Temperature rise: The high-voltage transformer is continuously operated at an ambient temperature of 40 ° C or less and rated load. The temperature rise of the winding measured by the electric resistance method shall not exceed 65 ° C. Under this condition, the temperature rise of the upper insulating oil shall be measured by a thermometer and shall not exceed 60 ° C. , the highest temperature rise of the winding shall not exceed 80 °C
　　Rated capacity: When the high-voltage transformer is fully loaded at the lowest tap position of the full capacity, the temperature rise of each winding shall not exceed the specification of the specification.
　　Impedance: When the high voltage transformer is rated at the voltage tap and the winding temperature is converted to 75, the impedance based on the cold rated capacity shall comply with the provisions of 2.1.4. Short-circuit standard: The high-voltage transformer is short-circuit-resistant and should comply with the provisions of ANS C57.12
　　Overload standard: The transformer must be able to withstand loads above the rating of the nameplate
　　Radio interference voltage standard: The high frequency voltage generated by the transformer must not exceed the NEMA TR1 regulations.