Which of the following statement is correct for 3 phase 4 wire ac distribution systems?O Under unbalanced condition the net current through the neutral is zero.O It is practically possible to obtain perfect balancing in the systemO The electric utilities try to unbalance the load on each phaseO The unbalancing is due to the presence of single phase loads

Answered: Which of the following statement is…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Which of the following statement is correct for 3 phase 4 wire ac distribution systems?
O Under unbalanced condition the net current through the neutral is zero.
O It is practically possible to obtain perfect balancing in the system
O The electric utilities try to unbalance the load on each phase
O The unbalancing is due to the presence of single phase loads

Expert Solution

Explanation

Option (a):- Under the unbalanced condition, the net current through the neutral is not zero. The unbalanced current passes through the neutral. Under the balanced condition, the current through the neutral is zero

$I_{A} + I_{B} + I_{C} = 0$

Option (b):- Practically it is not possible to obtain a perfect three-phase balanced system.

Option(c): The electric utilities try to balance the load on each phase.

Option(d): Correct option. The unbalancing is due to the presence of single-phase loads.

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