A general procedure for dealing with harmonics is as follows: In a three-phase four-wire system, the 60 Hz part of the neutral current can be reduced by balancing the current on the phase conductors. If all phases have equal current flow, the neutral current will be ____.
A) zero
B) less than the current on the phase conductors
C) the same as the current on the phase conductors
D) greater than the current on the phase conductors

Question

Quizplus · Accepted Answer

When all phases have equal current flow, the phasor summation of the currents is zero, which means that the neutral current will be zero. This is because the harmonics currents are equal and opposite in the three-phase system and will cancel out when summed.

A General Procedure for Dealing with Harmonics Is as Follows