A single phase transformer has a net core area of 60 sq cm. The primary having 400 turns isconnected to a 550 V supply. What is the flux density in the core? The supply frequency is 60Hz.In a 25KVA single phase transformer the core loss and full load copper losses are respectively320 and 380 Watts. A) What is the efficiency at half load and 0.866 power factor lagging? B)Determine the load in kVA in which the efficiency is maximum.A 19KVA transformer steps down from 3300V to 240V. The resistance of the primary and thesecondary windings are 6 ohms and 0.04 ohms respectively and the reactances are 2.5 timesthe resistance in each case. Calculate the secondary terminal voltage when the transformer isdelivering full load current at unity of.A 20KVA, 440/220v, single phase transformer has an iron loss of 324W. The copper loss isfound to be 100W when delivering half load current. Determine its efficiency when deliveringfull load current at 0.8 lagging pf.

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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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