A 50-KVA 2400:240-V 60-Hz distribution transformer has a leakage impedance of 0.72 + j0.922 in the high-voltage winding and 0.0070+ j0.0090 2 in the low-voltage winding. At rated voltage and frequency, the impedance Z, of the shunt branch (equal to the impedance of R. and jXm in parallel) accounting for the exciting current is 6.32 + j43.7 52 when viewed from the low-voltage side. Draw the equivalent circuit referred to (a) the high-voltage side and (b) the low-voltage side, and label the impedances numerically.

A 50-KVA 2400:240-V 60-Hz distribution transformer has a leakage impedance of 0.72 + j0.922 in the high-voltage winding and 0.0070+ j0.0090 2 in the low-voltage winding. At rated voltage and frequency, the impedance Z, of the shunt branch (equal to the impedance of R. and jXm in parallel) accounting for the exciting current is 6.32 + j43.7 52 when viewed from the low-voltage side. Draw the equivalent circuit referred to (a) the high-voltage side and (b) the low-voltage side, and label the impedances numerically.

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

A 50-KVA 2400:240-V 60-Hz distribution transformer has a leakage impedance of 0.72 +
j0.922 in the high-voltage winding and 0.0070+ j0.0090 $2 in the low-voltage winding. At
rated voltage and frequency, the impedance Z, of the shunt branch (equal to the impedance of
R. and jXm in parallel) accounting for the exciting current is 6.32 + j43.7 52 when viewed
from the low-voltage side. Draw the equivalent circuit referred to (a) the high-voltage side and
(b) the low-voltage side, and label the impedances numerically.

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