Transformador de Corrente com Núcleo Toroidal de Liga Nanocristalina (Current Transformer with Toroidal Nanocrystalline Alloy Core)

Benedito Antonio Luciano (benedito@dee.ufcg.edu.br)1, Raimundo Carlos Silvério Freire (freire@dee.ugcg.edu.br)1, José Gutembergue de Assis Lira (lira@gmail.com)1, Glauco Fontgalland (fontgalland@dee.ufcg.edu.br)1, Walman Benício de Castro (walman@dem.ufcg.edu.br)2


1Unidade Acadêmica de Engenharia Elétrica, Universidade Federal de Campina Grande, Campina Grande ‑ PB ‑ Brazil
2Unidade Acadêmica de Engenharia Mecânica, Universidade Federal de Campina Grande, Campina Grande ‑ PB ‑ Brazil

This paper appears in: Revista IEEE América Latina

Publication Date: May 2006
Volume: 4,   Issue: 3 
ISSN: 1548-0992


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.

Index Terms:
current transformer, nanocrystalline alloys, toroidal cores   


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