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The transformer of Problem 3.16 is supplying a rated load of 50 kVA at a rated secondary voltage of 240 V and at 0.8 posr factor lagging. Neglect the transformer exciting current. (a) Determine the input terminal voltage of the transformer on the high-voltage side. (b) Sketch the corresponding phasor diagram. (c) If the transformer is used as a step-down transformer at the load end of a feeder whose impedance is
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MindTap Engineering for Glover/Overbye/Sarma's Power System Analysis and Design, 6th Edition, [Instant Access], 1 term (6 months)
- solve for the capacitor (Filter) values of the Half-wave Design a half-wave rectifier with a filter for the following conditions: a) The peak input voltage is 10 V. Input frequency is 60 Hz. b)Use virtual diode (VON = 0.7 V). c)The minimum output voltage should be at least 90% of the maximum output voltage. d)The load resistance may vary from 1.5 k ohm to 2.5 k ohm. Instructions: ~ Vomax = 10 - 0.7 = 9.3 V; Vomin = 0.9xVomax; angleV = Vomax- Vomin~ fin =60Hz; fp =60Hz.~ Use the smallest value of load resistance (1.5 k ohm) to calculate the capacitor value.~ Use the above calculated capacitor value (same value) to build 2 circuits (half-waverectifier with a filter), with load resistance of 1.5 kohm and 2.5 kohm, respectively.~ Note: The same capacitor value is applied to the load resistance of 1.5 kohm and 2.5 kohm,respectively.arrow_forward1. Determine the frequency of oscillation of a three-stage phase shift ladder network oscillator based on the following combinations of capacitance and resistance: a) C = 10 nF and R 24 kn. b) C = 50 µF and R = 800 N. c) C = 0.1 nF and R = 100 kn. d) C = 470 nF and R 12 kn. e) C = 1 µF and R = 900 0. 2. A certain cascaded amplifier arrangement has the following voltage gains: Av1 = and Av4 = 6. What is the overall voltage gain? Express each gain in decibels (dB) and determine the total voltage gain in dB.. 3.5, Av2 = 27, Av3 = 13arrow_forwardWater is the working fluid in a reheat-regenerative Rankine cycle with one closed feedwater heater and one open feedwater heater. Steam enters the turbine at 1400 lbf/in.2 and 900°F and expands to 500 lbf/in.2, where some of the steam is extracted and diverted to the closed feedwater heater. Condensate exiting the closed feedwater heater as saturated liquid at 500 lbf/in.² undergoes a throttling process to 120 lbf/in.² as it passes through a trap into the open feedwater heater. The feedwater leaves the closed feedwater heater at 1400 lbf/in.2 and a temperature equal to the saturation temperature at 500 lbf/in.2 The remaining steam is reheated to 800°F before entering the second-stage turbine, where it expands to 120 lbf/in.2 Some of the steam is extracted and diverted to the open feedwater heater operating at 120 lbf/in.2 Saturated liquid exits the open feedwater heater at 120 lbf/in.² The remaining steam expands through the third-stage turbine to the condenser pressure of 2 lbf/in.2…arrow_forward
- Problem (1) For the circuit shown in fig. find the current supplied by the battery by using delta/star transformation 400 www 2002 500 30 V 2002 www 30Ω www 5Ω wwarrow_forwardExample Question 1 A dynamometer-type AC ammeter made of moving coils and fixed coils with a shunt is used to measure current. The ammeter is designed to let 95% of the input curent flow through the shunt resistor. The moving coil's resistance is 10 2, and the shunt resistance is 0.004 2. The Table Q1 below gives the relation between the deflection and the mutual inductance of the ammeter. Table Q1 Deflection 2.44 (radian) (full- scale) 0.26 0.52 1.05 1.57 1.83 2.09 Mutual Inductance -325 -260 -180 180 263 325 373 (µH) If the input current that gives the full-scale deflection is = 6.7A, determine the following: (i) (ii) (iii) the current passing through the moving coil at full-scale deflection, the deflecting torque that gives full-scale deflection, the current passing through the fixed coil at half-scale deflection. (Hint: Plot the Mutual Inductance vs. Deflection graph based on the table above. Then, use the graph to solve parts (ii) and (iii))arrow_forwardA 30-volt electromotive force is applied to an LR series circuit in which the inductance is 0.1 henry and the resistance is 50 ohoms. Determine the current i(t) if i(0) = 0.arrow_forward
- 5. In an RL circuit with a resistance of 175 Q and an inductor that has an inductive reactance value of 100 Q. Calculate the impedance and inductance of the circuit also draw the circuit diagram. Act Go tarrow_forward19. For the network of Fig. 6.82 D, find: a. The voltage V. b. The current /2. c. The current I,. d. The power to the 12 kQ resistor. 12 kΩ 18 kN 48 V Is + v - 3 kN 12arrow_forwardDesign a wide flange W column 8 m in height to support an axial dead load of 1000 kN and a live load of 1200kN in the interior of a building. The column base is rigidly fixed to the footing and the top of the column isrigidly framed to very stiff girders. Assume that bracing is provided to prevent side sway in the weak axis/planeof the column (you don’t have to consider slenderness in this direction), but side sway is not prevented aroundits strong axis. Select an economical W shape.arrow_forward
- Example (2): Design an Ayrton shunt by indirect method to provide an ammeter with current ranges 1A, 5A, and 10A, if PMMC meter have internal resistance of 5002 and full scale current of 1mA.arrow_forward(d) Consider a synchronous circuit with a critical path consisting of 10 logic gates, and for which the minimum logic gate delay guaranteeing a stable output is 5 milliseconds. What is the maximum clock frequency for this circuit? Justify your answer by explaining the purpose of the clock in a synchronous circuit. Provide an explanation of how you determined a suitable clock frequency for the circuit.arrow_forward1. Connect the zener diode test circuit shown in Fig.7. Increase the input voltage gradually in several steps from 0 to 15V, and record Vz and Iz according to Table 1. Rs mA 330 2, Iz 2W Vin BZX55C5V1 Vz 5.1V Zener 0- 15V PZM = 500 mW Figure 7: Practical Circuit Used to Obtain the Characteristics of the Zener Diode - 30 - Еxperiment 4 The Zener Diode Table 1: Recorded Data for the Circuit of Figure 7 Vin(V) Vz(V) Iz(mA) 1 2 3 4 4.5 5.5 6 7 8. 10 12 14 15arrow_forward
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