摘要:

The present stage of rural development is reviewed and the general considerations affecting design of equipment are discussed. It was realized that an examination of the design of a concrete scheme would unduly limit the scope of the paper, and consequently an abstract scheme embodying average conditions found within Great Britain was employed. This was termed a “Model Scheme” and covered 400 square miles.Average conditions, including those of average density of population (150), average load and average revenue, were sought and determined. Such information having been acquired, the general and then the detailed design are discussed, involving the construction of overhead lines and substation equipment best suited to the purpose, having regard to the limits imposed by financial considerations.Estimates of capital expenditure and revenue over a period of years are given for the “Model Scheme”, supplemented by estimates of similarly devised schemes based on densities of 100 and of 75 people per square mile, such densities being representative of the countryside.Based on such statistics and data as are now available, and on a satisfactory tariff, the paper shows that electrification of sparsely populated rural areas is a practical proposition from a technical and financial aspect.

DOI:10.1049/jiee-1.1932.0012

出版商:IEE    

年代:1932

数据来源: IET

DOI:10.1049/jiee-1.1932.0019

出版商:IEE    

年代:1932

数据来源: IET

摘要:

This paper deals only with the practical application of the idea of sounding by reflection as applied to the needs of navigation in the mercantile marine. It does not profess to deal with any original researches on the subject, but is only a statement of the present state of the art, especially with reference to the mercantile marine of this country.In order to keep the paper within reasonable limits all detailed description of apparatus has been omitted. Theoretical discussions on the subject, together with detailed descriptions of apparatus, have appeared from time to time in the technical Press. TheHydrographic Review(1930, vol. 7, No.2) contains references to previous articles on this subject. Most interesting papers can also be found in theBulletin de I' Association Technique Nautique et Aéronautique(No. 34 of 1930) and inElektrische Nachrichten-Technik(1929, vol. 6, p. 165). The principal formulæ referred to have been collected in an Appendix and have all been extracted from papers by Prof. Langevin.

DOI:10.1049/jiee-1.1932.0020

出版商:IEE    

年代:1932

数据来源: IET

摘要:

It is frequently necessary for economic reasons to carry out tests on short cable samples. Measurements of a.c. leakance and power factor on short lengths of power or submarine cables may be subject to considerable error unless due allowance is made for end effects, which are of minor importance on long lengths. The application of the simple guard wire, which is adequate for d.c. testing, is not sufficient to secure accurate results. The nature of the errors which arise is discussed, a theory of the cause of the errors is developed, and recommendations are made as to the form of guard which will enable accurate results to be obtained.

DOI:10.1049/jiee-1.1932.0022

出版商:IEE    

年代:1932

数据来源: IET

DOI:10.1049/jiee-1.1932.0023

出版商:IEE    

年代:1932

数据来源: IET