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On the mechanical short-time rating of a current transformer
Date Issued
22-01-2009
Author(s)
Gopalakrishna, S.
Ilampoornan, M. K.
Jayashankar, V.
Abstract
Closed-form expressions and a finite-element method are used to compute the maximum force in the primary conductor of a wound current transformer (CT). It is shown that for a given volume for the primary winding, one configuration exists that leads to a maximum force. It is proved that the mechanical short-time rating of two CTs having different turns but identical ampere turns is not equivalent. Designers can now establish and test a CT with a worst-case configuration. © 2008 IEEE.
Volume
24