CSA C802.5:16 (R2020)

This is the first edition of CSA C802.5, Guideline for evaluating the efficiency of dry-type transformers under non-linear loading.

CSA Group acknowledges that the development of this Guideline was made possible, in part, by the financial support of Natural Resources Canada, BC Hydro, Manitoba Hydro, Hydro Québec, Canadian Electricity Association, Nova Scotia Department of Energy, and Efficiency One.

Scope:

1.1

This Guideline applies to three-phase dry-type transformers subjected to harmonics current up to the 49th harmonic.

1.2

This Guideline covers transformers, self-contained units or components of larger assemblies, 60 Hz, ANN, rated 15 to 500 kVA three-phase, two winding low voltage distribution transformers with maximum winding voltage of 1.2 kV.

1.3

The principles covered in this Guideline may be applied to other transformers, not covered in this Guideline, with due consideration of any special situation or application.

1.4

This Guideline contains no requirements. In this Guideline, “should” is used to express a recommendation or that which is advised and “may” is used to express an option or that which is permissible within the limits of the Guideline.