AN ELECTRIC POWER TRANSMISSION LINE WITH PROTECTION DEVICES AGAINST LIGHTNING OVERVOLTAGES

摘要

The invention relates to an electric power transmission line with protection devices against lightning overvoltages in the form of a (lightning) arrester with a surface discharge. At the expense of a rather long discharge path, the impulse lightning flashover does not lap over a power arc of operational frequency, and after passing of the lightning overvoltage impulse current the said line will continue a trouble-free operation without being disconnected. Simple and reliable arrester designs are proposed, and some of them could be put into operation sequentially with protected insulation, and potentate the effect of it, including operation in a working mode. Among the proposed designs are fittings with dielectric cover and insulators, integrating their direct functions (i.e. those of fittings and insulators) with the lightning arresters' ones.