Choose the correct answer: Capacitors in AC circuits dissipate power in the form of heat Select one: O True O False Choose the correct answer: In a balanced three-phase system, phase shift between phase and line voltage is 30". Select one: O True O False What is the phase shift between a phase current and its voltage in a three-phase balanced system? O a. 90 Ob. It can be anything, it depends on system parameters. O C. 120 Od 30°

Choose the correct answer: Capacitors in AC circuits dissipate power in the form of heat Select one: O True O False Choose the correct answer: In a balanced three-phase system, phase shift between phase and line voltage is 30". Select one: O True O False What is the phase shift between a phase current and its voltage in a three-phase balanced system? O a. 90 Ob. It can be anything, it depends on system parameters. O C. 120 Od 30°

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

Give your background about the AC systems from single phase and three phase systems to their connections including their currents and voltages laws with the suitable diagrams.
If a A-connected load has a balanced impedance ZA 94 - 17° 2 and a voltage = = / VBC = 265 82° V rms, what is the magnitude of the current Ia (in A rms)? C V cn Van a Answer: n Von b Ia Ib 20 B IAB IBC ZA ZA ICA C
In an installation there is a three-phase load of 300 kVA with a power factor of 0.8 behind, in parallel with a three-phase load of 150 kVA with a power factor of 0.6 ahead. A pure reactive element is connected in parallel, and a unity power factor is obtained at the power input. Indicate the reactant of the element, with a positive sign if it is a bank of reactors, or with a negative sign if it is a bank of capacitors. Just put the corresponding sign followed by the numerical value, without units. The numerical value must correspond to the three-phase kVARS. You can use integer values with no decimal places or up to two decimal places
3.n Figure 3P.2 shows two capacitor banks, C, and C2, in a substation C is enercized, but C, is discharged. The three-phase, 60 Hz ratings of the banks are: C,, 5 MVA; C,, 3 MVA, on a 13.8 kV base. The source has a short circuit rating of 20 kA rms at 13.8 kV. The inductance of the loop between C, and C,, represented by L, is 30 µH. 13.8 kV V3 L L2 o to C2 Source Capacitor banks ouG OL 19 Fig. 3P.2. Calculate the peak transient voltage that will appear on C, and the peak transient current that will flow in L,, if the switch S is closed at the peak of the voltage cycle. Point out any assumptions you make.
The figure shows a 3-phase bala Time left 1:06:30 200 /00 Vrms. sequence electrical system. Vcn Vbn %3D al Balanced (-) sequence 100 so a 2000 Vms Select one: O a. 200 /-120 Vrms O b. 200 v2 /0 Vrms O C. 200 /0 Vrms O d. 200 v2/-120 Vrms e. 200/120 Vrms
Q3. For the circuit shown below, sketch the current waveforms iş and io and determine the Average and RMS for both currents. i, 1:1 ɑi = 15° Vs = 220 V az = 250° ot i. 302 VR ot 2n
Two relays each with 20-ohm resistance and 0.16-henry inductance are connected in series. What is the equivalent impedance?a. 20 + j102.2 ohms c. 20 + j95.32 ohmsb. 20 + j120.63 ohms d. 10 + j25.32 ohms
Describe the concept of three-phase power in electrical systems and its significance in power distribution.
A 25 kVA, 240 V single phase source supply the rated power at the rated voltage to a motor at 0.8 power factor lagging. Find the capacitor bank in order to improve the power factor to 0.9 lagging. connected to a motor. a. Calculate the real power, reactive power and current before capacitor bank is connected? P= Q= b. Calculate the power and reactive power after capacitor bank is connected? P = c. What is kVA rating of capacitor bank Qc?
Khalid Abdulrahman Abdullah Alqasmi KA 05 Symm... 9 Search 8 Share O Comments Transitions Animations Slide Show Review View Help 1. A 3- phase, 30 MVA, 33 KV alternator has internal reactance of 4% and negligible resistance. Find the external reactance per phase to be connected in series with the alternator so that steady current on short circuit does not exceed 10 times the full load. Also find Find the full load current. d notes
Consider a 10 kVA, 200/400 V, 50 HZ: single-phase tranformer has the folloving test results:0.C. test: 200 V, 0.6A, 63 W (L.V.side)S.C. test : 20 V, 25A, 85 W (H.V. side)Deternine:i- The eficiengy at 75 % offiull-load at 0.9 leading power factor.ii -The secondary terminal voltage on fill-load at tunity power facton