Obtain the equivalent circuit of a 200/400 V, 50 Hz, single-phase transformcr from the following testdata:O.C. test : 200 V, 0-7 A, 70 W .. on L.V. sideS.C. test : 15 V, 10 A, 85 WCalculate the secondary voltage when delivering S kW at 08 p.f. lagging, the primary voltage being. on H.V. side200 V.(R, = 57-14 Q ; X, = 330 2; R = 0-21 Q ; Xg, = 0-31 Q ; 3778 V)

Equivalent core-loss resistance to L.V. side Req=200270=57.14 Ω Apparent power under no-load…

Obtain the equivalent circuit of a 200/400 V, 50 Hz, single-phase transformer from the following test data: O.test : 200 V,0-7 A, 70 W S.C. test: 15 V, 10 A, 85 W Calculate the secondary voltage when delivering 5 kW at 0-8 p.f. lagging, the primary voltage being - on L.V. side . on H.V. side 200 V. IR, = 57-14 ; X, = 330 A; R, = 0-21 Q ; X,, = 0-3I Q ; 3778 V)

Obtain the equivalent circuit of a 200/400 V, 50 Hz, single-phase transformer from the following test data: O.test : 200 V,0-7 A, 70 W S.C. test: 15 V, 10 A, 85 W Calculate the secondary voltage when delivering 5 kW at 0-8 p.f. lagging, the primary voltage being - on L.V. side . on H.V. side 200 V. IR, = 57-14 ; X, = 330 A; R, = 0-21 Q ; X,, = 0-3I Q ; 3778 V)

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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The test results of a 5 kVA, 400/200 V, 50 Hz, single phase transformer are as follows. O.C. Test: 400 V, 1 A, 50 W, H.V. side S.C. Test: 12 V, 12.5 A, 60 W, H.V. side Find the full load efficiency and regulation when the power factor is 0.8 lagging.
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Q2// Calculate the efficiency of transformer on full load at 0-8 p.f. lagging for a 25 KVA 440/220-V, 50-Hz, single -phase transformer from the following test data: Open circuit test : 220 V, 9.6 A, 710 W- on L.V. side. Short circuit test : 42 V, 57 A, 1030 W- on H.V. side.
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P:11) Solve all parts.