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A 10 kVA, 1-ph transformer has a core-loss of 40 W and full load ohmic loss of 100 W. The daily variation of load on the transformer is as follows : 6 a.m. to 1 p.m. 3 kW at 0.60 p.f. 1 p.m. to 5 p.m. − 8kW at 0.8 p.f. 5 p.m. to 1 a.m. full load at u.p.f. 1 a.m. to 6 a.m. no load Determine all day efficiency of the transformer. Use two decimal places for final answer

A 10 kVA, 1-ph transformer has a core-loss of 40 W and full load ohmic loss of 100 W. The daily variation of load on the transformer is as follows : 6 a.m. to 1 p.m. 3 kW at 0.60 p.f. 1 p.m. to 5 p.m. − 8kW at 0.8 p.f. 5 p.m. to 1 a.m. full load at u.p.f. 1 a.m. to 6 a.m. no load Determine all day efficiency of the transformer. Use two decimal places for final answer

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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  1. A 10 kVA, 1-ph transformer has a core-loss of 40 W and full load ohmic loss of 100 W. The daily variation of load on the transformer is as follows :

6 a.m. to 1 p.m. 3 kW at 0.60 p.f.

1 p.m. to 5 p.m. − 8kW at 0.8 p.f.

5 p.m. to 1 a.m. full load at u.p.f.

1 a.m. to 6 a.m. no load

Determine all day efficiency of the transformer. Use two decimal places for final answer

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