Title :
Current Transformer with Toroidal Nanocrystalline Alloy Core
Author :
Luciano, Benedito A. ; Freire, Raimundo C S ; Lira, JoséGutembergue A. ; Fontgalland, Glauco ; De Castro, Walman B.
fDate :
5/1/2006 12:00:00 AM
Abstract :
An error compensation technique for measuring current transformers is described. It uses only passive components. An example is shown for current transformers installed in I50 kV switching devices. Initial ratio errors in the order of 4% and phase shifts around 20 min were reduced to 0.1% and 6 min after the compensation. The transformer with the compensation fulfils class 0.2 according to IEC standards.
Keywords :
Core loss; Current transformers; Electronic switching systems; Magnetic circuits; Magnetic cores; Magnetic properties; Permeability; Saturation magnetization; Toroidal magnetic fields; Transformer cores; current transformer; nanocrystalline alloys; toroidal cores;
Journal_Title :
Latin America Transactions, IEEE (Revista IEEE America Latina)
DOI :
10.1109/TLA.2006.4472108
