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An unbalanced 4 wire star connected load consisting of the phase impedances Zes (15-j5)2. Zs (10+j0X2 and Zas (18-j6)Q is connected to a 3-phase, 440V. 50HZ supply. Draw the circuit diagram including the implementation of a 2 wattmeter power measurement and from this: (b) (1) (i1) Calculate the 3 line currents (IR. /Y and /e). Construct a scaled phasor diagram and using this or otherwise determine the star/neutral current Isv. Include VRy and VRs on the phasor diagram. Calculate the necessary wire diameter for the star/ncutral connection to achieve a current density of 3A/mm. (iii) (c) Determine the total real supply power (W) for Q1(b) based on the 2 wattmeter measurements.

An unbalanced 4 wire star connected load consisting of the phase impedances Zes (15-j5)2. Zs (10+j0X2 and Zas (18-j6)Q is connected to a 3-phase, 440V. 50HZ supply. Draw the circuit diagram including the implementation of a 2 wattmeter power measurement and from this: (b) (1) (i1) Calculate the 3 line currents (IR. /Y and /e). Construct a scaled phasor diagram and using this or otherwise determine the star/neutral current Isv. Include VRy and VRs on the phasor diagram. Calculate the necessary wire diameter for the star/ncutral connection to achieve a current density of 3A/mm. (iii) (c) Determine the total real supply power (W) for Q1(b) based on the 2 wattmeter measurements.

Introductory Circuit Analysis (13th Edition)
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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An unbalanced 4 wire star connected load consisting of the phase impedances Zes (15-j5)2. Zs (10+j0X2 and Zas (18-j6)Q is connected to a 3-phase, 440V. 50HZ supply. Draw the circuit diagram including the implementation of a 2 wattmeter power measurement and from this: (b) Calculate the 3 line currents (IR. /Y and /e). Construct a scaled phasor diagram and using this or otherwise determine the star/neutral current IsN. Include VRy and VRs on the phasor diagram. Calculate the necessary wvire diameter for the star/neutral connection to achieve a current density of 3A/mm. (1) (i1) (iii) (c) Determine the total real supply power (W) for Q1(b) based on the 2 wattmeter measurements.
Transcribed Image Text:An unbalanced 4 wire star connected load consisting of the phase impedances Zes (15-j5)2. Zs (10+j0X2 and Zas (18-j6)Q is connected to a 3-phase, 440V. 50HZ supply. Draw the circuit diagram including the implementation of a 2 wattmeter power measurement and from this: (b) Calculate the 3 line currents (IR. /Y and /e). Construct a scaled phasor diagram and using this or otherwise determine the star/neutral current IsN. Include VRy and VRs on the phasor diagram. Calculate the necessary wvire diameter for the star/neutral connection to achieve a current density of 3A/mm. (1) (i1) (iii) (c) Determine the total real supply power (W) for Q1(b) based on the 2 wattmeter measurements.
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