# Impedance

<table><thead><tr><th width="179">Parameter</th><th width="279">Description</th><th>Type</th><th>Value range</th></tr></thead><tbody><tr><td>name</td><td></td><td>string</td><td></td></tr><tr><td>r_pu</td><td>resistance of the impedance [p.u.]</td><td>float</td><td>>0</td></tr><tr><td>x_pu</td><td>reactance of the impedance [p.u.]</td><td>float</td><td>>0</td></tr><tr><td>sn_mva</td><td>reference apparent power for the impedance per unit values [MVA]</td><td>float</td><td>>0</td></tr></tbody></table>

\*necessary for executing a power flow calculation

The  exact model and result parameters (for pandapower)  are defined in the link below:&#x20;

<https://pandapower.readthedocs.io/en/latest/elements/impedance.html>
