Abstract
THERE are not so many text-books on circuit and machine protection that the present edition of the author's well-known work is not welcome, especially as it has been brought right up to date. The potential power in modern rotating machinery and transmission circuits is so great that one need not wonder at the simplicity and robustness of the design, maintenance, and testing of the apparatus which is relied on to prevent a major disaster on a fault developing and spreading. At the same time that faulty elements in a system are de-energized by the protection system, it is evident that power must be maintained in as much of the rest of the system as possible. The author therefore outlines the development of protection, the design and interconnexion of the necessary voltage and current transformers, and gives a full description of the relays necessary for the sequential or distance control of the circuits to be protected. A chapter on symmetrical components is given so that protection schemes depending on this conception may be the better appreciated. The author concludes his useful survey with an account of the protection of plant, testing, references to relevant literature, and a glossary of the technical terms used in the art. The stability of power supply in Great Britain and the rarity of major breakdowns is the result of the careful application of this protection technique.
Automatic Protection of A.C. Circuits
G. W.
Stubbings
By. Third edition, revised. Pp. viii + 320. (London: Chapman and Hall, Ltd., 1943.) 18s. net.
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HUGHES, L. Automatic Protection of A.C. Circuits. Nature 151, 683 (1943). https://doi.org/10.1038/151683b0
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DOI: https://doi.org/10.1038/151683b0