Question

In an open-circuit test of a 25 KVA, 2400/240 V transformer made on the low side, the readings of amperes, volts, and watts are respectively 1.6, 240, and 114. In the short-circuit test, the low side is short-circuited and the current, voltage, and power to the high side are measured to be respectively 10.4 A, 55 V, and 360 W. Find the following: a) The core loss. b) The full load copper loss. c) The efficiency of the transformer on full load and 0.8 power factor leading.

Name: 1 in an open circuit test of a 25 kva 2400240 v transformer made on the low side the readings of amperes volts and watts are respectively 16 240 and 114 in the short circuit test the low sid 92537
Uploaded: 2023-07-01T10:20:23-08:00
Duration: 5 min 31 s
Channel: Sri K
Description: 1 in an open circuit test of a 25 kva 2400240 v transformer made on the low side the readings of amperes volts and watts are respectively 16 240 and 114 in the short circuit test the low sid 92537

          In an open-circuit test of a 25 KVA, 2400/240 V transformer made on the low side, the readings of amperes, volts, and watts are respectively 1.6, 240, and 114. In the short-circuit test, the low side is short-circuited and the current, voltage, and power to the high side are measured to be respectively 10.4 A, 55 V, and 360 W. Find the following:
a) The core loss.
b) The full load copper loss.
c) The efficiency of the transformer on full load and 0.8 power factor leading.

Added by Dawn P.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Sri K

07/01/2023

Step 1

The core loss, also known as iron loss, can be determined from the open-circuit test. The power measured during the open-circuit test is primarily due to the core loss since the copper loss (I²R loss) is negligible at no load. Therefore, the core loss is equal to Show more…

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In an open-circuit test of a 25 KVA, 2400/240 V transformer made on the low side, the readings of amperes, volts, and watts are respectively 1.6, 240, and 114. In the short-circuit test, the low side is short-circuited and the current, voltage, and power to the high side are measured to be respectively 10.4 A, 55 V, and 360 W. Find the following: a) The core loss. b) The full load copper loss. c) The efficiency of the transformer on full load and 0.8 power factor leading.