A three phase star-connected load is drawing power at a voltage of 0.9 pu and 0.8 power factor lagging. The three phase base power and base current are 100 MVA and 437.38.A respectively. The line-to-line load voltage in kV is
Q: 0.038 +/0.072 f/phase. Calculate the line-to-line source volt- age magnitude required so that the…
A: For Star connection, Line voltage, VL = 3 * Phase voltage, VPh Line current, IL = Phase current,…
Q: The sending-end and receiving-end voltages of a three-phase transmission line at a 200 MW load are…
A: According to the question we have to find the value of the maximum steady-state power that can be…
Q: In a three phase overhead system , each line is suspended by a string of three insulator. The…
A:
Q: A single phase transmission line is delivering 500 kVA load at 2 kV. Its resistance is 0-2 0 and…
A:
Q: Two wattmeter's are connected to measur the input power of a balanced three phase load by two…
A: Watt-merter reading W1 = 8800w W2 = 3500 W
Q: Note: It is expected from student to develop impedance matrices of three phase power system. Develop…
A: From the given power system network Impedance matrix is develop as shown below
Q: A short line having an impedance of (2 + j3) ohm interconnects two power stations A and B both…
A: Without booster, We can draw the power plant as PR=25MWQR=PRtancos-10.8QR=25tancos-10.8…
Q: 0.038 +0.072 f/phase. Calculate the line-to-line source volt- age magnitude required so that the…
A: In star connection, Line voltage, VL = 3 * Phase voltage, VPh Line current, IL = Phase current, IPh…
Q: A 3-phase 11kv generator feeds power to upf load of 100mw through 3-phase transmission line. The…
A:
Q: The resistance and reactance of the single- phase 60HZ transmission line conductors are 7.2 ohm and…
A:
Q: In a balanced system, the phasor sum of the line-to-line voltages and the phasor sum of the…
A: In three phase balanced system each phase is displaced by 120 degrees each other. In case of…
Q: For a single phase network shown in the figure below, work in per-unit with 200 VA & 250 V as base…
A: In this question we need to find a load current of the given system.
Q: Two wattmeter’s are connected to measure the input power of a balanced three phase load by two…
A: For this problem we can easily found power factor. As wattmeter is connected with reverse switch we…
Q: The RL (Resistive and Inductive) Load in the Load Side Section of the Distribution Line Simulator is…
A: This question is based on the load connection in the distribution line simulator. RL load in the…
Q: A load of 135 MW at a power factor of 0.65 lagging can be delivered by a 3-phase transmission line.…
A:
Q: Answer the question in the below image. A single phase transmission line is delivering 500 kVA load…
A:
Q: An overhead 3-phase transmission line delivers 5000 kW at 22 kV at 36.86" lagging. The resistance…
A: 
Q: A load of 125 MW at a power factor of 0.6 lagging can be delivered by a 3-phase transmission line.…
A: single phase power=3 phase power 3. per phase voltage=Line voltage3. line current=power…
Q: Example 60 MVA, 13.8 kV a balance three phase load with 0.8 lagging power factor. Determine for the…
A:
Q: A single phase transmission line is delivering 450 kVA load at 12 kV. Its resistance is 4.5 and…
A: As per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost other…
Q: . Calculate the line currents for phase a, b and c. 2. Calculate the line-to-neutral voltages at the…
A: From the given circuit Van = 120 ∠0 V V bn = 120∠-120 V V cn = 120 ∠-240 V R a=R b=R c=…
Q: A single phase transmission line is delivering 440 kVA load at 11 kV. Its resistance is 50 and…
A: Sending end voltage =receiving end voltage +drop in the line. Efficiency = output power/input power.…
Q: A single phase transmission line is delivering 440 kVA load at 11 kV. Its resistance is 50 and…
A: As per Bartleby guidelines we are allowed to solve only three subparts, please ask the rest again.
Q: In 3 phase 11kVV generator having unity power factor of 100MW load and the sending and receiving end…
A: The diagram for the sending and receiving end is shown below:
Q: A 12500 kVA load is supplied at a power factor of 0·8 lagging by a 3-phase transmission line whose…
A: Draw the circuit diagram containing load transmission line with the given parameter, To…
Q: Two wattmeter’s are connected to measure the input power of a balanced three phase load by two…
A: As one of wattmeter is connected with reverse switch so it will reading negative power.
Q: Determine the per unit impedance of a transmission line having an impedance of 30 + j110 Ω on 100…
A:
Q: Draw an impedance diagram for the electric power system shown in the figure attached, showing all…
A: We can obtain the impedance diagram by using below steps: -The base voltage VBG1 on the LV side of…
Q: A load of 120 MW at a power factor of 0.8 lagging can be delivered by a 3-phase transmission line.…
A: Solution:- Given, PL-3ϕ =120 MW PL-1ϕ = 40 MW Pf = 0.8 lagging VR-1ϕ = 45 × 1033= 25.9807 KV Single…
Q: A 3-phase balanced load draws a line current of 80Amperes at 240V line to line and a 0.820 lagging…
A:
Q: A single phase transmission line is delivering 430 kVA load at 13 kV. Its resistance is 4.5 Q and…
A: According to question: a) The current through the transmission line is calculated as…
Q: Referring to the circuit shown below, determine the following: (a) The voltage between points e and…
A: Calculation of voltage and power factor of above circuit.
Q: Two Alternators are operating in parallel supplying a common load of 4250KW at 85% power factor…
A:
Q: A load of 140 MW at a power factor of 0.6 lagging can be delivered by a 3-phase transmission line.…
A: Given 3-phase transmission line Load PL=140 MWPower factor PF=0.6 lagReceiving end voltage VR=36…
Q: 5. Assume that a 2.5-kV 1-phase circuit feeds a load of 450 kW at a lagging load power factor and…
A: consider the given question;
Q: The scheduled power at the bus of a power system is the Difference of the Generation and load power…
A: A bus in a power system is defined as the vertical line at which the several components of the power…
Q: A power station has to meet the following load demand: LOAD A 50kW Between 10 AM and 6 PM LOAD B…
A: The solution can be achieved as follows.
Q: Assume that a 2.5-kV 1-phase circuit feeds a load of 450 kW at a lagging load power factor load…
A: IL=215 a, PL=450Kw VL=2.5 kv(i) load apparent power sL=VLIL =2.5K×215 =537.5…
Q: ) Calculate the phase voltages of the following zero, positive, and negative sequences of phase "a"…
A:
Q: A short 3-φ transmission line with an impedance of (5 + j 20) Ω per phase has sending end and…
A: Resistance of each conductor R=5 ohm Reactance of each conductor XL=20ohm Load power factor is 0.8…
Q: The sensitivity of a node to real power changes is 100 MW/kV of line voltage and that to reactive…
A:
Q: A set of balanced three-phase transmission lines with line-to-line voltages of 13 kV is connected to…
A: Given: For balanced 3-phase star-connected load, per-phase impedance Z=8+3j Ω=8.544∠20.55° Ω,…
Q: A three-phase 440-V, 50-kW, 60-kVA inductive load operates at 60 Hz and is wye-connected. It is…
A: Active power to motor before and after the power factor correction is ramains same. Capacitor can…
Q: Two wattmeter's are connected to measure the input power of a balanced three phase load by two…
A: i have explained in detail
Q: A load of 120 MW at a power factor of 0.6 lagging can be delivered by a 3-phase transmission line.…
A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…
Q: A short single phase transmission line has a loop impedance of (0.2+j1.2) ohm. At what leading power…
A: Given: A short single phase transmission line has, Loop impedance, Z=0.2+j1.2 Ω so Resistance, R =…
Q: In a three-phase balanced star connected system, the phase relation between the line voltages and…
A: We will draw phasor diagram of the star connected system showing phase voltages and line voltages.…
Q: A load of 145 MW at a power factor of 0.8 lagging can be delivered by a 3-phase transmission line.…
A:
Q: The three phase power and line-line ratings of the below electric power system is given below: T Vm…
A: The given system is, For generator: For motor: And
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- The p.u. impedance value of an alternator corresponding to base values of 13.2 kV and 30 MVA is 0.2 p.u. Then the p.u. impedance value of an alternator for the new base values of 13.8 kV and 50 MVA is......The circuit shows an unbalanced electrical installation powered by a positive sequence symmetrical three-phase network of 380 V compound voltage. The loads are single phase. Load 1 absorbs an active power of 950 W with f.d.p. 0.5 inductive. Load 2 absorbs an active power of 1,140 W with f.d.p. Unit. Load 3 absorbs from the network an active power of 760 W with f.d.p. 0.5 capacitive. Taking the network voltage URN as the phase reference, calculate: a) complex expressions of the line currents IR. Is. and ITThe circuit shows an unbalanced electrical installation powered by a positive sequence symmetrical three- phase network of 380 V compound voltage. The loads are single phase. Load 1 absorbs an active power of 950 W with f.d.p. 0.5 inductive. Load 2 absorbs an active power of 1,140 W with f.d.p. Unit. Load 3 absorbs from the network an active power of 760 W with f.d.p. 0.5 capacitive. Taking the network voltage URN as the phase reference, calculate: a) complex expressions of the line currents IR. Is. and IT RO- SO TO IR Is IT U₁-380 V CARGA 1 P₁ =950 W cos p1=0,5 ind. CARGA 2 P₂=1.140 W cos p₂=1 CARGA 3 P3=760 W cos p3=0,5 cap.
- A parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R = 10 ohms, L = 20mH and frequency of 1000rad / s, the current measured is 2.2361A at 89.44 leading power factor. A) Determine the initial capacitance. B) However, a fault occurs on the capacitor branch making its capacitance 20% lower and a resistance of 5 ohms is detected. If this faulty circuit is rerun but at a frequency of 500 rad / s, determine the new current that will flow through the circuit.128, An equipment has an impedance 0.9 p.u. to a base of 20 MVA, 33 kV. To the base of 50 MVA, 11 kV, the p.u. impedance will be (a) 4.7 (c) 0.9 (b) 20.25 (d) 6.75write all possible KCL and KVL equations. simplify all and in ascending order, with contsant at the right side of the equation.
- A Load of particular kVA is drawing a current which lags behind the voltage at an angle of 63.43 degrees. The operating power factor is __________ . a. 0.5958 b. 0.6122 c. 0.6511 d. 0.4472Transkrmers phase with each bank with - adjuste 35. Three single-phase transformers, cach of 100 kVA rating, are conected in a closed-delta arrangement. If one of them is taken out, it would be possible to load the bank in such a manner that cach one is loaded to the extent of: A 86.6 kVA C. 57.7KVA B. 66.7 kVA D. 33.33 kVA when load is at unity power factor. 36. Average power factor at which V-V bank separate is A 86.6% C. 66.67% В. 73.3% D. None of these 37. Scott connections are used for: A. single-phase to three-phase transformation C. three-phase to two-phase transformation B. three-phase to single-phase transformation (D Any of the above 38. The current in low voltage winding of a 25 kVA, 6600/400 V, 50 Hz, 3-phase Y-A transformer, at full load is: A 36 A Č. 65,32 A B. 20.78 A D. 40.2 A 39. The current in high voltage winding of a 20 kVA, 2200/220 V, 50 Hz, 3-phase A-A transformer, at full load is: (A. 3.03 A C. jo.5 A B. 5.25 A D. None of above 40. The current in low voltage…7. Two 440V, 60Hz, 6 pole, 30 AC generators are running in parallel. The first supplies the busbars with 525kW of power at a power factor of 0.79 lagging. The second provides the busbars with 415kW at a power factor of 0.96 lagging. An additional load that requires 275kW at a power factor of 0.89 leading is added to the busbars. The two generators have their governor and magnetization controls adjusted so they provide 440V, 60Hz and share the active and reactive powers equally. What is the active and reactive power produced by each and their line currents and speeds?
- X₂=0.1 1 XL +03 Soto X₁ = 0.2 X = 0.1 X = 0.1 Above is the one-line diagram of a simple power system. Each generator is represented by an emf behind the subtransient reactance. All impedances are expressed in per unit on a common base. All resistances and shunt capacitance are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A symmetrical fault occurs at bus 1 through a fault impedance Z, =j0.08 per unit. a) Using Thevenin's Theorem, determine the impedance to the point of fault and the fault current in per unit. b) Find the bus voltages and line currents during the fault. 2 O otoThe reactance of a generator is given as 0.1 pu based on the generator of 17 KV, 300 MVA. Determine the pu reactance on a base of 17 KV, 250 MVA. New pu reactance is.......Two impedances consist of resistance of (15 ohms and series connectedinductance of 0.04 henry) and (resistance of 10 ohms, inductance of 0.1 henryand a capacitance of 100 microfarad, all in series) are connected in series andare connected to 230 volts, 50 – Hz AC source. Find: (a) current drawn, (b) voltageacross each impedance, (c) individual and total power factor. Draw the phasordiagram.