Why for b) the Vry is to the phase 30 degrees. Q1(a)An industrial unit operating at rated power can be represented by a balanceddelta connected load (ZRY etc) of (600 + j120) N and is connected to a 3-phase, 11 kV and 50 Hz supply.フDraw the circuit diagram, indicating VRY, the yellow line current (IR) and theload phase current (IBr ).lineVoltayCalculate:(i)The three load phase currents (IRY, IYB and Ibr).(ii)The three line currents (IR, Iy and IB).(iii)The total real power, apparent power, reactive power andpower factor at the 3 phase supply.An unbalanced condition in the above load in Q1(a) causes the impedanceof ZRY to reduce to (450+j40) N, ZyB to reduce to (500 +j100) Q. and ZBr toremain the same.b2/2ncedtar(i)mer BUsing the information above:Calculate the 3 load phase currents (IRY, IYB and IBR).(ii)Draw a scaled phasor diagram indicating all phase and linevoltages, and the three load phase currents.(iii)Using the scaled phasor diagram or otherwise determine thethree line currents (IR, Iy and IB).(c)A 2 wattmeter measurement is made on the circuit in Q1(b). Wattmeter 1bases its measurements on VRY and IR, and Wattmeter 2 uses VBY and IB.Determine the power (W) measured by each wattmeter, and the resultanttotal 3 phase power. Confirm this measurement using any other suitablecaleulation.oba se pou

In this question we will write about line voltage phase.....

Q1 (a) An industrial unit operating at rated power can be represented by a balanc- delta connected load (ZRY etc) of (600 + j120) N and is connected to a phase, 11 kV and 50 Hz supply. line Draw the circuit diagram, indicating VRY, the yellow line current (Ir) and load phase current (IBR ). Volt2g Calculate: (i) The three load phase currents (IRY, IYB and IBR). (ii) The three line currents (IR, Iy and IB). (iii) The total real power, apparent power, reactive power ar power factor at the 3 phase supply. (b) of ZRY to reduce to (450+j40) N, ZYB to reduce to (500 +j100) Q. a remain the same. An unbalanced condition in the above load in Q1(a) causes the in mes 3 b2l2nced Using the information above:

Q1 (a) An industrial unit operating at rated power can be represented by a balanc- delta connected load (ZRY etc) of (600 + j120) N and is connected to a phase, 11 kV and 50 Hz supply. line Draw the circuit diagram, indicating VRY, the yellow line current (Ir) and load phase current (IBR ). Volt2g Calculate: (i) The three load phase currents (IRY, IYB and IBR). (ii) The three line currents (IR, Iy and IB). (iii) The total real power, apparent power, reactive power ar power factor at the 3 phase supply. (b) of ZRY to reduce to (450+j40) N, ZYB to reduce to (500 +j100) Q. a remain the same. An unbalanced condition in the above load in Q1(a) causes the in mes 3 b2l2nced Using the information above:

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.43P: A three-phase line, which has an impedance of (2+j4) per phase, feeds two balanced three-phase loads...

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