Answer only for c1 (ii) C1 (i). The output of the 3-phase, 410 V induction motor is 15 kW and operates at power factor of0.7 lagging with an efficiency of 81 %. Calculate the reading on each of the two wattmeterconnected to measure the input.The value of P1The value of P2C1 (ii). Three Identical capacitors are connected in star to 415 Volts, F = 50 Hz, 3 phase supply. Ifthe line current is 12 A. Calculate its reactance and capacitance value.Reactance XcThe capacitance of each capacitor, C

Answered: C1 (ii). Three lIdentical capacitors…

C1 (ii). Three lIdentical capacitors are connected in star to 415 Volts, F = 50 Hz, 3 phase supply. If the line current is 12 A. Calculate its reactance and capacitance value.

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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Concept explainers

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.

Question

Answer only for c1 (ii)

C1 (i). The output of the 3-phase, 410 V induction motor is 15 kW and operates at power factor of
0.7 lagging with an efficiency of 81 %. Calculate the reading on each of the two wattmeter
connected to measure the input.
The value of P1
The value of P2
C1 (ii). Three Identical capacitors are connected in star to 415 Volts, F = 50 Hz, 3 phase supply. If
the line current is 12 A. Calculate its reactance and capacitance value.
Reactance Xc
The capacitance of each capacitor, C

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