A study of impulse voltage breakdown with reference to the initiation of follow current

Alston, Livius Leonard (1955) A study of impulse voltage breakdown with reference to the initiation of follow current. PhD thesis, University of Glasgow.

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The mechanism of follow current has been studied using a synthetic power source In conjunction with a Marx Impulse generator circuit, and air gaps of up to 1.6 cm. The performance of the circuit has been established analytically and experimentally, and the suitability of synthetic power circuits for follow current studies has been confirmed by the results of this investigation. A resistance divider with Inherent voltage limiting characteristics was essential for recording the discharge voltage between the electrodes. A method was devised and was shown, both by analysis end experiment, to have the required characteristics. The experimental technique having been established, a study has been carried out of the effects of variation in power and impulse circuit parameters, and in electrode material, shape, spacing, and surface condition. Three types of follow current have been defined, and their mechanisms have been explained. A close relation has been shown to exist in many cases between the conditions under which the establishment of follow current is just possible, and those required for arc-glow and glow-arc transitions in the test gap. Criteria which determine the establishment of follow current have been derived; A large number of variables has been shown to be involved in this problem, and their relative importance has been discussed. Recommendations have been made for further studies, as well as for the control of variables in industrial tests.

Item Type: Thesis (PhD)
Qualification Level: Doctoral
Keywords: Electromagnetics
Date of Award: 1955
Depositing User: Enlighten Team
Unique ID: glathesis:1955-73499
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 14 Jun 2019 08:56
Last Modified: 14 Jun 2019 08:56
URI: http://theses.gla.ac.uk/id/eprint/73499

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