ENGINEERING CIRCUIT...(LL)>CUSTOM PKG.<
9th Edition
ISBN: 9781260540666
Author: Hayt
Publisher: MCG CUSTOM
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Chapter 12, Problem 21E
(a)
To determine
The power factor of the source for the given condition.
(b)
To determine
The total power supplied by the source for the given condition.
(c)
To determine
The power factor and the total power delivered by the source for the given condition.
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Students have asked these similar questions
Three Impedances each of (12 -j18)N are connected in mesh across a three-phase 420V ac supply.
Determine the phase current, line current, active power, reactive power drawn from the supply.
phase current (Ip)
Line current
real power
reactive power
A balanced delta-connected load is supplied by a 60 Hz
3-phase source with a line voltage of 240 V. Each load
phase draws 6kW at a lagging power factor of 0.8.
Calculate:
a. The load impedance per phase
b. The line current
c. The value of the capacitance needed to be
connected in parallel with each load to minimize
the current from the source (PF=1)
Given the circuit fed by 3 phases 380V phase to phase voltage, with 50HZ.
a) Draw the power triangle of each of the loads (P, Q and S).
b) Find the total equivalent (P, Q and S).
c) Find the Value of Capacitor bank in order to have a unity power factor.
d) Find the complex power supplied by the source after adding the capacitor bank.
e) Explain why higher power factor is better for the installation
3 phases
380 v
50 Hz
Load 1
Load 1
15 KVA
25 KVA
0.75 Lagging
0.85 Lagging
Chapter 12 Solutions
ENGINEERING CIRCUIT...(LL)>CUSTOM PKG.<
Ch. 12.1 - Let and . Find (a) Vad; (b) Vbc; (c) Vcd.Ch. 12.2 - Prob. 2PCh. 12.2 - Modify Fig. 12.9 by adding a 1.5 resistance to...Ch. 12.3 - A balanced three-phase three-wire system has a...Ch. 12.3 - A balanced three-phase three-wire system has a...Ch. 12.3 - Three balanced Y-connected loads are installed on...Ch. 12.4 - Each phase of a balanced three-phase -connected...Ch. 12.4 - Prob. 8PCh. 12.5 - Determine the wattmeter reading in Fig. 12.24,...Ch. 12.5 - Prob. 10P
Ch. 12 - Prob. 1ECh. 12 - Prob. 2ECh. 12 - Prob. 3ECh. 12 - Describe what is meant by a polyphase source,...Ch. 12 - Prob. 5ECh. 12 - Prob. 6ECh. 12 - Prob. 7ECh. 12 - Prob. 8ECh. 12 - Prob. 9ECh. 12 - Prob. 10ECh. 12 - The single-phase three-wire system of Fig. 12.31...Ch. 12 - Prob. 12ECh. 12 - Referring to the balanced load represented in Fig....Ch. 12 - Prob. 14ECh. 12 - Prob. 15ECh. 12 - Consider a simple positive phase sequence,...Ch. 12 - Assume the system shown in Fig. 12.34 is balanced,...Ch. 12 - Repeat Exercise 17 with Rw = 10 , and verify your...Ch. 12 - Prob. 19ECh. 12 - Prob. 20ECh. 12 - Prob. 21ECh. 12 - Prob. 22ECh. 12 - A three-phase system is constructed from a...Ch. 12 - Prob. 24ECh. 12 - Each load in the circuit of Fig. 12.34 is composed...Ch. 12 - Prob. 26ECh. 12 - Prob. 27ECh. 12 - A three-phase load is to be powered by a...Ch. 12 - For the two situations described in Exercise 28,...Ch. 12 - Prob. 30ECh. 12 - Prob. 31ECh. 12 - Prob. 32ECh. 12 - Repeat Exercise 32 if Rw = 1 . Verify your...Ch. 12 - Prob. 34ECh. 12 - Prob. 35ECh. 12 - Prob. 36ECh. 12 - A wattmeter is connected into the circuit of Fig....Ch. 12 - Find the reading of the wattmeter connected in the...Ch. 12 - (a) Find both wattmeter readings in Fig. 12.39 if...Ch. 12 - Circuit values for Fig. 12.40 are , , , , . Find...Ch. 12 - Prob. 41ECh. 12 - Prob. 42ECh. 12 - (a) Is the load represented in Fig. 12.41...Ch. 12 - Prob. 44E
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