Blaw Knox T1521

Contents

• Overview
  • General data
• Lines
• Tower forms
  • Examples
• Tower details

Overview

T1521 is a 275 kV UK electricity pylon (steel lattice transmission tower) type designed for the North of Scotland Hydro Electric Board (NoSHEB), the operator of the non-CEB/CEGB portion of Scotland. Only a single drawing has been recovered, the key erection diagram and drawing schedule for the line tower.

T1521 D (1960) appears to be the same tower as T2175 D (1967) and L3 DS (1968) and is contemporary with the equivalent J L Eve enhanced L3 line tower. The corresponding L2 type is T1648.

Compared to L3 D, T1521 D has greater vertical phase clearances and extended middle crossarms.

General data

Contractor	Blaw Knox
Found
Height (straight line tower)	125′–0″ (38.1 m)
Voltage	275 kV
Dates back to	1960 (drawings)
Conductors	Twin
Design conductor	Twin 0.175□″ SCA
Design earthwire	?

Lines

Not yet known.

Tower forms

The following diagram is shown to scale at 12 pixels per metre:

Examples

No lines known.

Tower details

Crossarm width is the total width across the widest crossarm pair, measured between the centres of the conductor attachment points rather than to the end of the steelwork.