A 500-KVA, 3-phase, 50-Hz transformer has a voltage ratio (line voltages) of 33/11-kV. The resistances per phase are: high voltage 35 22, low voltage 0.876 2 and the iron loss is 3050 W. Calculate the ff. parameters if the transformer is (a) open delta connected. Parameters: 1. Primary phase voltage 2. Secondary phase voltage 3. Ratio of Transformation

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 3.37P: Three single-phase two-winding transformers, each rated 25MVA,54.2/5.42kV, are connected to form a...
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A 500-kVA, 3-phase, 50-Hz transformer has a voltage ratio (line voltages) of 33/11-kV.
The resistances per phase are: high voltage 35 , low voltage 0.876 and the iron loss
is 3050 W. Calculate the ff. parameters if the transformer is (a) open delta connected.
Parameters:
1. Primary phase voltage
2. Secondary phase voltage
3. Ratio of Transformation
4. Primary phase current
5. Secondary phase current
6. Equivalent resistance per phase referred to the primary
7. Equivalent resistance per phase referred to the secondary
8. Full Load copper loss
9. Full Load core loss |
10. Efficiency at full load 0.8 pf
Transcribed Image Text:A 500-kVA, 3-phase, 50-Hz transformer has a voltage ratio (line voltages) of 33/11-kV. The resistances per phase are: high voltage 35 , low voltage 0.876 and the iron loss is 3050 W. Calculate the ff. parameters if the transformer is (a) open delta connected. Parameters: 1. Primary phase voltage 2. Secondary phase voltage 3. Ratio of Transformation 4. Primary phase current 5. Secondary phase current 6. Equivalent resistance per phase referred to the primary 7. Equivalent resistance per phase referred to the secondary 8. Full Load copper loss 9. Full Load core loss | 10. Efficiency at full load 0.8 pf
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