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
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
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:Question 1
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 uF.
Comment the reduction of the supply current.
3.
1400 V
+
Z₁
Figure 1.
Z₂
Z3
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