Closure on "Proposed standards for frequency conversion factors of transformer performance parameters"

E.G. teNyenhuis
2003 IEEE Transactions on Power Delivery  
The authors [1] should be commended for their very interesting contribution. The paper is especially relevant because according to a U.S. Department of Commerce report [2] considering 245 countries around the world, it was found that 20% of them operate at 60 Hz, 75.17% operate at 50 Hz, and the remaining 4.82% operate at both 50 and 60 Hz. Transformers designed at 50 Hz work satisfactorily at 60 Hz, but the contrary is not true. Therefore, transformers for multicountry operation are designed
more » ... tion are designed at 50 Hz. Additionally, the designer needs to know the performance parameters at both frequencies. The paper establishes a base to convert transformer performance parameters between the two frequencies. There are, however, a few issues that we would like to discuss. 1) The paper makes no reference to conversion factors for %Z. From a test performed on a 750-kVA, 23 kV-220 V, (1 0 Y )
doi:10.1109/tpwrd.2003.817827 fatcat:ranqy3amvzewrocrjml2ff7mm4