A 15-KVA, 2400/240-V transformer is to be tested to determine its excitation branch components, its series impedances and its voltage regulation. The following test data have been taken from the primary side of the transformer: Open- circuit test Voc = 2400 V loc = 0.25 A Poc = 50 W Short-circuit test Vsc = 48 V Isc = 6.0 A Psc = 200 W Pg103 The data have been taken by using the connections of open-circuit test and short-circuit test a. Find the equivalent circuit of this transformer referred to the high-voltage side. b. Find the equivalent circuit of this transformer referred to the low-voltage side. c. Calculate the full-load voltage regulation at 0.8 lagging power factor and 0.8 leading power factor. d. What is the efficiency of the transformer at full load with a power factor of 0.8 lagging?

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Assignment 3
A 15-KVA, 2400/240-V transformer is to be
tested to determine its excitation branch
components, its series impedances and its
voltage regulation. The following test data
have been taken from the primary side of the
transformer:
Short-circuit test
Open- circuit test
Voc = 2400 V
loc = 0.25 A
Poc = 50 W
Vsc = 48 V
Isc = 6.0 A
Psc = 200 W
Pg103
The data have been taken by using the connections
of open-circuit test and short-circuit test
a. Find the equivalent circuit of this transformer
referred to the high-voltage side.
b. Find the equivalent circuit of this transformer
referred to the low-voltage side.
c. Calculate the full-load voltage regulation at 0.8
lagging power factor and 0.8 leading power factor.
d. What is the efficiency of the transformer at full
load with a power factor of 0.8 lagging?
Transcribed Image Text:Assignment 3 A 15-KVA, 2400/240-V transformer is to be tested to determine its excitation branch components, its series impedances and its voltage regulation. The following test data have been taken from the primary side of the transformer: Short-circuit test Open- circuit test Voc = 2400 V loc = 0.25 A Poc = 50 W Vsc = 48 V Isc = 6.0 A Psc = 200 W Pg103 The data have been taken by using the connections of open-circuit test and short-circuit test a. Find the equivalent circuit of this transformer referred to the high-voltage side. b. Find the equivalent circuit of this transformer referred to the low-voltage side. c. Calculate the full-load voltage regulation at 0.8 lagging power factor and 0.8 leading power factor. d. What is the efficiency of the transformer at full load with a power factor of 0.8 lagging?
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