1. |
The Wireless Section |
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Journal of the Institution of Electrical Engineers - Part I: General,
Volume 89,
Issue 20,
1942,
Page 327-327
A.N.,
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DOI:10.1049/ji-1.1942.0074
出版商:IEE
年代:1942
数据来源: IET
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2. |
Proceedings of the Installations Section |
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Journal of the Institution of Electrical Engineers - Part I: General,
Volume 89,
Issue 20,
1942,
Page 332-332
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PDF (69KB)
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DOI:10.1049/ji-1.1942.0076
出版商:IEE
年代:1942
数据来源: IET
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3. |
Recommended war emergency relaxations of the Regulations for the Electrical Equipment of Buildings (Eleventh Edition) |
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Journal of the Institution of Electrical Engineers - Part I: General,
Volume 89,
Issue 20,
1942,
Page 333-334
W.K.Brasher,
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PDF (213KB)
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DOI:10.1049/ji-1.1942.0077
出版商:IEE
年代:1942
数据来源: IET
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4. |
The electric spark in air |
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Journal of the Institution of Electrical Engineers - Part I: General,
Volume 89,
Issue 20,
1942,
Page 335-356
J.M.Meek,
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摘要:
The inadequacy of the classical theory of spark discharge when applied to long gaps at atmospheric pressure is discussed. A brief description is then given of the streamer theory of the spark. This latter theory not only explains the observed sparking phenomena but also incorporates a criterion, based on atom-physical considerations, which facilitates the calculation of the breakdown potentials of different gaps in which the field distribution is known. For those gaps in which corona is observed to precede sparkover, the corona onset voltage is that determined. The results of such calculations for various types of gaps are described, with particular reference to the sphere-sphere gap. Various features of point-plane breakdown are also mentioned, and an explanation is given for the occurrence of the upward-growing positive streamer from the earthed plane when the high-voltage point is of negative polarity. It is further shown that in the case of lightning discharge from a negative cloud to earth in open country, upward-growing positive streamers from the earth are not likely to be more than a few metres long and thus will rarely be observed.The subject of irradiation and statistical time-lag is then dealt with in some detail. Various experiments are described and it is shown that quite different results can be obtained according to whether the gap is illuminated or not by the light from neighbouring spark-gaps. The effect of such irradiation is found to be important not only for short gaps but also for gaps several centimetres long, and in particular for the positive impulse breakdown of a sphere-gap when the spacing is greater than that corresponding to the Toepler discontinuity. In this regard certain criticisms are given of the published standard tables for voltage measurement by sphere-gaps.The lowering of sparkover voltage for uniform and nonuniform gaps by the intense light radiated from a nearby spark source was also investigated. An explanation of the various results obtained is given in terms of the new theory of the spark.
DOI:10.1049/ji-1.1942.0078
出版商:IEE
年代:1942
数据来源: IET
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5. |
The manufacture and testing of oils and oil-rosin saturants for use in electrical equipment |
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Journal of the Institution of Electrical Engineers - Part I: General,
Volume 89,
Issue 20,
1942,
Page 363-365
A.W.Thompson,
J.C.Wood-Mallock,
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DOI:10.1049/ji-1.1942.0081
出版商:IEE
年代:1942
数据来源: IET
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6. |
Insulating oil for cables |
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Journal of the Institution of Electrical Engineers - Part I: General,
Volume 89,
Issue 20,
1942,
Page 365-366
S.Beckinsale,
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DOI:10.1049/ji-1.1942.0082
出版商:IEE
年代:1942
数据来源: IET
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7. |
Mineral oils for transformers and switchgear |
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Journal of the Institution of Electrical Engineers - Part I: General,
Volume 89,
Issue 20,
1942,
Page 366-367
A.A.Pollitt,
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DOI:10.1049/ji-1.1942.0083
出版商:IEE
年代:1942
数据来源: IET
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8. |
Electricity applied to single-bucket excavators |
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Journal of the Institution of Electrical Engineers - Part I: General,
Volume 89,
Issue 20,
1942,
Page 367-370
P.H.R.Durand,
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DOI:10.1049/ji-1.1942.0084
出版商:IEE
年代:1942
数据来源: IET
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9. |
The technique of frequency measurement, and its application to telecommunications |
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Journal of the Institution of Electrical Engineers - Part I: General,
Volume 89,
Issue 20,
1942,
Page 370-372
J.E.Thwaites,
F.J.M.Laver,
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PDF (295KB)
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DOI:10.1049/ji-1.1942.0085
出版商:IEE
年代:1942
数据来源: IET
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