U₁=230 V
Z₁= 2500 zw
Z₂=500 zw
[tex]\vartheta=\frac{U_1}{U_2}=\frac{z_1}{z_2} \ \ \rightarrow U_2=\frac{U_1z_2}{z_1}=\frac{230*500}{2500}=46 \ V[/tex]