About this chart
Every element is a pylon design that stands in the Dutch grid. Types are classified by circuit configuration, after the HSN-HNM pylon classification system (2013). A type counts when at least two pylons are, or were, in the field. Grid situation as of 1 January 2016.
Reading an element
- Top number
- Unit mass of the standard S+0 pylon, in metric tons
- Boxed number
- Height of the stable S+0 isotope, in metres
- S−x / S+x
- Isotope range: lowest and highest variant relative to the standard height
- Valency
- Nominal number of circuits; (n) is the number it was designed for
- Year · discoverer
- First report and the utility that built it
- Badge
- Electric potential in kV; two values for hybrids (design / in operation)
- ≈ italic
- Estimate
- Only seen in private connections
Data and photos: HoogspanningsNet (H. Nienhuis, O. Lesley, 2016, rev. 2023), CC BY-NC-ND.