1. Why is it not adjustable to carry or the same experiment for large transformers? 2. What method you have to apply to determine the efficiency of large transformer? 3. Draw the vecctor diagram for unity, leading p.f and lagging p.f at rated secondary current?

1. Why is it not adjustable to carry or the same experiment for large transformers? 2. What method you have to apply to determine the efficiency of large transformer? 3. Draw the vecctor diagram for unity, leading p.f and lagging p.f at rated secondary current?

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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Concept explainers

Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output pin and two input pins. The basic role of an opamp is to amplify the voltage difference between the two input voltages. It is also used in filtering or to perform mathematical operations or in signal conditioning.

Question

1. Why is it not adjustable to carry or the same experiment for large
transformers?
2. What method you have to apply to determine the efficiency of large
transformer?
3. Draw the vecctor diagram for unity, leading p.f and lagging p.f at rated
secondary current?

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QUESTIUNDH 1. Why is it not adjustable to carry or the same experiment for large transformers? 2. What method you have to apply to determine the efficiency of large transformer? 3. Draw the vector diagram for unity, leading p.f and lagging p.f at rated secondary current?
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
2- Proved that a resistance of (R¡ )in primary is equivalent to (R1 K’ )in secondary.? 3- A 40-kVA, 3,300/240-V, 50 Hz, 1-phase transformer has 660 turns on the primary. Determine (a) the number of turns on the secondary (b) the maximum value of flux in the core (c) the approximate value of primary and secondary full-load currents. Internal drops in the windings are to be ignored.
Q/A 5KA, 220/110 Volt Single phase transformer has a maximum effeciemcy: 93% at 0.8 rated lond 0.6 2.f. Find the effeciency at rated load inity P.f?