Omega\approx 0{,}620\ \Omega.

Risultati
i_1=5{,}2\ \text{A},\qquad i_2\approx 355\ \text{A},\qquad R_1\approx 2885\ \Omega,\qquad R_2\approx 0{,}620\ \Omega.

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