A 1, 10 kVA, 2400=240 V, 60 Hz distribution transformer has the following characteristics: Core loss at

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A 1φ, 10 kVA, 2400=240 V, 60 Hz distribution transformer has the following characteristics:

Core loss at full voltage = 100 W

Copper loss at half load = 60 W

(a) Determine the efficiency of the transformer when it delivers full load at 0.8 power factor lagging.

(b) Determine the per-unit rating at which the transformer efficiency is a maximum. Determine this efficiency if the load power factor is 0.9.

No load for 6 hours

70% full load for 10 hours at 0.8 PF

90% full load for 8 hours at 0.9 PF

Determine the all-day efficiency of the transformer.

Related Book For answer-question

Electric Machinery

ISBN: 978-0071230100

6th Edition

Authors: Charles Kingsley, Jr, Stephen D. Umans

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Posted Date: Mar 17, 2022 03:53 AM

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A 1, 10 kVA, 2400=240 V, 60 Hz distribution transformer has the following characteristics: Core loss at

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