Abstract :
THE highest-voltage lightning arresters ever built were recently installed by the Hydro-Electric Power Commission of Ontario. Under emergency conditions they will protect line voltages as high as 268,400 volts. This is also the largest arrester installation for voltages over 200,000. One three-phase arrester protects each of four banks of transformers on the 220,000-volt transmission line from Paugan to Leaside.
