Question

Question 25
A balanced 3-phase Y-connected power supplies an office building through a
four-wire distribution. The circuit operates at 60 Hz. The voltage at the source is such that ?
is taken in
reference value and its value is 380 V in rms value and phase sequence ABC (positive). All the
distribution line conductors are of the same material and have equal cross-sections.
Considering the length of the line and the characteristics of the electrical cables, the impedances
neutral conductors and the phase conductors are equal to 0.01 Ω with reactances negligible at 60
Hz. The Y-balanced balanced load corresponds per phase to a resistance of 1.45 Ω in series with a
inductance of 2.65 ??. Determine: a) the currents in the lines; b) the voltage in the phase of the Y-bonded load;
c) the active power required by the load; d) the reactive power required by the load; e) the power
dissipated in the line; f) the reactive power of the capacitors connected in Y to correct the
load power for 0.92 inductive; g) the power dissipated in the line, considering the correction of the PF.

Answer 1