Question

21(25 PTS) A 400-V DB supplies the following loads: L$_1$: 8 kVAR at 0.8 lag (TPN) L$_2$: 5 kVA at 0.85 lag (SPN) connected to Y-phase L$_3$: 30 kW at 0.90 lag (TPN) Calculate: (a) Design current for each load. (b) Design current of the main supply cable. (c) Apparent power and PF observed from the supply side.

          21(25 PTS)
A 400-V DB supplies the following loads:
L$_1$: 8 kVAR at 0.8 lag (TPN)
L$_2$: 5 kVA at 0.85 lag (SPN) connected to Y-phase
L$_3$: 30 kW at 0.90 lag (TPN)
Calculate: (a) Design current for each load.
(b) Design current of the main supply cable.
(c) Apparent power and PF observed from the supply side.

21(25 PTS)
A 400-V DB supplies the following loads:
L1: 8 kVAR at 0.8 lag (TPN)
L2: 5 kVA at 0.85 lag (SPN) connected to Y-phase
L3: 30 kW at 0.90 lag (TPN)
Calculate: (a) Design current for each load.
(b) Design current of the main supply cable.
(c) Apparent power and PF observed from the supply side.

Added by Ashley T.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Adi S

06/28/2023

Step 1

For load L1: Apparent power, S = 8 kVA Voltage, V = 400 V Design current, I = S / V I = 8000 / 400 I = 20 A For load L2: Apparent power, S = 5 kVA Voltage, V = 400 V Design current, I = S / V I = 5000 / 400 I = 12.5 A For load L3: Active power, P = 30 kW Power Show more…

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PTS) A 400-V DB supplies the following loads: L_(1): 8kVAR at 0.8 lag (TPN) L_(2): 5kVA at 0.85 lag (SPN) connected to Y-phase L_(3): 30kW at 0.90 lag (TPN) Calculate: (a) Design current for each load. (b) Design current of the main supply cable. (c) Apparent power and PF observed from the supply side. Q1 (25PTS) A 400-V DB supplies the following loads: L8kVAR at 0.8 lag TPN L5 kVA at 0.85 lag SPN connected to Y-phase L30 kW at 0.90 lag TPN Calculate: a) Design current for each load (b) Design current of the main supply cable c) Apparent power and PF observed from the supply side