Here are the links I posted above.
http://www.pge.com/includes/docs/pdfs/mybusiness/customerservice/energystatus/powerquality/harmonics.pdf
http://www.emersonnetworkpower.co.in/KnowledgeCenter/Whitepapers/K-FactorTransformer.pdf
http://www.powertransformer.us/transformerarticles/transformerkfactorrating.htm
.
http://www.pge.com/includes/docs/pdfs/mybusiness/customerservice/energystatus/powerquality/harmonics.pdf
http://www.emersonnetworkpower.co.in/KnowledgeCenter/Whitepapers/K-FactorTransformer.pdf
http://www.powertransformer.us/transformerarticles/transformerkfactorrating.htm
.