Inveraray to Taynuilt towers
Contents
Overview
The line between the Inveraray and Taynuilt substations in Scotland uses a transmission tower type likely to be unique to this line. These are “light construction” towers, designed for 0.125□″ SCA (125 mm² Tiger ACSR) conductors and no earthwire. The towers were Blaw Knox contract T1498. The tower types are suffixed “L”, possibly denoting light construction.
An adapted version of this tower suite was used for Quoich–Broadford, with earthwire support.
Termination details are unclear. At Taynuilt the line appears to split onto a pair of “STL” single-circuit lightweight flat formation terminal gantries; one of these can be seen from the road outside the substation. The termination at Inveraray is unknown, but possibly involves a PL16 DT90. Presently no DTL is known.
General data
| Design contractor | Blaw Knox |
|---|---|
| Found | |
| Status | Historic, in service |
| Class | Light construction |
| Height (straight line tower) | 73′–0″ (22.3 m) |
| Voltage | 132 kV |
| Dates back to | 1959 (drawings) |
| Known conductors | Single |
| Design conductor | 0.125□″ SCA (125 mm² Tiger ACSR) |
| Design earthwire | None |
| Circuit count | Double |
Tower forms
The following diagrams are shown to scale at 12 pixels per metre:
The D60L and D90L tower bodies are visually identical, but the D90L corner bars are an inch wider up to the middle crossarm.
Tower details
Crossarm width is the total width across the widest crossarm pair.
| Tower type | Source | Height | Base width | Crossarm width |
|---|---|---|---|---|
| D2L | 501/1109/0031 | 73′–0″ (22.3 m) | 11′–8.75″ (3.6 m) | 26′–0″ (7.9 m) |
| D10L | XM3506-16 | 65′–3″ (19.9 m) | 13′–9″ (4.2 m) | 23′–0″ (7.0 m) |
| D30L | XM3506-27A | 65′–3″ (19.9 m) | 16′–6″ (5 m) | 24′–6″ (7.5 m) |
| D60L | XM3506-34A | 65′–3″ (19.9 m) | 19′–0″ (5.8 m) | 27′–0″ (8.2 m) |
| D90L | XM3506-36 | 65′–3″ (19.9 m) | 19′–0″ (5.8 m) | 30′–0″ (9.1 m) |
| STL | XM3506-52A | 41′–0″ (12.5 m) | 15′–5″ × 10–0″ (4.7 × 3.0 m) | 31′–0″ (9.4 m) |
| Tower type | Peak to top crossarm | Top to middle crossarm | Middle to bottom crossarm | Bottom crossarm to ground |
|---|---|---|---|---|
| Suspension | 3′–0″ | 11′–0″ | 11′–0″ | 48′–0″ |
| Tension | 3′–0″ | 11′–0″ | 11′–0″ | 40′–3″ |