Current Transformer with Toroidal Nanocrystalline Alloy Core

Current Transformer with Toroidal Nanocrystalline Alloy Core

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...

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Veröffentlicht in:Revista IEEE América Latina 2006-05, Vol.4 (3), p.160-164
Hauptverfasser: Luciano, Benedito Antonio, Silverio Freire, Raimundo Carlos, de Assis Lira, Jose Gutembergue, Fontgalland, Glauco, de Castro, Walman Benicio
Format: Artikel
Sprache:eng
Schlagworte:
Compensation
Core loss
current transformer
Current transformers
Devices
Electronic switching systems
Error compensation
Magnetic circuits
Magnetic cores
Magnetic properties
nanocrystalline alloys
Nanocrystals
Passive components
Permeability
Saturation magnetization
Switching
toroidal cores
Toroidal magnetic fields
Transformer cores
Transformers
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Beschreibung
Zusammenfassung: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.
ISSN:1548-0992
1548-0992
DOI:10.1109/TLA.2006.4472108