a) b) c) d) A 20-KVA, 8000:480-V distribution transformer has the following resistances and reactances: R₂ = 32 ohm Xp=45 ohm P R=250,000 ohm R = 0.05 ohm X = 0.06 ohm XM=30,000 ohm The excitation branch impedances are referred to the high-voltage side. Find the equivalent circuit of the transformer referred to the high-voltage side. Find the per unit equivalent circuit of this transformer. Assume that the transformer is supplying rated load at 480 V and 0.8 power factor lagging. What is this transformer's input voltage? What is its voltage regulation? What is this transformer's efficiency under the conditions of part (c)?

a) b) c) d) A 20-KVA, 8000:480-V distribution transformer has the following resistances and reactances: R₂ = 32 ohm Xp=45 ohm P R=250,000 ohm R = 0.05 ohm X = 0.06 ohm XM=30,000 ohm The excitation branch impedances are referred to the high-voltage side. Find the equivalent circuit of the transformer referred to the high-voltage side. Find the per unit equivalent circuit of this transformer. Assume that the transformer is supplying rated load at 480 V and 0.8 power factor lagging. What is this transformer's input voltage? What is its voltage regulation? What is this transformer's efficiency under the conditions of part (c)?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.

Question

answer all pls thank u provide soln ty ty

a)
b)
c)
d)
A 20-KVA, 8000:480-V distribution transformer has the following resistances
and reactances:
R$ = 0.05 ohm
X = 0.06 ohm
XM = 30,000 ohm
The excitation branch impedances are referred to the high-voltage side.
Find the equivalent circuit of the transformer referred to the high-voltage
side.
Find the per unit equivalent circuit of this transformer.
Assume that the transformer is supplying rated load at 480 V and 0.8 power
factor lagging. What is this transformer's input voltage? What is its voltage
regulation?
What is this transformer's efficiency under the conditions of part (c)?
R₂= 32 ohm
X₂= 45 ohm
Rc=250,000 ohm

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