ontent introduction shortcircuit in power transformers overview fault types and severity reliability and failure rates international standards shortcircuit performance thermal and mechanical capabilities shortcircuit current characterization and dynamic effect shortcircuit forces, failure modes, tap changers position, aging effects residual pressing forces shortcircuit and power transformer design design steps (fault current; SC forces; SC stresses; design criteria) experiences shortcircuit full test test needs, results and failure rates reference list advanced materials and technologies conclusions recommendations technical specification – Tender and Design performance verification – Design Review andor Full SC Test