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**Unformatted text preview: **Irwin, Basic Engineering Circuit Analysis, 11/E 1 9.94 Given the network in Fig P9 9.4, compute the input soume voltage and the input power factor. so kW
0. 5r? pf 0.03:1 1m“ 0.010 I'D-05“ SOLUTION:
1"; = if" M = 113.6M__-36.37° A... 9:12;.(001149'005) +290¢£Qf= alaggSSZQLZ-ﬁo Mn“ —--————_—_—~_.—______
Chapter 09: Steady - State Power Analysis Problem 9.94 lnNin, Basic Engineering Circu'rt Analysis, 11/E 9.103 The load in the network in Fig. P9.103 is located in New York. It consumss 64 kw at 0.68 pf lagging. Find the value of
the capacitor mat when placed in paiallel with the load will mime the power factor to 0.92 lagging. Flgure P9. 103 SOLUTION: ——_—.——___—__
Chapter 09: Steady - State Power Analysis Problem 9.103 lnvin. Basic Engineering Circuit Analysis, 11/E 1 1 W .3 For a balanced three-phase wye—wye connection with ZY = SOQO“ 0., determine the phase voltages. line
voltages, line currents, and phase currents if V M 2 120M V. Assume a positive phase sequence. SOLUTION: —-———-—_——__—__
Chapter 11: Polyphase Circuits Problem 11.3 Irwin, Basic Engineering Circuit Analysis. 11/E 1 1.12 A positive-sequence balanced twee—phase wye—connected source supplies power to a balanced wye-cunnected
load. The magnitude of the line voltages is 208 V rms. If the load impedance per phase is 36 + j12 9.,
determine the line currents if ﬂu = 0°. SOLUTION: \an- 3133119“ = 120.0912" M” m i.— : 1 45.439 in
L4 = 35‘2112 ESL—— 74m: 3. Mtg-13a it?" Am: 31551015 7: Am; \H’
I,1»! ea
Ii n ii
11 ————____—,______
Chapter 11: Polyphase Circuits Problem 11.12 lnw'n. Basic Engineering Circuit Analysis, 11/E 1 1 1. .27 In a balanced three-phase wye—delta system, the source has an abc phase sequence and V“ = 120(40“ V ms.
The line and load impedances are 0.5 + 10.4 0 and 24 + le .0, respectively. Find the delta currents in the load. SOLUTION: H
Chapter 11: Polyphase Circuits Problem 11.27 ...

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