Abridgment of relation between transmission line insulation and transformer insulation

Principles to be followed in transmission-line construction in order to reduce damage from lightning are recommended in this paper. The major recommendations are as follows: (1) Keep transmission conductors low and arrange horizontally, (2) use ground wires, (3) use sufficient insulation but of a sufficiently low value near stations to protect apparatus, (4) install lightning arresters at the transformers. The arguments leading to these recommendations are outlined in the paper.