The deion flashover protector and its application to transmission lines

ON POWER transmission lines a flashover due to lightning usually results in a power arc and a line outage. The deion flashover protector, a device intended for the protection of insulation such as used on transmission lines, provides a path for the spark where the resulting power arc can be extinguished without causing a system disturbance. Electrodes within a tube serve as spark and arc terminals. The walls of the tube are made of such material that the arc generates a gas which assists in extinguishing the arc. An external air gap is usually placed between the tube and the line.