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Additional info for Ieee Std c57.129-1999 (Ieee Standard General Requirements And Test Code For Oil-Immersed Hvdc Converter Transformers)
Three current measurements should be taken at each frequency. A typical curve of loss vs. 2. For each harmonic frequency h the value of the loss adjustment factor (multiplier) Fh is calculated by taking the ratio of loss at the harmonic frequencies compared to the fundamental frequency loss. 2—Load loss vs. 3 Measurement of three-phase converter transformers (The following information is based on material presented in Ram et al. 2 for single-phase transformers, except that a three-phase oscillator, three-phase variable transformer, and three separate ampliﬁers are required.
This should be the winding of hottest temperature determined from the temperature-rise-type test. If required, the winding temperature may be corrected for the additional core loss and, if appropriate, tertiary loss added to the measured winding. ” The corrected winding temperature (average and hot spot) shall not be higher than those deﬁned and agreed to by the purchaser and manufacturer. If the transformer has an overload rating speciﬁed, the test should be performed considering the characteristics of the maximum summer time-ambient overload speciﬁed.
3, July 1988, pp. 1059–1066. [B8] The IEEE Standard Dictionary of Electrical and Electronics Terms, Sixth Edition. 9CIGRÉ publications are available from CIGRÉ Central Ofﬁce, 3-5 rue de Metz, F-75015 Paris, France. Copyright © 2000 IEEE. All rights reserved.
Ieee Std c57.129-1999 (Ieee Standard General Requirements And Test Code For Oil-Immersed Hvdc Converter Transformers)