A 25kW series generator has an efficiency of 85% when operating at rated load. If the stray power loss is 20% of the full load loss, calculate the efficiency of the generator when it is delivering a load of 15kW.

A 25kW series generator has an efficiency of 85% when operating at rated load. If the stray power loss is 20% of the full load loss, calculate the efficiency of the generator when it is delivering a load of 15kW.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.21P: An industrial plant consisting primarily of induction motor loads absorbs 500 kW at 0.6 power factor...

See similar textbooks

Related questions

Q: Incremental fuel cost of a generator is given as 3 P12+ 40 P1 +90 $/MWh. Give the cost function and…

A: Incremental fuel cost of a generator is given as 3 P12+ 40 P1 +90 $/MWh. Give the cost function and…

Q: Which type of wind turbine has a higher cut-in speed and lower efficiency? O a. VAWT- drag type O b.…

A: Which type is wind has higher cut in speed and lower efficiency

Q: The terminal voltage of a 150 kW series generator is 600 V at rated load. Determine the generated…

Q: An 11-kV, 1000-kVA, 3-phase, Y-connected alternator has a resistance of 2 per phase. The…

Q: Calculate the blade length of a wind turbine rotor which produces a maximum power of 2.1 MW at a…

A: The max power is 2.1 MW The wind speed is 3.7 Km/Hr The air density is d=1.23 kg/m3 The generator…

Q: A correctly adjusted single-phase 240V, induction watt-hour meter has a meter constant of 600…

A: Given values, Voltage, V= 240 volt Current, I= 10 A Power factor, cosϕ= 0.8 lagging Meter constant,…

Q: 3-phase, Hz, delta connected generator, its stator winding having 12 slots per pole pair and 6…

A: Assume that number of poles is 4 . Given data Although it is known that formula of prime mover…

Q: shunt generator with a capacity of

Q: Q1) A 75 kW, 250 V compound dc generator has the following data: Ra=0.04 ohm, Rse=0.004 ohm, Rf =…

A: The detailed solution is provided below.

Q: 1. The magnitude of various voltage drops that occur in an altemator, depends on...... load current…

A: In this question, we have to do fill in blanks, (1) The magnitude of various voltage drops that…

Q: A 25-kW series generator has an efficiency of 85 per cent when operating at rated load. If the…

Q: A 3-phase 25kVA, 220V alternator delivers rated kVA at a pf of 0.84. The effective resistance…

A: An electrical device that produces an alternating current is called an alternator. Utilizing a motor…

Q: a) Calculate the variable and constant losses. b) Find the power required at the input of the…

Q: QI\ A short compound d.c. generator supplies a current of 75 A at a voltage of 225 V. Calculate the…

A: In this question We need to find a internal generated voltage

Q: A 400V, 3-phase Induction motor has output of 30HP and operates at power factor of 0.85 lagging with…

A: Given: A 3 phase induction motor having, Line voltage, VL = 400 V Output power = 30 Hp =…

Q: A separately excited d.c.generator has no load voltage of 120 V at field current of 2 A, when driven…

A: GivenV=Eg1=120 vfield current If1=2 Aspeed N1=1500 r.p.mseperately excited generator is operating on…

Q: A 425V, 3-phase Induction motor has output of 30HP and operates at power factor of 0.75 lagging with…

Q: .150KVA, 440 V, 50 Hz, star-connected diesel generator has armature reaction 1.6 S2 when it is…

A: Star Connection: A way of connecting polyphase circuits in which one end of each phase line is…

Q: In a motor-generator set, calculate the number of poles required in the motor to convert AC 60 Hz…

A: In this question , we will find no of poles of motor with given motor generator set data...

Q: A 50 kW, 200 V differentially compounded generator has NSE of 10 turns, NF of 3000 turns, and Rr of…

A: From the question, it is given thatP= 50 kWV=200 VNSE=10 TurnsFinding IIi=PV=50×103200=250…

Q: A 230V DC generator voltage is increased above the rated voltage when the field current increases…

A: In this question ,we will write about effect of field current on generator voltage ...

Q: 10 kW, 230 V, d.c shunt generator is operating at rated condition with 80% efficiency. Input power…

A: In this question, 10 kW, 230 V, d.c shunt generator is operating at rated condition with 80%…

Q: A 50 MVA, 11 kV, 3-phase generator has a stored energy of 400 MJ. Its inertia constant is?

A: Given a 3-phase generator with, MVA rating, S = 50 MVA Stored kinetic energy, K.E. = 400 MJ

Q: Two 220 V dc generator each having linear external characteristic operate in parallel. One machine…

Q: a- A DC generator has the following magnetization characteristics. 1 2 3 4 Field current (A)…

Q: 1-Plot the External, Internal and No-load characteristics curves of a de series generator.

A: You have posted multiple questions, so I am solving the 1st questions for you 1) Based on the given…

Q: A 50 kVA, 500 V, single phase alternator gives 700 V on open circuit at the field current of 15 A.…

Q: ne power station has rotor of small diameter and high length other than that used in hydrop

A: A synchronous generator is also known as an alternator in which the AC supply is given to the stator…

Q: A 30kW series generator has an efficiency of 88% when operating at rated load. If the stray power…

Q: A 100 MVA generator operates load of 50 Hz frequency. The load is suddenly reduced to 50 MW. The…

A: Given, Generator power rating, S = 100 MVA Frequency, fo = 50 Hz The load is suddenly reduced to,…

Q: 4. The input power to a 3-phase induction motor running without a load is measured by a two…

A: Given data, Wattmeter readings are given W1=-220 W, W2=940 W For two wattmeter power factor angle…

Q: (a) Differentiate between a Separately Excited Generator and a Shunt Generator.. Use an electrical…

Q: An 8-pole lap-wound d.c. generator has 120 slots having 4 conductors per slot. If each conductor can…

A: Induced emf in generator, E=ϕZNP60A where ϕ=flux/pole,z=condutors, N=speed,P=pole,A=2 for wave…

Q: QI A short compound d.c. generator supplies a current of 75 A at a voltage of 225 V. Calculate the…

A: Dear,as per company guidelines we can answer only one question at a time, kindly post other question…

Q: An 11-kV, 1000-kVA, 3-phase, Y-connected alternator has a resistance of 2 0 per phase. The…

Q: a four pole dc generator has an armature winding containing a total of 648 conductors connected in 3…

A: Concept: 1 maxwell= 10-8 weber Eg=P∅NZ60A V P: number of polesN: speed in rpm∅: flux per pole in…

Q: THydropower Plant System The following nametag is specification of a generator in a hydropower…

A: We are supposed to be answer of first four subparts of the question as per guildlines.

Q: A 425V, 3-phase Induction motor has output of 16HP and operates at power factor of 0.8 lagging with…

Q: 1. Calculate the demagnetising amp-turns of a 4-pole, lap-wound generator with 720 turns, giving 50…

A: As per guidelines we are supposed to do only 1st question when multiple questions are given. So…

Q: A Short shunt compound generator delivers a load current of 47 A at 244 V, and has the armature,…

A: Find the generated voltage of the short compound generator. Short shunt compound generator, shunt…

Q: A short, combined DC generator rotating at 1000 rpm, feeding a 45 kW load at 240 V supplies a…

A: Back EMF= Terminal voltage + voltage drop in series and armature resistance. power developed=Back…

Q: The shaft of a three-phase synchronous generator is rotating at 1800 RPM synchronous speed This…

Q: A 220V series generator has an armature resistance of 0.4Ω. If the generated emf is 230V and the…

A: In this question we need to find a what is the power (in watts) delivered to the load?

Q: A 6.6 kV, three-phase, star-connected turbo-alternator of synchronous reactance 0.5 ohm/phase is…

Q: 50 KW, 240 V enduvi resistance of a generator with foreign excitation is 0.02 ohms. Generator…

Q: A 6-pole alternator running at 1000 rpm, supplies an 8 pole induction motors. Find the actual speed…

Q: Write down construction of an alternator with help of diagram and write its principle of operation.…

A: The design of an alternator consists of field poles mounted on the machine's revolving fixture.…

Q: Explain the types of generators used in wind turbines with a neat diagram and also discuss the…

A: We have given the problem Explain the types of generators used in wind turbines with a neat diagram…

Q: A straight-line law connects terminal voltage and load of a 3-phase star connected alternator…

A: It is given that: cosϕ=0.8 laggingVt=3500 VPfl=2280kWVfl=3300VRL=8ohmXL=6ohm

Q: A 1500 kVA, star-connected, 2300 V, 3-phase, salient-pole syn- chronous generator has reactances X4=…

A: Evaluating the phase voltage at the load:

Question

A 25kW series generator has an efficiency of 85% when operating at rated
load. If the stray power loss is 20% of the full load loss, calculate the
efficiency of the generator when it is delivering a load of 15kW.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

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.)
An industrial plant consisting primarily of induction motor loads absorbs 500 kW at 0.6 power factor lagging. (a) Compute the required kVA rating of a shunt capacitor to improve the power factor to 0.9 lagging. (b) Calculate the resulting power factor if a synchronous motor rated at 500 hp with 90 efficiency operating at rated load and at unity power factor is added to the plant instead of the capacitor. Assume constant voltage (1hp=0.746kW).
Induction motors and welding transformers require magnetizing current, which causes a. lagging power factor. b. leading power factor. c. unity power factor. d. zero power factor.
A 25-kW series generator has an efficiency of 85 per cent when operating atrated load. If the stray-power loss is 20 per cent of the full load loss, calculatethe efficiency of the generator when it is delivering a load of 15 kW, assuming that the stray-power loss is substantially constant and the other losses vary as the square of the load.
A 50-kW generator has a full-load efficiency of 90.5 percent. Determine the total losses. Ans.: 5,250 watts explain step by step, circuit diagram, principles etc and also write it clearly.
A 500 kVA, 11 kV, 3-phase star-connected alternator has the following data : Friction and windage loss = 1500 W Open-circuit core loss = 2500 W Effective armature resistance per phase 40 ohm Field copper loss = 1000 W Find (a) alternator efficiency of half-full load and at 0.8 power factor lagging, (b) maximum efficiency of the alternator.
MERALCO Electrician has a 25 kW series generator used in street lighting has anefficiency of 85 % when operating at rated load. If the stray power loss is 20 %of the full load loss, calculate the efficiency of the generator when delivering aload of 15 kW, assuming that the stray power loss is substantially constant andthe other losses vary as the square of the load.
Q2/ A 50 kW, 200 V differentially compounded generator has NSE of 10 turns, NF of 3000 turns, and RF of 70 Ω. Calculate the value of the magnetomotive force at no-load and full-load operating conditions.
*need in 20 mins please :((* A short-shunt compound generator has armature, shunt field and series field resistances of 0.5 Ω, 125 Ω, and 0.321 Ω respectively. If it supplies a load of 8 kW at a terminal voltage of 233 V, calculate the generated emf in volt.
A short-shunt compound generator has armature, shunt field and series field resistances of 0.5 2, 156 R, and 0.465 2 respectively. If it supplies a load of 9 kW at a terminal voltage of 241 V, calculate the generated emf in volt.
A transmission line has a reactance of 1 Pu is operating at Vs = Vr = 1 Pu. The generator is connected at source end which is delivering 0.5 Pu of active power. Find the load angle?
A 1500 kVA, star-connected, 2300 V, 3-phase, salient-pole synchronous generator has reactance Xd= 1.95 ohm and Xq= 1.40 ohm per phase. All losses may be neglected. Find the excitation voltage for operation at rated kVA and power factor of 0.85 lagging.