Calculate the daily efficiency of a single-phase transformer with an output capacity of 350 kVA at full load. If the losses of core and copper at full load are equal to 4.2 kW and 3.2 kW, respectively. If the transformer works during the day as follows: (1) Six hours at full pregnancy and at a factor of 0.85) lag. (ii) Three hours at three quarters of full load and with a power factor of 0.8 delayed. (iii) Six hours at a quarter of the full load and an amount of one is treated. (iv) Four hours at one fifth of full pregnancy and by a factor of one.
Calculate the daily efficiency of a single-phase transformer with an output capacity of 350 kVA at full load. If the losses of core and copper at full load are equal to 4.2 kW and 3.2 kW, respectively. If the transformer works during the day as follows: (1) Six hours at full pregnancy and at a factor of 0.85) lag. (ii) Three hours at three quarters of full load and with a power factor of 0.8 delayed. (iii) Six hours at a quarter of the full load and an amount of one is treated. (iv) Four hours at one fifth of full pregnancy and by a factor of one.
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 3.26P: A bank of three single-phase transformers, each rated 30MVA,38.1/3.81kV, are connected in Y- with a...
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