Electrical plants Draw the three-phase four-wire meter connection diagram
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A: The objective of this question is to find the voltage drop across resistor R3 in a series circuit.…
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- 1. What is the relationship of voltage and current (concerning phase angle) in a pure resistive circuit?Power engineering book MehtaQ3/A/ The equivalent circuit impedances of a 20-kVA, 8000/240 V, 60-Hz transformer are to be determined. The open-circuit test was performed on the secondary side of the transformer and the short circuit test was performed on the primary side of the transformer .The following data was taken: Open-circuit Short-circuit test test (on secondary) Voc 240 v (on primary) Vsc 489 v Isc 2.5 A Psc 240 W loc 7.133 A Poc 400 W
- How does the Zenerimpedance affect the voltage across the terminals of the device?Three 20-kVA, 24000/277-V distribution transformers are connected in A-Y. The open-circuit test was performed on the low voltage side of this transformer bank, and the following data were recorded: Viine, OC = 480 V ljine, OC = 4.1 A P3p, Oc = 945 W The open-circuit test was performed on the low voltage side of this transformer bank, and the following data were recorded: Viine, sc = 1400 V line, SC = 1.8 A P39. SC = 912 W What is the magnetization reactance of this transformer, XM, in pu?Q3- a- Calculate the percentage of winding protected for a three phase/ 20 kV alternator against e impedance earth faults, if the relay operates when the out of balance current in the pilot wi reaches 0.15A. Assume CT ratio = 900/5 A and R earthing = 6 2. %3D %3D
- Solve and show complete solutions. Choose only from the choicesRefer to Figure 8-31 to answer the following questions. Assume that a line voltage of 12,470volts is connected to the primary of the transformer and the line voltage of the secondary is 480volts. What is the turns ratio of the transformer? Assume the load has an impedance of 6Vper phase. What is the secondary line current? How much current is flowing in the secondary winding? How much current is flowing in the primary winding? What is the line current of the primary?Vdc0 U=12 V Circuit #1 Ried V LED www Ried_series 0.05 Vdc0 U = 12 V 0,04 Circuit 0.03 0.02 0.01 RED LED GREEN LE Set current to 10 mA LED voltages Given the circuit #1 presented above, answer the following questions: BLUE_LEC Red 0.5 1) Determine the value of the V₁ (voltage forward of the LED) for the LEDS RED, VDRED GREEN, VREEN and BLUE, VOBLUES when the current through the LEDs is 10mA, 2) Is the LED in Circuit #1, connected in the way that will be lighting up or not - Justify your answer Green 3) Calculate the value of the resistance Rled in Circuit #1, to ensure that a RED LED will have a current of 10 mA 1.5 2 25 Voltage across LED (V) 4) Calculate the value of the resistance Rled in Circuit #1, to ensure that a GREEN LED will have a current of 10 mA Blue 5) Calculate the value of the resistance Rled in Circuit #1, to ensure that a Blue LED will have a current of 10 mA 6) Given three LEDs, connected in series as shown in the Circui # 2 (below), calculate the value of the…
- What are two main types of three-phase connectionsProblem 1 - Series en Parallel AC networks [19] Look at the circuit in Figure 1 and determine the following: (a) Total Admittance. (b) Total Impedance. (c) Total Current (l:). (d) Current (I1) through impedance Z2. (e) Current (12) through impedance Z3. (f) Current (I3) through impedance Z4. (g) Is this an inductive or capacitive circuit? A. B Zs 220V;50HZ Figure 1 (h) Voltage across Z1. (i) Voltage across A and B. G) Voltage across Zs. Z1 = 3 + j5 ohm Z2 = 10 + jo ohm Z3 = 5 + j15 ohm Z4 = 10 – j30 ohm Zs = 20 – j30 ohm Admittance and Impedance in rectangular notation. All currents and voltage in polar notation. Take voltage as reference.Discuss causes of insulation failures in high voltage engineering. High voltage engineering
