DocumentCode
795019
Title
Optimum Use of Oil-Filled Distribution Transformers to Design Resistance Ground Sources for Medium-Voltage Delta-Connected Power Sources
Author
Doughty, Richard L. ; Vosicky, John
Author_Institution
Engineering Department, E. I. DuPont deNemours and Company, Louviers 52S15, Wilmington, DE 19808.
Issue
2
fYear
1985
fDate
3/1/1985 12:00:00 AM
Firstpage
469
Lastpage
475
Abstract
A procedure is developed to design a resistance ground source for medium-voltage power systems with delta-connected source transformers. The optimum connection is shown to be three distribution transformers in wye/broken delta configuration with a 600-V resistor in the secondary circuit. The assumptions are that the transformer banks are used solely as a source of ground fault current, that the power system has no loads at line-to-neutral voltage, and that the ratio of source transformer to distribution transformer three-phase kVA is greater than 25.
Keywords
Costs; Fault currents; Grounding; Medium voltage; Oil insulation; Power engineering and energy; Power system faults; Power systems; Power transformer insulation; Resistors;
fLanguage
English
Journal_Title
Industry Applications, IEEE Transactions on
Publisher
ieee
ISSN
0093-9994
Type
jour
DOI
10.1109/TIA.1985.349669
Filename
4158006
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