Abstract
DURING the last ten years, owing to the increase in the size of electrical power generating stations and of the machines they employ, together with the greatly increased voltages used for distribution, very difficult problems in switchgear technique and design havo come to the front, which make it necessary to make a practical test of modern circuit-breakers of an unprecedented size. During an accidental short circuit, enormous currents may be generated, and if the circuit be not broken by suitable switchgear, great damage may be done to very expensive cables and generators. After intensivo research, switchgear manufacturers realized that they must provide themselves with testing facilities on a very much larger scale than was hitherto in existence, in order that the apparatus manufactured should meet the new conditions satisfactorily, performing its functions, to the specified ratings, to the satisfaction both of user and manufacturer alike. The design of circuit-breakers has now become a specialized science.
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Association of Short-Circuit Testing Authorities. Nature 144, 125–126 (1939). https://doi.org/10.1038/144125a0
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DOI: https://doi.org/10.1038/144125a0