Loss evaluation in transformers based on IEC 60076
I. Definitions of Losses in IEC 6007IEC 60076-1 (General Requirements) and IEC 60076-7 (Loading Guidelines) specify two core types of losses:No-load Loss (P0)Definition: Losses measured when the primary winding is energized at rated voltage and the secondary winding is open-circuited (dominated by core losses).Test ConditionsMeasured at rated frequency and voltage (typically sinusoidal power frequency).Corrected to reference temperature (75°C for oil-immersed transformers, 115°C for dry-
