Three loads are connected in parallel across a 1400 V rms, 60 Hz single phase supply as shown in Figure 1. Load 1: Inductive load, 150 kVA at 0.4 power factor. Load 2: capacitive load, 10 kW and 30 kVAr. Load 3: Resistive load of 20 kW. 1. Find the total kW, kVar, KVA, and the supply power factor. 2. A capacitor of negligible resistance is connected in parallel with the above loads to improve the power factor to 0.85 lagging. Determine the kVar rating of this capacitor and the capacitance in µF. 3. Comment the reduction of the supply current. 1400 V + N Z₁ Figure 1. Z₂ Z3

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.