A 10 kVA three-phase transformer is loaded with a back power factor of 0.9, while the loading ratio is 50% and operates at maximum efficiency. The primary interphase voltage of this transformer is 10kV and it is delta connected. The equivalent circuit iron resistance reduced to the primary is 500 kiloOhms. What is the percent efficiency of the transformer when operating under the specified load? a) 88.24 b)78.95 c)85.71 d)83.33 e)92.31
A 10 kVA three-phase transformer is loaded with a back power factor of 0.9, while the loading ratio is 50% and operates at maximum efficiency. The primary interphase voltage of this transformer is 10kV and it is delta connected. The equivalent circuit iron resistance reduced to the primary is 500 kiloOhms. What is the percent efficiency of the transformer when operating under the specified load? a) 88.24 b)78.95 c)85.71 d)83.33 e)92.31
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.63P: A 23/230-kV step-up transformer feeds a three-phase transmission line, which in turn supplies a...
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A 10 kVA three-phase transformer is loaded with a back power factor of 0.9, while the loading ratio is 50% and operates at maximum efficiency. The primary interphase voltage of this transformer is 10kV and it is delta connected. The equivalent circuit iron resistance reduced to the primary is 500 kiloOhms. What is the percent efficiency of the transformer when operating under the specified load?
a) 88.24 b)78.95 c)85.71 d)83.33 e)92.31
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