A transformer rated 1-kVA, 240/120, 60 Hz. Because of an emergency, the transformer has to be used on a 50 Hz system. If the flux density in the transformer core is to be kept the same at 60 Hz and 240 volts, what is the volt- ampere rating at 50 Hz? A. 0.833 kVA. B. 1.211 KVA C. 0.766 KVA D. 0.899 KVA

A transformer rated 1-kVA, 240/120, 60 Hz. Because of an emergency, the transformer has to be used on a 50 Hz system. If the flux density in the transformer core is to be kept the same at 60 Hz and 240 volts, what is the volt- ampere rating at 50 Hz? A. 0.833 kVA. B. 1.211 KVA C. 0.766 KVA D. 0.899 KVA

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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Q1: During the separation of transformer core losses experiment: 1. Why should always keep the ratio of V/F constant? 2. If the transformer is operated at rated frequency but at voltage lower than rated value, how do you expect the following quantities to change? And why? i. Hysteresis loss ii. Eddy current loss iii. No-load current