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Specifying dry-type distribution transformers for solid-state applications

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4 Author(s)
Kerszenbaum, I. ; Inst. Transformer Corp., Montebello, CA, USA ; Mazur, A. ; Mistry, M. ; Frank, J.

Existing theories, specification, and standards relating to the application of dry-type distribution transformers for solid-state applications are discussed. The criteria for selecting the proper transformer for several types of solid-state loads, such as UPSs, rectifiers, variable-speed drive systems, etc. are discussed. A significant set of computer-generated calculations that show the behavior of dry-type distribution transformers of various sizes and conductor configurations under both sinusoidal and nonsinusoidal conditions is presented. It is readily seen that improper selection of a transformer for a solid-state application may result in a serious reduction in efficiency as well as a large increase in temperature rises with detrimental effect on the expected life span of the transformer. A few experimental results from tests carried out on several transformers are presented

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Industry Applications, IEEE Transactions on  (Volume:27 ,  Issue: 1 )