= ▸ A 100-KVA, 2500/125-V, 50–Hz, step-down transformer has the following parameters: R₁ = 1.5Ω, Χ, = 2.8Ω, R, = 15mΩ, X, =20mΩ, Raj = 3kΩ, Χm = 5kΩ ▸ The transformer delivers 85% of the rated load at a terminal voltage of 115 V and a power factor of 0.866 lagging. Determine (a) the efficiency, and (b) the voltage regulation. Draw the phasor diagram of the transformer. ▸ Use the approximate equivalent circuit referred to the secondary side.
= ▸ A 100-KVA, 2500/125-V, 50–Hz, step-down transformer has the following parameters: R₁ = 1.5Ω, Χ, = 2.8Ω, R, = 15mΩ, X, =20mΩ, Raj = 3kΩ, Χm = 5kΩ ▸ The transformer delivers 85% of the rated load at a terminal voltage of 115 V and a power factor of 0.866 lagging. Determine (a) the efficiency, and (b) the voltage regulation. Draw the phasor diagram of the transformer. ▸ Use the approximate equivalent circuit referred to the secondary side.
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 3.16P: A single-phase, 50-kVA,2400/240-V,60-Hz distribution transformer has the following parameters:...
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Question
![▸ A 100-KVA, 2500/125-V, 50-Hz, step-down
transformer has the following parameters: R₁ =
1.5Ω, Χ,= 2.8Ω, R2 = 15mΩ, X, =20mΩ, Ri
¤ X₂
3kΩ, Xmi = 5kΩ
=
▶ The transformer delivers 85% of the rated load at
a terminal voltage of 115 V and a power factor of
0.866 lagging. Determine (a) the efficiency, and
(b) the voltage regulation. Draw the phasor
diagram of the transformer.
▸ Use the approximate equivalent circuit referred
to the secondary side.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa428aea3-9027-4501-a634-637113bb1be8%2Ffe1e35f2-510f-4b93-aa4b-de59512f2c1e%2Fpti7qrl_processed.jpeg&w=3840&q=75)
Transcribed Image Text:▸ A 100-KVA, 2500/125-V, 50-Hz, step-down
transformer has the following parameters: R₁ =
1.5Ω, Χ,= 2.8Ω, R2 = 15mΩ, X, =20mΩ, Ri
¤ X₂
3kΩ, Xmi = 5kΩ
=
▶ The transformer delivers 85% of the rated load at
a terminal voltage of 115 V and a power factor of
0.866 lagging. Determine (a) the efficiency, and
(b) the voltage regulation. Draw the phasor
diagram of the transformer.
▸ Use the approximate equivalent circuit referred
to the secondary side.
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Step 1: Stating the gven data
VIEWStep 2: The exact equivalent diagram,
VIEWStep 3: Finding iron losses
VIEWStep 4: finding the secondary current,
VIEWStep 5: Finding copper losses,
VIEWStep 6: (a) Finding the efficiency
VIEWStep 7: (b) Finding the voltage regulation,
VIEWStep 8: The phasor diagrams
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