محوّل مثلثي نجمي Dy Μετασχηματιστής τρίγωνο-αστέρας transformeur delta-star Transformatore Triangolo-stella Transformateur triangle étoile Transformator Dy Transformátor Dy Transformator Driehoek/Ster Author: The QElectroTech team License: see http://qelectrotech.org/wiki/doc/elements_license