IEE-IERE Proceedings India
Volume 11, Issue 5, September October 1973
Volumes & issues:
Volume 11, Issue 5
September October 1973
Task Force on Telecommunication and Electronics Industry
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, page: 193 –193
- DOI: 10.1049/iipi.1973.0058
- Type: Article
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Thermistors–development, manufacture and applications
- Author(s): K.C. Bhatt
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, p. 194 –203
- DOI: 10.1049/iipi.1973.0059
- Type: Article
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In this paper, an attempt has been made by the author to trace the general progress of Thermistors and their development, manufacture and applications in various fields during the past two to three decades with particular emphasis on their development and manufacture in India.
Laboratory simulation of local discharges due to pollution on an insulator surface
- Author(s): M.R. Nandagopal and H.V. Gopalakrishna
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, p. 204 –205
- DOI: 10.1049/iipi.1973.0060
- Type: Article
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204
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Due to contamination of the insulator surface, voltage distribution becomes non-uniform. Discharges occur at the joints causing deterioration in the mechanical strength. Laboratory simulation of such a discharge occurring at the joints of a polycone insulator was made and the efficacy of the various coatings of paints and resins was evaluated.
Transient potency factor of protective current transformer–a new standard for transient behaviour
- Author(s): S.V.N. Sarma
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, p. 206 –212
- DOI: 10.1049/iipi.1973.0061
- Type: Article
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The correct performance of protective current transformer during transient is very important to ensure dependable service of the protective equipment. The existing method of measuring the accuracy of a current transformer for accuracy limit primary current; which is a multiple of normal load current ; does not take into account the time constant of aperiodic component of primary fault current. The increase in speed of operation of high speed relays and switch gear now calls for a very short time for the fault detection by the relay apparatus. Times of the order of 20 to 40 ms are not uncommon. In such a short time, the transient currents and fluxes in a current transformer do not reach steady state values and as such application of steady state standard in such case do not give accurate results and may frequently cause maloperations of the connected relay equipment. As far as the author is aware, no standard for transient performance of current transformers have been adopted. This paper presents a new standard for indicating the transient potentialities of a current transformer.
Theoretical analysis of a centre-fed dipole antenna with feed points displaced arbitrarilyand immersed in a weakly ionised plasma
- Author(s): B.S. Rao and Devendra Verma
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, p. 213 –225
- DOI: 10.1049/iipi.1973.0062
- Type: Article
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The presence of plasma has a profound effect on the properties of antenna. Furthermore, the feed point spacing (centre gap) should be small and if this spacing increases in any direction considerably then the properties of the antenna will also vary. In this paper the effect on the properties of a centre-fed fullwave antenna on the radiation is discussed in detail.
Technical news
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, p. 226 –227
- DOI: 10.1049/iipi.1973.0063
- Type: Article
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Forthcoming conferences
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, p. 227 –228
- DOI: 10.1049/iipi.1973.0064
- Type: Article
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Notice to members
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, page: 228 –228
- DOI: 10.1049/iipi.1973.0065
- Type: Article
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228
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Institutions' activities
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, page: 229 –229
- DOI: 10.1049/iipi.1973.0066
- Type: Article
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229
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Industrial news
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, page: 229 –229
- DOI: 10.1049/iipi.1973.0067
- Type: Article
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229
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New product
- Source: IEE-IERE Proceedings India, Volume 11, Issue 5, page: 230 –230
- DOI: 10.1049/iipi.1973.0068
- Type: Article
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