Electrical Engineering ⇒ Topic : Unbalanced delta Connected Load

Unbalanced Δ-Connected Load

Fig. (a) shown an unbalanced Δ-load connected to a balanced 3-phase supply. It is clear that line voltage of the supply appears across each load phase. The current in each load phase is equal to the line voltage divided by the impedance of that phase.The line current will be the phasor difference of the corresponding phase currents.

Taking V_RY as the reference phasor (Phase sequence is RYB), we have,

                                                                  FIGURE (a)

The reader may note that problems on unbalanced A loads can be solved with a fair degree of ease. It is because the problem simply reduces to three independent single phase circuits supplied with equal voltages that are 120° apart in phase