Published Resources Details

Journal Article

Author
Dewsnap, G. C.; Williams, E. G.
Title
Investigation of fault detection methods for the impulse testing of transformers
In
Journal of the Institution of Engineers, Australia
Imprint
vol. 29, no. 12, Dec 1957, pp. 311-319
Description

This paper, No.1284, originated in the Sydney Division of The Institution, and is to be presented before a meeting of the Electrical and Communication Engineering Branch of the Division on 26th March, 1958.
An experimental winding stack will be used to demonstrate certain fundamental phenomena at the presentation of this paper. Voltage and current waveforms will be displayed on a projection type cathode ray oscilloscope or on several commercial oscilloscopes.

Mr. G. C. Dewsnap, MEE AMIEAust, is Senior Lecturer in Electrical Engineering, New South Wales University of Technology. Mr. E. G. Williams, AMIEAust, is Assistant Engineer, Testing and Standardising Branch, Sydney County.

See also Discussions and commnications: JIEA v.30 n.10-11 Oct-Nov 1958 pp318-320

[This paper was awarded the Electrical Engineering Prize 1957]

Abstract

This investigation has been carried out primarily for the guidance of testing engineers and others associated with impulse testing procedures and specifications.
The experiments which form the basis of the investigation were made using a locally designed and built recurrent surge generator. Some details of this recurrent surge generator are described after brief mention of the experimental generator used for preliminary experiments.
The interdependence of impulse test connections and successful fault detection methods is stressed before a fault detection and location theory is considered. The theory of fault detection which is presented is qualitative and supported by oscillographic evidence.
Fault detection experiments on distribution transformers show that winding construction affects the maximum sensitivity obtainable. Typical sensitivities are given based on "solid", or metal to metal, faults which are the hardest to detect.
Results of experiments on a 500-kVA and a 13,500-kVA transformer are presented, and a positive method of determining the position of earth faults is described.
The paper concludes with specific recommendations concerning fault detection during the impulse testing of transformers.

See also

Related Published resources

isRelated

  • Dewsnap, G. C.; Williams, E. G. (Edgley, R. K.; Hickling, G. H.; Harrison, H.; Shears, P.; Shaw, W. A.; Tyree, A. W.; Clark, R.; Lamerton, C.), 'Investigation of fault detection methods for the impulse testing of transformers (Discussions and communications)', Journal of the Institution of Engineers, Australia, 30 (10-11) (1958), 318-320. Details

EOAS ID: bib/ASBS18533.htm

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