In a balanced A-Y circuit, Vab = 240/15° and Zy (12 + j15) N. %3D Calculate the line currents. Answer: 7.21/- 66.34°, 7.21/– 186.34°, 7.21/53.66° A.
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- Desian aproblem for wye delta transform adions Determinc the eauivalend resistance between the terminals A andA B.For the series circuits of the figure below, calculate the total impedance (ZT). R1 4 k2 XL1=4 k2 ZT Xei= 6 k2 Xc2= 3 k2 XL2= 4 k2 Z7= 17.4 kn, the angle is 76.7° Ob. Z7= 17.4 kn, the angle is 56.3° .Oc. Z7= 4.1 kn the angle is -14° Od. Z7= 7.2 kn the angle is 56.3°Problem 10 – Transformation [6] A delta and star configuration shown in Figure 7. Transform the delta connection are to a star and determine the values impedances: (a) ZA (b) ZB (c) Zc of the following Z CAS zZAB wi B Impedance in polar notation. 2 BC Figure 7 ZAB = 27.3L0° Q ZBc = 27.3L-30° Q ZCA = 27.3L 30° Q
- Use the information below to answer questions 24 und 25. The voltage across and the current through a load are (10+ j5Y and (2-jiArespecively. 24. What is the reactive power in VArconsumed? D. 0 A. 15 C. 20 D. 25 25. What is the pawer factor of the load? A. 0.8 leading B. 0.8 Jagging. -D. 0.6 ligging C 0.6 leading%23 IoA 1172 IAB wwww IBC 20L-90°y -J992 204 30°y A ICA IcC a) Find the load current ICA ? b) Give the line yoltoge Vab? C Calculate the total complex power over the saurces of the voltoge7 wwwfa 5ott2/U_44044 nine slot Per Phase N Y00 tubns/Phase Z00 KUA Coit Pitch 2slot atternat Toad find Alsuheh fosk fale V when SI Gloscel Vwhen stofen
- Sine wave A has a positive-going zero crossing at 40°. Sine wave B has a positive-going zero crossing at 45°. Determine the phase angle between the two signals. What signal leads ? A Y-connected system can have wires. The (resultant) voltage between the hot legs (135V) is The phase angle between the phase voltage and the line voltage of a A-connected generator is degrees. The phase current produced by a certain 20V, Y-connected generator is 12A. The corresponding line current is A certain A-connected generator produces phase voltages of 30V. The magnitude of the line voltages are When the turns ratio of a transformer is 20 and the primary ac voltage is 6V, the secondary voltage is If 20W of power are applied to the primary of an ideal transformer with a turns ratio of 8, the power delivered to the secondary load is The turns required to match a 500 source to a 1000 load isQ5) An alternaling curent vaying an with ea value '1ÓA . uns tanthneous Sinusoidaly Ams Wsuite the equal en o value cand 4find its vdlue fuqueney 50Hzl has after parsing through (@) positive morimilm value (b) O:0075 sec of tu passing through zeo wand uincreasihg hegatively . 0.0025 secFor the circuit of the following figure, if R=14Q, Zc=-J26 Q, and ZL=J10 (Q, find the value of the current through ZL. Zc V1 1.5 /24° V ZL -) 3-41° V Oa. 173.759 L -81.69 ° mA Ob. 175.759L-71.69 ° mA Oc. 175.759L-81.69 ° mA Od. 173.759 L -71.69 ° mA
- I PERFORm THE FOLLOWING OPERATIONS. (EXPRESS THE ANSWERS IN RECTANGULAR PORM, & Stow THE COMPLET SOLUTIONS). a) (4+j3) C6-je). (34j3) -(2+j3) c) (6 /20°.) (201-46")sjs) 2 30° 2. 860 140 Q LO) +J00 tj400) 3tj9.H.W Show the voltage waveforms across each half of the secondary winding and across RL. • Find the average value of the full-wave rectified voltage in Figure. ● 120 Vrms elller 4:1 D₁ WI RL 1.0 ΚΩA 220 Ω resistor is in series with an 80 mH inductor. The AC source is 48 at 1 kHz. The power factor is ________. Hint: Draw the circuit and get Vs and Is