Pontypridd single-circuit
Contents
Overview
Until recently there was a short line of single-circuit 33 kV towers starting from Upper Boat substation. The start of the line is double circuit on L4(m) towers, splitting into two single circuit lines, one on steel towers and one on wood poles. The short section of steel tower line ran as far as Berthlwyd solar farm, with the line continuing on wood poles.
At some time between 2022 and 2026, the steel tower section appears to have been demolished, with the line taken underground.
The towers were almost certainly designed by J L Eve given that they appeared to be a smaller version of J L Eve C15 0.1□″ SCA. Despite the resemblance, judging by the relative size of three-unit insulator strings, they seem to have been built to smaller clearances and for 33 kV only. Each tower had four crossarms (two pairs) in a symmetrical arrangement; three of which were used for phase conductors, and one of the top crossarms was unpopulated. No earthwire was present. Despite the appearance suggesting that the towers were C15 with one crossarm pair removed, indications are that they were a fully custom type built down to 33 kV clearances.
General data
| Design contractor | J L Eve |
|---|---|
| Found | |
| Status | Likely extinct |
| Height (straight line tower) | ? |
| Voltage | 33 kV |
| Dates back to | ? |
| Known conductors | Single |
| Design conductor | ? |
| Circuit count | Single |
Tower forms
National Grid Electricity Distribution appear to have no material or knowledge of this type; the material may have been lost by Western Power Distribution during their tenure as DNO, or lost even prior to that.
Preliminary diagrams are not possible as the size cannot not be determined from Street View alone.
Tower details
No details.