doi:10.24084/repqj18.487engLaso, A.Martínez, R.Manana, M.Cervero, D.Sáez, J.A.A comparative between IEEE and EN in the transformer derating when supplying nonsinusoidal load current. A practical caseART-2020-120578Nowadays, power quality is a challenge for the distribution companies since the new energy policies are directed to a distributed generation system with power electronic based technologies. The reduction of distribution transformers capability when supplying nonsinusoidal load currents has a major impact within capacity reduction in distribution networks produced by technical losses. IEEE Std C57.110-2018, EN-50464-3 and EN50541-2 define procedures to derate transformers when supplying nonsinusoidal load currents. The aim of this paper is to compare these procedures through a real case distribution transformer that suffers problems due to high levels of current distortion.2020http://zaguan.unizar.es/record/9615210.24084/repqj18.487http://zaguan.unizar.es/record/96152oai:zaguan.unizar.es:96152info:eu-repo/grantAgreement/EC/H2020/864579/EU/Interoperable solutions for implementing holistic FLEXIbility services in the distribution GRID/FLEXIGRIDThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 864579-FLEXIGRIDinfo:eu-repo/grantAgreement/ES/MCIU-AEI-FEDER/RTC-2017-6782-3Renewable Energy and Power Quality Journal 18 (2020), 747-752by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess