A 3-phase transformer is assembled by connecting three 720 -VA, 360/120 V single phase transformers in Y-delta connection. The constants for each transformer are. On HV side R₁=18.9 ohm X₁= 21.6 ohm On low voltage side R₂= 2.1 ohm X₂ = 2.4 ohm Obtain per phase equivalent circuit of this 3-phase transformer. What is the line-voltage rating and VA rating of the 3-phase transformer? HINT: convert to Y first If the secondary side is connected to a load which draws half of rated current at 0.5 power factor at rated voltage, what is the line voltage applied to the 3-phase transformer?

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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A 3-phase transformer is assembled by connecting three 720 -VA, 360/120 V single phase
transformers in Y-delta connection. The constants for each transformer are.
On HV side R₁-18.9 ohm X₁= 21.6 ohm On low voltage side R₂= 2.1 ohm X₂ = 2.4 ohm
Obtain per phase equivalent circuit of this 3-phase transformer.
What is the line-voltage rating and VA rating of the 3-phase transformer?
HINT: convert to Y first
If the secondary side is connected to a load which draws half of rated current at 0.5 power
factor at rated voltage, what is the line voltage applied to the 3-phase transformer?
Transcribed Image Text:A 3-phase transformer is assembled by connecting three 720 -VA, 360/120 V single phase transformers in Y-delta connection. The constants for each transformer are. On HV side R₁-18.9 ohm X₁= 21.6 ohm On low voltage side R₂= 2.1 ohm X₂ = 2.4 ohm Obtain per phase equivalent circuit of this 3-phase transformer. What is the line-voltage rating and VA rating of the 3-phase transformer? HINT: convert to Y first If the secondary side is connected to a load which draws half of rated current at 0.5 power factor at rated voltage, what is the line voltage applied to the 3-phase transformer?
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