where X is the phasor representation of the fundamental frequency component of waveform with
samples xk. In determining the phasors of currents in this fashion, it should be remembered that
the DC offset (if any is present) in the current must be removed prior to the phasor calculation.
When phasors from simultaneously taken samples of several inputs are determined, the resulting
phasors are on a common reference, and may be used for fault location calculations