Abstract
This paper introduces deep and carful theoretical and experimental investigations of the magnetizing inrush current (M.I.C.) phenomenon in single phase power transformers, All salient parameters influencing M.I.C. waveform and particushed by the control of the instant of switching the supply to the transformer, the factor which appreciably affects M.I.C.
Highlights
-A-BS-~-R-A-C-~-. ~his paper 1ntroduces deep and careful theorit1oal and, experimental 1nTestigatioDS of the magnetizing inrush current (K.I.e.) phenomenon in single phase power transformers, All salient parameters influencing I.C. waTeform and particushed by the control of the instant of switching the supply to the transformer, the factor which appreciably affects K.I.e
BR is the residual flux density in the oore when the switoh is closed at -1800 in Teala
A0l.l09th. e se cases are researched for a fhese figures explain for each CBse the instant of' having M.I.C. to be one and 0.05 p.u., 1.e., it yields the number of cycles after which M.l.C. having these values measured from the switching-on instant
Summary
The first few cycles ot the inrusn current have severe peake. The peak value of the nla cycle i. as followe(4), lpn ~ ({2 VIR) sin Bn. The peak value of the nla cycle i. (2) Regardi~ the peak value of the first cycle, we remark that it hes a limited value aa R/X ratio increases. E se cases are researched for a fhese figures explain for each CBse the instant of' having M.I.C. to be one and 0.05 p.u., 1.e., it yields the number of cycles after which M.l.C. having these values measured from the switching-on instant. (1) The number of cycles passed to rmve M.l.C. be one and 0.05 p.u. 1s the same independent of varying the type of core material. This conclUsion is obtained under the restriction of having BR O.H Bm'. It is recommended to have a core material of havfng high Bs value as practically as it is possible (like stalloy, )
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