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.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Transcribed Image Text: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.
(7) Five hours when not pregnant.
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