L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1420 rpm, line voltage 220 V and frequency 50 Hz star-connected 3-phase ASM, ignoring core (iron) losses given as follows: R1=0.21 Ohm, R2=0.18 Ohm, X1=X2=0.66 Ohm and Xm=9.9 Ohm i, i, R, R, jX m (1-s) S How many times the rated current will the inrush current be when the ASM is started directly? O 3.7473 O 1.2558 O 6.3414 O 8.0815 O 7.1534 O 2.6455 n 4.3763
Q: An AC three phase distribution system (given in Figure 2), which has end user with balanced three…
A:
Q: A three-phase, wye-connected, 7 kVA, 230 V synchronous generator has a reactance of 7 ohms per…
A:
Q: (a) A single phase, unity power factor load takes 70 A at 25 kV. Using a base voltage of 60 kV and…
A: Per unit
Q: Neglecting resistance, transformer phase shift, and magnetizing reac- tance, draw the equivalent…
A:
Q: Q5: A SL-G fault occurs on the low voltage side of a transformer that connects a motor to a…
A: Given data for generator, Given data for motor,
Q: L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1450 rpm,…
A: According to the question we have to calculate how many times the inrush current will be the rated…
Q: Problem-4: Solve at Home Problem-4, Cont... The one-line diagram of a simple three-bus power system…
A:
Q: Three-phase alternator supplying a three wires, CBA system with a line voltage of 100 Volt,…
A:
Q: Three zones of a single-phase circuit are identified in the figure with a generator voltage…
A: For the evaluation of electrical machines, one-of-a-kind values are required, consequently, per unit…
Q: Is it possible to measure the phase-shift angle in an AC single-phase circuit by an indirect method…
A: The electrical circuits have resistance, inductance and capacitance as their elements. In the…
Q: Obtain the per-unit equivalent circuit for the following one-line diagram in Figure 1. Xine = 100 Q…
A:
Q: A three phase synchronous generator with negligible resistance and Xs=20 ohm has induced voltage as…
A: Given: Per phase quantities, Induced voltage E=230 VTerminal voltage V=230 VSynchronous reactance…
Q: The total instantaneous power absorbed by a three-phase motor (under balanced steady-state…
A: Consider the instantaneous voltage across phase a and the neutral terminal is given by:
Q: Q5) A Three- phase alternator ( Synchronous Generator) SG , 12 KV , 1.5 MVA, star connected armature…
A: Voltage regulation =( (Ef-Vt)/Vt)*100 Where Ef = per phase armature induced voltage and Vt =per…
Q: (b) A 50 Hz synchronous generator with inertia constant H = 6.2 MJ/MVA is connected to an infinite…
A:
Q: For the system shown in figure, voltage V2 and angle 8, are calculated using Newton-Raphson method.…
A: It is given that:
Q: L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1450 rpm,…
A: According to the context of the given question, it is required to determine the number of times…
Q: The one-line diagram of a simple power system is shown in Figure below. The neutral of each…
A: In this question we need to find a 3 phase fault at bus 3 .
Q: Q1. The following figure shows the differential protection of power transformers with specifications…
A:
Q: (a)Determine the voltages at bus 2 and bus 3 after first iterations using Gauss Seidel. Use flat…
A:
Q: The Gauss-Seidel is an iterative method used to solve a set of nonlinear equations in the power…
A: Gauss-Seidel method is used to solve the power flow analysis question in the power system. In two…
Q: Figure below shows a power system where load at bus 5 is fed by generators at bus 1 and bus 4. The…
A: When line L1 has length =100 km, fault current for fault at bus 5 is =2530 A When line L1 reduced to…
Q: Question 1 In the power system network shown in Figurebelowbus 1 is a slack bus with Vi 1.020° per…
A: According to question we need to calculate the value of V21 , and V22.
Q: Figure below shows a power system where load at bus 5 is fed by generators at bus 1 and bus 4. The…
A:
Q: 5.5 kW, 1450 rpm. L-type equivalent circuit and parameters for a continuous sinusoidal phase of a…
A: Given: 5.5 kW, 1450 rpm, line voltage 220 V and frequency 50 Hz. R1=0.21Ω, R2=0.18Ω,…
Q: Sketch the complete per-phase equivalent circuit of a symmetrical non-salient pole three-phase…
A: Synchronous generator: It is an electromechanical device. This is called a synchronous generator…
Q: Figure below shows the one line diagram of a 3-o system. By selecting a common base of 100 MVA and…
A: There will be three sequence networks in the given power system- Positive-sequence network…
Q: (b) A 50 Hz synchronous generator with inertia constant H = 6.2 MJ/MVA is connected to an infinite…
A:
Q: Y-connected, 9. A 3-phase, circuited and operated at rated speed to produce rated current. When the…
A:
Q: The sequence component line-to-line voltages of a three-phase, 4-wire system are the following: Vab0…
A:
Q: What is a single phase voltage, current, power factor and power relationships for resistive,…
A:
Q: Question - Compare the effect of varying resistance, capacitance and inductance in a pararllel and…
A: In this question Compare the effect of varying resistance, capacitance and inductance in a…
Q: A surge of 100 kV travels along an overhead line towards its junction with a cable. The surge…
A: Given, A surge travels along an overhead line towards its junction with a cable is, V= 100 kV The…
Q: Single Phase equivalent Y-Y system is shown in the figure 3 below, operated by a generator with…
A: Single phase equivalent circuit as given in the circuit is shown below
Q: A three-phase, wye-connected, 6.25kVA, 220-synchronous generator has a reactance of 8.4 ohms per…
A:
Q: 5) Non minimum phase systems are also non causal. True False
A: Non-minimum Phase system: They are causal and stable systems whose inverse are causal but unstable.…
Q: UDng a ITIe Core in high frequency transformers. c- Discuss, different applications of iron cores of…
A: C)For magnetizing or demagnetizing a iron material, some energy is expended. The energy expended…
Q: For the power system shown at right the impedance matrix 2 is j0.5 j0.2 3 j0.4 0.145 0.120 0.0692…
A: New voltage at a bus = old bus voltage + change in voltage
Q: The one line diagram of a three phase power system is as shown in Figure 7 Impedances are marked in…
A:
Q: The effective resistance of a 2200 V, 50 Hz, 440 KVA, 1 -phase alternator is 0.5 ohm. On…
A: Synchronous impedance is the ratio of open-circuit voltage to short-circuit current Given Data: V =…
Q: A generating system contains three 20 MW generating units each with a 3% FOR and one 45 MW unit with…
A: A table for unit system capacity outage is shown below:
Q: The following figure shows the differential protection of power transformers with specifications of…
A:
Q: A star connected 3-phase 10 MVA, 6.6 kV alternator is protected by circulating current protection,…
A: In this question , we will find value of earthing resistance required if 85% of stator winding is…
Q: Is it true??
A: For the transmission of the equal power to three loads impedance will need only the half of the…
Q: In a 3-phase Overhead System, each line is suspended by a string of 3 Insulators. The voltage across…
A: Given voltage across top and middle units, using this we will find Ratio of capacitance, string…
Q: Athree-phase, wye-connected, 6.25 kVA, 220 V synchronous generatorhas a reactance of 8.4 N perphase.…
A: The given system is a three-phase Y connected, the base values are as follows: Vbase=220…
Q: In the power system network shown in Figurebelowbus 1 is a slack bus with V = 1.020° per unit and…
A: (a) Given thatV1=1.0∠0°S2=300MW+j80 MvarLine impedance,Z12=0.01+j0.02 p.u.
Q: L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1460 rpm,…
A:
Step by step
Solved in 4 steps
- A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and L=40mH. (a) Determine the power factor of the circuit and state whether it is lagging or leading. (b) Determine the real and reactive power absorbed by the load. (c) Calculate the peak magnetic energy Wint stored in the inductor by using the expression Wint=L(Irms)2 and check whether the reactive power Q=Wint is satisfied. (Note: The instantaneous magnetic energy storage fluctuates between zero and the peak energy. This energy must be sent twice each cycle to the load from the source by means of reactive power flows.)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......5.5 kW, 1450 rpm. L-type equivalent circuit and parameters for a continuous sinusoidal phase of a star connected 3-phase ASM with line voltage 220 V and frequency 50 Hz are given as follows, ignoring core (iron) losses: R1=0.21 Ohm, R2=-0.18 Ohm, X1=X2-0.66 Ohm and Xm = 9.9 Ohm How many times the inrush current will be the rated current when the ASM is started directly? Answer options group 8.0815 2.6455 4.3763 7.1534 1.2558 6.3414 5.2280 3.7473
- In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generators are connected in star with thier star points grounded. The system base is 15 MVA. The transformers all have reactances of 0.04 p.u. on this 15 MVA base. The reactances of all other elements are given in Table 1 (in 2) and the voltage levels are given in Table 2. p.u. G1 p.u. T1 jö Per-Unit Convert all values to p.u. on a 15 MVA base. Xa= p.u. Xc₂= XL = V BABE G1 2 X 9 T3 Figure 1: A section of the distribution system T1 L Table 1: Sequence reactances (2) 3 G1 L G2 0.3 0.59 0.01 4 L 9/10 10 Fault Voltage What is the voltage at bus 3 (in Volts) after the fault has occurred? Vp= V T2 5 T2 34 10/4 Table 2: Voltage bases (kV) G2 4 T3 10/9 | G2 Fault Current A three-phase fault with a fault reactance of 0.01 p.u. occurs at bus 3. Calculate the fault current flowing at the fault point in KA. Ip=-j KA SoA 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.QUESTION 1 Two magnetically-connected circuits have the following characteristics: . A series-opposing connection of coils (dot convention). The primary side is connected to a voltage source that has a magnitude of 230 V and a phase angle of 45 degrees. . The primary-side inductive reactance is jXL1 - j8 Ohm. . The secondary side is connected to a resistive load of 10 Ohm. . The secondary side inductive reactance is jXL1 =j5 Ohm. . The mutual inductive reactance is jM=j1 Ohm. The magnitude of the voltage across the resistive load is:
- L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1480 rpm, line voltage 220 V and frequency 50 Hz star-connected 3-phase ASM, ignoring core (iron) losses given as follows: R1=0.21 Ohm, R2=0.18 Ohm, X1=X2=0.66 Ohm and Xm=9.9 Ohm i, i, R, R, eee R, (1-s) m S How many times the rated current will the inrush current be when the ASM is started directly? O 6.3414 O 1.2558 5.2280 O 3.7473 O 7.1534 4.3763 O 2.6455 8.0815L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1450 rpm, line voltage 220 V and frequency 50 Hz star-connected 3-phase ASM, ignoring core (iron) losses given as follows: R1=0.21 Ohm, R2=0.18 Ohm, X1=X2=0.66 Ohm and Xm=9.9 Ohm How many times the rated current will the inrush current be when the ASM is started directly?The section bus-bars A and B are linked by a bus-bar reactor rated at 6000 kVA with 12% reactance. On bus-bar-A, there are two generators each of 10 MVA with 8% reactance and on bus-bar-B, two generators each of 6000 kVA with 10% reactance. Find the steady MVA fed into a dead short circuit all phases on B with bus-bar reactor in the circuit.
- What is the relationship between primary induced emf( E1) and applied voltage (V1) of a Transformer? O a. Both are unequal and in phase O b. Both are unequal and 180 degree out of phase O c. Both are equal and 180 degree out of phase O d. Both are equal and inphaseThe 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.......The reactance of a generator is given as 0.25 per-unit based on the generator’s of 18 kV, 500 MVA. Find its per-unit reactance on a base of 20 kV, 100 MVA. a. 0.0505 b. 0.0605 c. 0.0405 d. 0.0606