(a) A high voltage 3 phase induction motor operating at rated powwer can be representedby a balanced delta connected load (ZRY etc) of (350 +j100) 2 and is connected toa 3-phase, 11kV and 50 Hz supply.Draw the circuit diagram, indicating VRN, VRY and all load phase, and line currents.Calculate:(i)The three load phase currents (IRY, IYB and IBR).(1i)The three line currents (IR, ly and IB).The total real power (W) and reactive power (VAr) power at the 3phase supply.(iii)(b)A fault condition in the above load in Q1(a) causes the impedance of ZRY to reduceto (100+j40) 2, but the other two impedances remain at (350 +jl100) 2.Using the information above:(i)Calculate the 3 load phase currents (IRY, IYB and IBR).Draw a scaled phasor diagram indicating all phase and line voltagesand the three load phase currents.(ii)Using the scaled phasor diagram or otherwise determine the 2 linecurrents (IR and Iy).(111)(c) Specify the relevant measurements for each wattmeter in the 2 wattmeter method,and determine the total real supply power (W) for Q1(b) based on the 2 wattmetermeasurements.

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A high voltage 3 phase induction motor operating at rated power can be represented by a balanced delta connected load (ZRY etc) of (350+j100) and is connected to a 3-phase, 11kV and 50 Hz supply. Draw the circuit diagram, indicating VRN, VRY and all load phase, and line currents, Calculate: (i) The three load phase currents (IRY, IYB and IBR). (ii) The three line currents (IR, ly and IB). (iii) The total real power (W) and reactive power (VAr) power at the 3 phase supply.

A high voltage 3 phase induction motor operating at rated power can be represented by a balanced delta connected load (ZRY etc) of (350+j100) and is connected to a 3-phase, 11kV and 50 Hz supply. Draw the circuit diagram, indicating VRN, VRY and all load phase, and line currents, Calculate: (i) The three load phase currents (IRY, IYB and IBR). (ii) The three line currents (IR, ly and IB). (iii) The total real power (W) and reactive power (VAr) power at the 3 phase supply.

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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