Title :
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
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;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/2943.485761
