A 20 kVA, 2200 / 220 V, 50 Hz transformer for predetermination of efficiency and regulation as follows, O.C test:220 V, 4.2 A, 148 W (L.V.side) S.C.test: 86 V, 10.5 A, 360 W (H.V.side) Determine, i) Efficiency at full load at 0.8 pf lag and ii) Regulation at 3/4 full loads 0.8 p.f.lead.

A 20 kVA, 2200 / 220 V, 50 Hz transformer for predetermination of efficiency and regulation as follows, O.C test:220 V, 4.2 A, 148 W (L.V.side) S.C.test: 86 V, 10.5 A, 360 W (H.V.side) Determine, i) Efficiency at full load at 0.8 pf lag and ii) Regulation at 3/4 full loads 0.8 p.f.lead.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

A 20 kVA, 2200/ 220 V, 50 Hz transformer for predetermination of efficiency
and regulation as follows,
O.C test :220 V, 4.2 A, 148 W (L.V.side)
S.C.test: 86 V, 10.5 A, 360 W (H.V.side)
Determine,
i) Efficiency at full load at 0.8 pf lag and ii) Regulation at 3/4 full
loads 0.8 p.f.lead.

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