Title :
Overvoltages on five legged core transformers on rural electric systems
Author :
Mairs, Dan D. ; Stuehm, Don L. ; Mork, Bruce
Author_Institution :
Power Syst. Eng., Alexandria, MN, USA
Abstract :
Five-legged-core, grounded-wye-grounded-wye, three-phase transformers can cause overvoltage conditions on an open phase when the primary is cable fed and single-phase switched. Field and laboratory test results on the overvoltage condition are given. An equivalent circuit of the transformer is evaluated and used to simulate laboratory and field test conditions. Techniques to minimize the overvoltage condition are discussed
Keywords :
equivalent circuits; overvoltage; power systems; power transformers; equivalent circuit; five legged core transformers; open phase; power transformers; rural electric systems; Circuit testing; Ferroresonance; IEEE members; Neodymium; Power cables; Power systems; Power transformer insulation; Surges; Transformer cores; Voltage;
Conference_Titel :
Rural Electric Power Conference, 1988. Papers Presented at the 32nd Annual Conference
Conference_Location :
Lexington, KY
DOI :
10.1109/REPCON.1988.11007
