Irani, Y.Lapthorn, A.Bodger, P.2014-04-172014-04-172013Irani, Y., Lapthorn, A., Bodger, P. (2013) Equivalent Circuit Model of Cascade Connected Partial Core Resonant Transformers. Hobart, Australia: Australasian Universities Power Engineering Conference (AUPEC 2013), 29 Sep-3 Oct 2013. 4pp.http://hdl.handle.net/10092/9135“© 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”This paper presents a proof of concept and equivalent circuit analysis of a cascade arrangement of tunable HV testing transformers intended for field use. The transformers use a partial core with air completing the flux path and are tuned to resonate with insulation capacitance. This minimises the power drawn from the supply and the size and weight of the transformer. A prototype set of transformers were built to validate the model. Each transformer was modelled as a set of coupled inductors to determine the input impedance frequency response. Good agreement is shown between the modelled and measured input impedance. The inclusion of core loss resistance was shown to significantly increase the accuracy of the cascade model.enConference Contributions - PublishedField of Research::09 - Engineering::0906 - Electrical and Electronic Engineering::090601 - Circuits and Systems