Open AccessInfluence of electromagnetic forces in the gaps of a protective CT
Author(s) -
Suassuna de Andrade Ferreira Regelii,
Fernandes de Araujo Jalberth,
Andrade Filipe L.M.,
Costa Edson G.,
Guerra Francisco C.F.
Publication year - 2018
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2017.0428
Subject(s) - fragility , residual , ferromagnetism , saturation (graph theory) , core (optical fiber) , materials science , physics , condensed matter physics , computer science , mathematics , composite material , algorithm , combinatorics , thermodynamics
Two of the main problems studied in protective current transformers (CTs) are the saturation and residual flux in the ferromagnetic core. To minimise the effects of high saturation levels and residual flux, a gapped core CT can be employed. Although solving both issues, research reports that the introduction of gaps in the ferromagnetic core can develop into a mechanical fragility when compared with a closed core. However, the fragility is not proven in the research. To investigate the mechanical fragility of a gapped core CT, this research aims to verify the influence of the electromagnetic forces in the gap borders of a protective CT under a short‐circuit condition. The influence was verified in three different gap lengths: 8, 16 and 24 mm. On the basis of the results, the electromagnetic forces in the gap borders of a protective CT did not influence the CT response.