1. A 2500-kVA, 6600-V, 3-phase, wye-connected alternator is operating at full-load and 0.8 p.f. lagging. This machine has a synchronous reactance per phase of 10.4 ohms and a negligible resistance. Calculate the open-circuit emf of the alternator.

1. A 2500-kVA, 6600-V, 3-phase, wye-connected alternator is operating at full-load and 0.8 p.f. lagging. This machine has a synchronous reactance per phase of 10.4 ohms and a negligible resistance. Calculate the open-circuit emf of the alternator.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Related questions

Q: connected alternator has a resistance of 0.075 2 per phase. Estimate the regulation for a load of…

A: This question is from "Electrical Machine". Under which we are going find out voltage regulation at…

Q: 5)This MCQ QUESTION FROM BASIC POWER ELECTRICAL ENGINEERING course.

Q: three-phase, wye connected alternator is rated at 720 kVA, 2400 V, 60 Hz. At the rated load,…

Q: A three-phase star-connected alternator is rated at 1500 KVA, 11 KV, The armature resistance and…

Q: : A three phase alternator is rated at 120 mva,13.2 kv,0.8 pf lagging, and 60 Hz. direct axis…

A: In the given question we note that A three-phase alternator is rated at 120 MVA , 13.2 Kv Power…

Q: A three-phase star-connected alternator is rated at 1750 KVA, 11 KV, The armature resistance and…

Q: Determine the efficiency of a 1500 kVA 2300V, three phase, Y-connected alternator which operate at…

A: Given data, 1500 KVA ,2300 V three phase Y connected alternator. operating at rated output Power…

Q: 3. A three-phase 60 Hz Wye connected, 2,000-kVA, 2,300-V alternator give a short circuit-test…

A: The solution is given below

Q: A four-pole three-phase 50 hertz, star connected AC generator has 12 stator slots. There are 4…

Q: Completely solve and box the final answer. Write legibly A 1200 kVA, 6600 volts, 3-phase Y…

A: The power factor of a Electrical system defines the relationship between the Real power and apparent…

Q: A3-phase, 10-pole alternator has 2 slots per pole per phase on its stator with conductors per slot.…

A: The given question requires finding the emf generated by an alternator with information of…

Q: A 400 v, 50 Hz, three phase alternators, rated at 75 kVA, is star connected and driven at 1000…

A: According to the question we have to find the smallest lagging power factor at which the alternator…

Q: The rating of a three-phase star-connected alternator is 1750 KVA, 11 KV, The armature resistance is…

A: we need to determine voltage regulation at given load and power factor.

Q: A three-phase alternator connected in delta of 100 KVA and 635 volts is tested for OCC, SCC and…

A: Given information about a three phase delta connected alternator is Rated terminal voltage Vt=635…

Q: 6. A 2000KVA, 3300V, 3-phase star -connected altemator delivers rated load at a P.F. of…

A: For an electrical machine efficiency is a very important parameter it tell us about how much power…

Q: 3. Find (a) the no-load phase voltage, (b) Kc and (c) Kd of a star- connected, 3-phase, 6-pole…

A: Number of poles is, .Speed, .Flux per pole, ..Each coil has turns and the coil is chorded by one…

Q: A 3-phase Y-connected alternator delivers a unity power-factor load at 200 volts. If the…

A: Given: 3 phase alternators Unity Power factor Load Vf = 200 Volt…

Q: Derive net RMS EMF induced in the stator winding, when there is an influence of 1st, 2nd harmonics.

A: EMF induced due to first harmonics is = RMS value is =

Q: Don't use other platforms answer and also don't use chatgpt. A 3 phase 6000 kVA, 6600V, Y connected…

Q: A 3-phase, 16-pole, 60 Hz star connected alternator has 144 slots and 12 conductors/slot. The…

Q: Plot the short circuit characteristic of the three-phase synchronous alternator.

Q: A 1200 kVA, 6600 volt, 3-phase Y connected alternator has an effective resistance of 0.40 ohm and a…

Q: ated output with a power factor of 80%. The DC armature resistance at 70°C between terminals is 0.08…

A: Given, Alternator rating = 1500KVA, 2300 V, 3-PHASE, Y-connected Power factor = 80% At 70° C,…

Q: Q6. Two identical Y-connected alternators are running in parallel. The generated phase voltages are:…

Q: A three-phase, star-connected, 10 kVA, 230 V alternator has an armature resistance of 0.5 02 per…

A: Given dataTo find outPercentage voltage regulation for a power factor of .Percentage voltage…

Q: unity, (b) 0.9 leading and (c) 0.71 lagging, form the open circuit and full load, zero pow

Q: A 3Ø, Y-connected alternator is rated at 1,600KVA, 13.5KV. The armature effective AC resistance per…

A: Given VL =13500 V Ra =1.5 Ω let Xs =synchronous reactance load power =1280 W at unit power factor

Q: A 1200 kW,60 Hz synchronous alternator A identical governor droop of 0.0005 Hz/kW.Machine A takes…

Q: A 550 volts, 55KVA single phase alternator has an effective resistance of 0.02 ohms, a field…

A: Given Data:- At full load, Voltage V=550 V Power S=55 kVA Effective resistance R=0.02 Ω Field…

Q: A 3Ø, 2000KW, 480V A-connected alternator is short-circuited and is operated at rated speed to…

A: Given data, No. of phase(ϕ)=3 Power(P3ϕ)=2000kW Voltage(VLL)=480V Rated Current(Isc)=P3ϕ3×VLL

Q: A 6000 volts, 2MVA turbo synchronous alternator is operating at 0.707 power factor lagging. This…

Q: 1. Define Pitch Factor /Distribution Factor and present the formula to calculate. 2. Draw the

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 9.a. If a 33% load increase is suddenly applied to an alternator having a 25% reactance, the initial…

A: According to question we have to, 9(a). If a 33% load increase is suddenly applied to an…

Q: A single-phase alternator produces at no-load an electromotive force E-230 V of frequency f= 50 Hz.…

A: As per the guidelines of bartleby we supposed to answer first three subpart only for solution of…

Q: A 3-phase, 450 V, 2-pole, 50 Hz, wye-connected, synchronous alternator. Xs = 1.62 ohm/phase.…

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

Q: A 1600KVA, 6.7 kV, 3 phase wye-connected alternator has an effective resistance of 0.50 ohm per…

Q: a) b) The value of excitation current required for full load current at 0.7 pf lagging…

A: Synchronous generator converts mechanical energy to electrical energy. The OCC curve is drawn…

Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

Please solve the problem and show the circuit diagram. Thank you.
1. A 2500-kVA, 6600-V, 3-phase, wye-connected alternator
is operating at full-load and 0.8 p.f. lagging. This machine
has a synchronous reactance per phase of 10.4 ohms and
a negligible resistance. Calculate the open-circuit emf of
the alternator.

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

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

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 6 pole, delta connected three-phase alternator having 144 slots is wound using double layer lap coils having 7 turns per coil. The coil has 16 / 24 pitch. The flux per pole is 7380000 maxuells. If the alternator is driven at a speed of 700 rpm, determine the total line-to-line generated voltage.
A 3Ø, Y-connected alternator is rated at 1,600KVA, 13.5KVv. The armature effective AC resistance per phase is 1.50. The percentage regulation for a load of 1,280kW at unity power factor is 3.5%. Determine: (a) synchronous reactance of the alternator (b) %VR at full-load 0.8pf leading (c) What is the effect on %VR value if taken at half-load lagging pf? Justify and explain briefly your answer on one(1) sentence.
A 20-pole, star-connected, three-phase alternator rotates at 300 r.p.m. The armature has 360 slots and 6 conductors per slot. The width of the coils is 5/6 of the pole pitch. If the maximum flux per pole, with a sinusoidal distribution, is 0.086 Wb, what will be the values of the emfs? phase and line? I need the procedure to get to that answer. Thank you
3. One phase of a 3-phase alternator consist of 12 coils in series. Each coil has an rms voltage of 10V induced in it and the coils are arranged in slots so that there is a successive phase displacement of 10 electrical degrees between the emf in each coil an the next. Find by calculation the rms value of the total phase voltage developed by the winding. If the alternator has six pole and is driven at 100 rpm.
Show that an alternator running in parallel on constant-voltage and frequency bus-bars has a natural time period of oscillation. Deduce a formula for the time of one complete oscillation and calculate its value for a 5000-kVA, 3-phase, 10,000-V machine running at 1500 r.p.m. on constant 50-Hz bus-bars. The moment of inertia of the whole moving system is 14,112 kg-m2 and the steady short-circuit is five times the normal full-load value. ANSWER IS [1.33 second]
A 30 MVA, 11KV, 50 Hz, star-connected three-phase alternator has an effective armature resistance per phase = 0.020 and synchronous reactance per phase = 2.252. Find the % regulation for a power factor of 0.707 lagging. What is the load angle of the alternator under this condition?
Draw a complete circuit diagram of 1 phase synchronous alternator including the field excitation circuit. Then, draw the phasor diagram of the generator a general leading power factor. Include the phase resistance in the diagram.
2MVA, 2.3kV 3Ø Y-connected alternator operates at rated kVA at a power factor of 80%. The DC armature winding resistance between terminals is 0.08Ω. The field takes 70A at 125V from an exciter equipment. Friction and windage loss is 20kW, iron losses 36kW and stray load losses are 2kW. Calculate the efficiency of the alternator. Assume the effective armature winding resistance is 120% of the DC resistance.
A three-phase star-connected alternator is rated at 1500 KVA, 11 KV, The armature resistance and synchronous reactance are 1.5 Q and 25 Q per phase respectively. Calculate the percentage regulation for a load of a) 45% load at 0.7 power factor lagging. b) 65% load at 0.65 power factor leading. a) b)