Single-phase motors are more efficient than three-phase motors for the same rate сарacity. Select one: O True O False The voltage V = 100 10° V is applied across a capacitive load. The load takes apparent power of 1 kVA at 0.8 leading power factor. The reactance (Xc) of the load is ОНМ.
Q: 9.9 The motor in Problem 9.8 is operating at a slip of 0.035 with line-to-line input voltages of: H…
A:
Q: A balanced delta connected load having an impedance 20-j15 is connected to a delta connected,…
A:
Q: A three-phase motor draws 9 kVA at a lagging PF of 0.8 from a balanced system with line voltages of…
A:
Q: The total impedance of an induction machine is given by 10.5+6.5i O. Jf the phase voltage supplied…
A: The input power factor is 0.92. The explanation is provided below.
Q: Some parameters are given related to your student ID numbers. These are: V1 = 160V f1 = 70 Hz 1) A…
A: Explanation: “Since you have posted a question with multiple sub-parts, we will solve the first…
Q: Two Y-connected, three-phase synchronous generators supply a 415.68 kW load with a pf = 0.8(-) at a…
A: The following data is given in the question.
Q: Three Impedances each of (8 - j18) are connected in mesh across a three-phase 410V ac supply.…
A: In this question we need to find a line current , phase current , real power and reactive power of…
Q: The subtransient reactance of a generator is typically much larger than the steady-state reactance.…
A: 1 ) generally the subtrasient response of a generator is larger than the steady state reactance. So…
Q: QI. A balanced three-phase Y-connected generator with positive sequence has an impedance of 0.4 +…
A: The generator is Y- connected.
Q: A balanced A connected load having an impedance of 20-j15 Ω is connected to a A connected, positive…
A:
Q: A 1-phase alternator has a nameplate rating of 400V, 60Hz. The equivalent impedance of the…
A: The solution is given below
Q: A balanced three phase Y-connected generator with positive sequence has an impedance of 0.2 + j0.5…
A: As per Question the circuit-would be
Q: A single-phase load is supplied through a 35 kV feeder whose impedance is (95+j360) Ω and a 35 / 2.4…
A: Given Feeder voltage Vf =35 KV Feeder impedance Zf =(95+j360) Ώ Transformer rating = 35/2.4 KV LV…
Q: Q 3) The schematic diagram of a generator supplying two loads through a distribution system is shown…
A: Given that LoadA power PA= 8kw at 0.8leading Load B Power PB = 10kw at 0.6 lagging
Q: Two alternators are running in parallel to supply the following loads: LOAD 1, 400KW at unity power…
A:
Q: Problem 4: A three phase motor draws 30 kVA at 0.80 power factor lagging from a 480 V three phase…
A: The data are given as KVA ratingS1=30kVA,Power factorpf1=cosϕ1=0.8 laggingso, ϕ1=36.87°.1) Without…
Q: roblem 2 The following two three-phase loads are connected to a three-phase system of 311.13 cos…
A: Apparent power is given by Sm=10000 cos ϕ=0.6
Q: A 3-phase motor takes 10 kVA at 0.6 p.f lag from a 230V source. It is connected in parallel with a…
A:
Q: = 200/0° A balanced Y-connected generator with terminal voltage Vn volts is connected to a…
A: Sequence component: There are three sequence components in the power system, positive sequence,…
Q: Parallel Operation of Alternator. Two 3-phase 6.6 kV, star-connected alternators supply a load of…
A: In this question parallel connected alternators are given...We have to find line to line voltage of…
Q: 2) Two 3-phase star connected alternators share a load of 3 MW at 0.8 lagging power factor. The two…
A:
Q: The power factor angle of a three-phase synchronous generator rated at 10 kW, 230 V working at unity…
A: Let ∅ be the power factor angle , then power factor = cos(∅)
Q: Problem 2: A single phase 220 V generator supplies power to a series impedance Z=10 460°n , Find a)…
A: Given supply voltage(Vs)=200 vimpedance(Z)=10∠60°Ω
Q: A balanced three-phase, negative sequence, Y-connected generator is connected to a three-phase…
A: In this question, We need to determine the voltage across the generator terminal. All impedance…
Q: 13. A 25 kVA, 3-phase, Y-connected, 400 V synchronous generator has a synchronous impedance of 0.05…
A:
Q: A three-phase Δ-connected generator has an internal impedance of 9+j90 m Ω/ϕ. When the load is…
A:
Q: Q1. A balanced three-phase Y-connected generator with positive sequence has an impedance of 0.4 +…
A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: Two alternators A and B operate in parallel and supply a load of 15MW at 0.5 power factor lagging.…
A:
Q: Q1. A balanced three-phase Y-connected generator with positive sequence has an impedance of 0.4 +…
A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: Consider a 3-phase delta-star configuration with a generator and a 3-phase load. The generator…
A: In a delta connected source, the phase and line voltage are equal. So, the phase and line voltage at…
Q: Two wye connected alternators A and B are running in parallel to supply the following loads at 6.6…
A: Line and phase current in star connection remain same Line voltage is 1.732 times more than phase…
Q: A balanced three-phase Y-connected generator with Vhe = 440/20° V supplies an unbalanced A-connected…
A: Balance 3 phase star source supplied to the 3 phase unbalance delta load. What is line current…
Q: In a three-phase system phase shift between phases is 30°. Select one: O True O False
A: In this question, Choose the correct option. The given Statment In a three phase system phase…
Q: A 3-phase generator delivers power to a 2400 KVA (total), 16KV (line-to-neutral) load h a lagging…
A: Given:Load Power=2400KVALoad Voltage= 16KVP.F=0.8 laggingSynchronous reactance(XS) = j100Ω
Q: A balanced Star connected three-phase load draws 150 A per phase with a leading power factor of 0.7…
A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…
Q: A balanced three-phase, negative sequence, Y-connected generator is connected to a three-phase…
A: The solution is given below
Q: 7. The effective resistance of a 3 - phase, Y - connected 50 Hz, 2200 V synchronous generator is 0.5…
A: The solution is given below
Q: Two impedance, Z1 = 0.8+j5.62 and Z, = 8 – j16Q, and a single- phase motor are connected in parallel…
A: According to question we have to, (a) Draw the circuit. (b) Find the current in each branch and…
Q: The power factor angle of a three-phase synchronous generator rated at 10 kW, 415 V working at unity…
A: Unity power factor means power factor is unity.
Q: 11.18 A three-phase A-connected generator has an inter- nal impedance of 9 + j90 m2/4. When the load…
A: Since there are multiple sub-parts of the question, so it is requested to kindly specify which…
Q: Two Alternators working in parallel supply a water pump motor of 100KW with a power factor of 0.6…
A: In this question, We need to determine the KVA and power factor of the load if two loads are…
Q: A 3-phase generator rated 3000 KVA, 20 kV , 900 r/min, 60 Hz delivers power to a 16 KV, 75A load…
A: Need to find Eo
Q: An industrial plant uses two 3-phase induction motors rated at 460 V. At full load one draws 232 A…
A: The solution is given below
Q: b) A three-phase supply operating at 400 V 50 Hz is supplying a factory with two loads. Load A is…
A:
Q: A naval in-board synchronous generator has anapparent power of 50 kVA and supplies a…
A: To calculate the active power and reactive power of the synchronous generators. For power factor…
Q: What is the phase sequence of a three-phase motor for which VAN =220 /-100° V and VeN =220 140°V ?…
A: As per the guidelines given, we can only solve one question in multiple type questions. To get the…
Q: Suppose you have a three-phase generator that provides 120 Vac per phase and works at a frequency of…
A: Here in this solution the concept power & power factor for the delta & star connected 3…
Q: An ac generator has an effective resistance of 0.20 and synchronous impedance of 2.20. Find the…
A: Solve the problem
Q: 20) Two AC generators A and B are in Parallel. Each generator has an emf of 1000V per phase and in…
A:
Q: A three phase motor draws 30 kVA at 0.80 power factor lagging from a 480 V three phase generator. It…
A: In this question we need to find a capacitor bank rating use to increase the power factor from 0.8…
Step by step
Solved in 2 steps with 2 images
- In three phase, a 100KVA, 6.6 kV Y-connected cylindrical pole synchronous gen. has 20-ohm as synchronous reactance and the armature resistance is negligible and the generator is working at the full load and unity power factor then find the power angle. Please solve fast i'll give upvote this is a 10 marks question so please solve accordingly400 KVA, 400 V three-phase star connected 2p = 2 pole round rotor synchronous The leakage reactance of the generator is 0.1 Ω, and the armature reactance is 0.3 Ω. Friction-ventilation losses and iron losses total 20 KW (Other losses can be neglected). According to this; a) Pole wheel induced with generator at 80% load and cos? = 0.9 (inductive) Find the voltage, load angle, phase angle (power angle) and inner phase angle. b) Under these operating conditions, internal power (air gap power) and drive power (input power) calculate.A compound dc generator is supplying a load of 120A and 120V. The shunt field,series field and armature resistances are 32 ohms 0.07 ohms and 0.1 ohms respectively. Find the generated voltage in LONG SHUNT CONNECTION and SHORT SHUNT Connection NOTE: DRAW THE EQUIVALENT CIRCUIT DIAGRAM
- 380 V, 50 Hz, 2p = 6, star connected induction motor impedance in ohms per phase values:R1 = 0.3, X1 = j0.45, R2 = 0.15, X2 = j0.45, Xm = j15Its total mechanical losses are 500W. Core losses are negligible. For a rotor slip of 0.01 at rated voltage, calculate the following:a. Input currentb. power factorc. rotor frequencyExample 34.6. A 3.6 induction motor having a star-connected rotor has an induced e.m f. of §0 volis benween slip-rings at standstill on open-circuir. The rotor has a resistance and reactance per phase of 1 Qand 4 Q respectively. Caleulate current/phase and power factor when (a) slip-rings are short-circuited (b) slip-rings are comneced 10 a star-comnecred rheostat of 3 Q2 per phase. (Electrical Technology, Bombay Univ. 1987, and similar example: Rajiy Gandhi Techn, Uni. Bhopal, Dec. 2000)A short-shunt compound generator supplies a load of 10kW at 200V through a pair of feeder resistance 0.10, armature resistance is 0.010 and the shunt field resistance is 52.50 and the series field resistance is 0.102. If the SPL amounts to 631W, determine d) Electrical η ( 87.96% ) e) Commercial η. (83.33%)
- A long shunt compound generator delivers 100A, 250V at rated load. The resistances of the various windings are: Ra=0.1-ohm, Rip=0.02 ohm, Rsh=100 ohm and Rse= 0.025 ohm. If the stray power losses amount to 1.8kW solve for the overall efficiency of the generatora)the figure below shows the per-phase equivalent circuit of a two - pole three- phase induction motor operating at 50 Hz . The voltage (E1) across the magnetizing inductance is 210 v , and the slip (s) is 0.05 . What is the developed torque produced by the motor ? b) A 4 poles , 50Hz , Y-connected three phase induction motor has the per phase equivalent circuit parameters of (R1 =R2=0.12 , X1=X2=0.6 , Xm =12 ) ohm and I2 =20 (0 . Use exact equivalent circuit to determine the following at rated slip of 0.03 : I. Stator current II. Magnetizing current III. Power factor IV. Developed torque C) What is the physical meaning for each of the following induction motor parameters : R1 , R2 , Rc , X1 , X2 , Xm d) What is synchronous wattIn a slip power recovery system, 22 V/phase are injected into the rotor circuit of a fourpole,50 Hz, 380 V, star-connected slip-ring induction motor, reducing its speed to900 r/min. The stator impedance is (1,2 + j3,8) Ω/phase and the rotor impedance atstandstill is (0,4 + j0,8) Ω/phase. The admittance of the shunt magnetising circuit is0,3∟– 70° S per phase and the effective turns ratio is 2. Use the approximate equivalentcircuit and calculate the rotor referred current and power factor and the electromagnetic torque in Nm
- 3. Two balanced three-phase motors in parallel, an induction motor drawing 400 kW at 0.8 pf lagging and a synchronous motor drawing 150 kVA at 0.9 pf leading, are supplied by a balanced, three-phase, 4.16-kV source. Line impedances between the source and the load are neglected. a) Determine the power factor of the combined motor-load. b) Determine the magnitude of the line current in each motor c) Determine the magnitude of the line current delivered by the source.(use 2-decimal digits for solutions) A synchronous generator runs at 250 rpm and generates at 50-Hz. There are 216slots, each containing 5 conductors arranged in a full-pitched winding for 3-phasestar connection. All the conductors of each phase are in series and the flux perpole at no-load sinusoidally distributed over the pole pitch is 30 mWb. Find the emfinduced in each phase winding and the terminal voltage.A compound dc generator is supplying a load of 120A and 120V. The shunt field,series field and armature resistances are 32 ohms 0.07 ohms and 0.1 ohms respectively. Find the generated voltage in LONG SHUNT CONNECTION and SHORT SHUNT CONNECTION