Cable voltage drop (three-phase) over a given run length using resistance per km and load current - the basic sizing check per IEC 60092-352.
Formula
$$ \Delta U = \sqrt 3 \cdot I \cdot L \cdot R \cdot \cos\varphi $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $I$ | Load current | A | load list |
| $L$ | Cable length | m | cable schedule |
| $R$ | Resistance | mΩ/m | IEC 60228 Table 1 |
Sources
- IEC 60092-352.