Selecting overcurrent protection for three-phase transformers

Author

Bishop, M.T. ; Mendis, S.R. ; Witte, J.F. ; Leix, K.L.

Author_Institution

Cooper Power Syst., Franksville, WI, USA

Volume

2

Issue

2

fYear

1996

Firstpage

35

Lastpage

41

Abstract

In this article, the authors discuss power transformer protective system philosophies and illustrate the selection alternatives through examples. Transformer inrush currents, overload capability, protective device performance for different fault types, winding connections and the impact on operating concerns are discussed. Their emphasis is on power transformers applied within an industrial facility that are rated 2500 kVA and below, and where the overcurrent device is normally a fuse

Keywords

electrical faults; industrial power systems; overcurrent protection; power system protection; power transformer protection; transformer windings; fault types; industrial facility; inrush currents; overcurrent protection selection; overload capability; protective device performance; three-phase power transformers; winding connections; Electrical equipment industry; Fault currents; Fuses; Industrial plants; Industrial power systems; Phase transformers; Power system faults; Power system protection; Safety; Surge protection;

fLanguage

English

Journal_Title

Industry Applications Magazine, IEEE

Publisher

ieee

ISSN

1077-2618

Type

jour

DOI

10.1109/2943.485761

Filename

485761