3-phase Δ (delta) • cos φ = 0.70 (lag)
φ (phase angle)—
Apparent power S—
Real power P = S·cosφ—
Reactive power Q = S·sinφ—
Δ system shown as line-to-line voltages V
AB, V
BC, V
CA (120° apart). Current lags voltage by φ where cos φ = 0.7.
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