Die Schutzvorrichtungen der Starkstromtechnik gegen atmosphärische Entladungen

Abstract

IT is customary in Germany to divide electrical engineering into two parts, the “Starkstrom” and “Schwachstrom”—the “strong” and “weak” current branches. This book is the first issue of a series, edited by Dr. Benischke, each issue to be complete in itself and to deal with some application of the industry. The first issue treats of the means adopted in the “strong currentl” branch, i.e. electric lighting and power, for protection against atmospheric electrical discharges with overhead lines, especially overhead power-transmission lines, this subject is one of great importance, and is also one upon which very little is known with certainty. It is interesting to find that the author, on the first page, gives it as his opinion that it is impossible to protect a line against the effects of being directly, struck by lightning. In such a case a destruction of the in sulation is bound to take place. It is well that electrical engineers should understand this, and be clear in their own minds thatthe so-called lightning arrestors at pre sent on the market afford no protection here. Fortunately, such cases are very rare. Protection is afforded, according to Dr. Benischke, by lightning arrestors against the weaker side discharges which accompany the main lightning flash, also against spark discharges due to the static charges which the overhead conductors assume as the result of dust, snow, &c., and against induced discharges caused by atmospheric electrical disturbances in the neighbourhood.

Die Schutzvorrichtungen der Starkstromtechnik gegen atmosphärische Entladungen.

By Dr. Gustav Benischke. (Brunswick: Friedr. Vieweg und Sohn.)