Three balance Y-connected loads are installed on a balanced three-phase four-wire system. Load 1 draws a total of 5 kW at unity power factor, load 2 takes 10 kVA at PF= 0.90 lagging, and load 3 absorbing 7 kW at 0.80 lagging. Phase voltage ate the load ends is 130 V, if the line has a resistance of 0.1 0, and if the neutral has resistance of 1 Q, Calculate: (a) The power factor at which the source is operating. (b) The combined PF of the loads. (c) The total power lost in four lines. (d) The phase voltage at the source. (e) The total power drawn by the loads.
Three balance Y-connected loads are installed on a balanced three-phase four-wire system. Load 1 draws a total of 5 kW at unity power factor, load 2 takes 10 kVA at PF= 0.90 lagging, and load 3 absorbing 7 kW at 0.80 lagging. Phase voltage ate the load ends is 130 V, if the line has a resistance of 0.1 0, and if the neutral has resistance of 1 Q, Calculate: (a) The power factor at which the source is operating. (b) The combined PF of the loads. (c) The total power lost in four lines. (d) The phase voltage at the source. (e) The total power drawn by the loads.
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:Three balance Y-connected loads are installed on a balanced three-phase four-wire
system. Load 1 draws a total of 5 kW at unity power factor, load 2 takes 10 kVA at
PF= 0.90 lagging, and load 3 absorbing 7 kW at 0.80 lagging.
Phase voltage ate the load ends is 130 V, if the line has a resistance of 0.1 Q, and if
the neutral has resistance of 1 Q, Calculate:
(a) The power factor at which the source is operating.
(b) The combined PF of the loads.
(c) The total power lost in four lines.
(d) The phase voltage at the source.
(e) The total power drawn by the loads.
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