Sag & Tension Tool
A browser-based calculator for conductor sag and tension across predefined load cases—with exportable results and transparent assumptions.
Intended for Swedish overhead power line (kraftledning) engineering. Based on the Swedish NNA to EN 50341
Client-side computation
Calculations run locally in your browser for fast iteration and offline use after load.
Standard-aligned load cases
Preset load cases are labeled using names defined in SS-EN 50341-2-18, with a user-defined case for special inputs.
Shareable results
Download results as CSV or PDF for review, reporting, and easy sharing. Custom line catalogs use the .lin format.
Tip: Start with the calculator and confirm your span inputs. If you need additional conductor types, add them as custom lines so the built-in dataset remains unchanged.