Design and application of low ratio high accuracy split-core, core-balance current transformer

Author

Das, J.C. ; Mullikin, Randy

Author_Institution

AMEC, Inc., Atlanta, GA

fYear

2008

fDate

22-27 June 2008

Firstpage

192

Lastpage

201

Abstract

The paper describes the design and application of a split-core CT of large dimensions, specifically designed for mounting in 13.8 kV switchgear cubical on the phase bus bars. Though split-core CTpsilas of high current ratio are available, the authors believe that the core-balance CT described in this paper is unique, as no similar CT was readily available in the US/European market. Thus, there is no equivalent installation in the industry of the specifications described in the paper. The CT discussed in this paper was specifically designed to meet the requirements of dimensions and accuracy for sensitive ground fault and directional ground fault relaying.

Keywords

busbars; current transformers; fault diagnosis; power transformer protection; relay protection; switchgear; transformer cores; European market; core-balance current transformer; directional ground fault relaying; ground fault sensitivity; low ratio high accuracy split-core; phase bus bars; switchgear; voltage 13.8 kV; Bars; Cables; Circuit faults; Circuit testing; Current transformers; Magnetic cores; Relays; Switchgear; Thermal resistance; Transformer cores; CT saturation; Split-core; class C and T accuracies; core-balance current; transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Pulp and Paper Industry Technical Conference, 2008. PPIC 2008. Conference Record of 2008 54th Annual

Conference_Location

Seattle, WA

ISSN

0190-2172

Print_ISBN

978-1-4244-2524-2

Electronic_ISBN

0190-2172

Type

conf

DOI

10.1109/PAPCON.2008.4585808

Filename

4585808