A three-phase Y-connected alternator delivers a unity power-factor load at 230 volts. If the synchronous-reactance voltage drop is 60 volts per phase, calculate the per cent regulation, neglecting the resistance voltage drop. Ans.: 9.77%

A three-phase Y-connected alternator delivers a unity power-factor load at 230 volts. If the synchronous-reactance voltage drop is 60 volts per phase, calculate the per cent regulation, neglecting the resistance voltage drop. Ans.: 9.77%

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

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.56P: Three single-phase two-winding transformers, each rated 3kVA,220/110volts,60Hz, with a 0.10 per-unit...

See similar textbooks

Related questions

Q: 5. Two 50 MVA, 3-phase alternators operate in parallel. The settings of governors are such that the…

A: When connecting transformers of the same size in parallel, the substation's space capacity is…

Q: What will be the voltage drop and regulation in resistive, inductive, capacitive load with the…

Q: A 4MVA, 13.3kV, 60Hz, 3-phase, wye-connected alternator has an effective resistance of 5.2 ohm per…

Q: 5. A 3-phase, 50 Hz, star-connected, 1000 KVA, 2300V alternator gives a short-circuit current of 400…

A: Given: A three phase synchronous generator in which

Q: DESCRIBE THE FREQUENCY AND GENERATED EMF PRODUCE BY THE SYNCHRONOUS ALTERNATOR. and EXPLAIN BRIEFLY…

Q: An 11-kV, 1000-kVA, 3-phase, Y-connecied alternator has a resistance of 22 per phase. The…

A: Given, 11kV 1000KVA, 3phase R=2 ohms per phase pf=0.8 lagging

Q: What happened to the no-end voltage of the alternator and the voltage drop and regulation in…

A: Concept: The variation of terminal voltage with load power factor for an alternator is given by the…

Q: A three-phase alternator of 4 poles and 60 HZ, connected in star of 100 KVA and 1100 volts is tested…

A: Note: We are authorized to answer three subparts at a time since you have not mentioned which part…

Q: Two identical 20 MW three-phase alternators operate in parallel. The governor of first machine is…

A: Given data : Rated load PL=20MW Frequencies on no-load and full load are 50Hz and 48Hz After drop…

Q: At 110 volts, a lagging power factor load in single-phase consumes 500 Watts and 8 Amperes.…

Q: For an alternator that underwent the typical tests, connected in a star, voltage and current data…

Q: (12) An alternator which is operating in parallel with other alternators at rated terminal voltage…

A: The solution is given below

Q: For the same alternator the ratio of rated kva ,when connected as a three phase winding alternator…

A: For 3-phase operation of the alternator. Phase spread ψ=π3 So, Kd3ϕ=sinψ2ψ2=sinπ32π32=3π Let…

Q: A three-phase Y-connected alternator delivers a unity power-factor load at 220 volts. If the…

A: In this question, we need to calculate a. calculate the generated voltage b. calculate the percent…

Q: three phase star connected alternator is rated at 1600kVA, 13500V. The armature resistance and…

A: Use direct regulation formula to find out the regulation of alternator

Q: How a combined cycle power plant produces balanced output power?

Q: A 50 kVA, 550 volt single phase alternator draws a field current 10A at rated load with the same…

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: Why rating of an Alternator is expressed in terms of VA,KVA or MVA ? Option 1: As losses are square…

A: The Rating of alternator is expressed in terms of VA, KVA Or MVA because ______.

Q: 5. Two 50 MVA, 3-phase alternators operate in parallel. The settings of governors are such that the…

Q: 5. A 3-phase, 50 Hz, star-connected, 1000 KVA, 2300V alternator gives a short-circuit current of 400…

A: DC resistance=0.412 Ω 3Q , 50H , YOpen circuit voltage=1328 voltShort circuit…

Q: - A3-phase, star-connected alternator is rated at 15000 kVA, 11 k V. The armature resistanc and…

A: The alternator is an electrical device used for the conversion of mechanical to electrical energy. A…

Q: A 4MVA, 13.3kV, 60Hz, 3-phase, wye-connected alternator has an effective resistance of 5.2 ohm per…

Q: Why brushless exciters are used in a synchronous generators. If two parallel alternators’ have…

A: The brushes are one of the important component of any machine. For the generators it is used to…

Q: A 1500KVA, 8KV, three-phase wye-connected alternator has an effective resistance of 0.502 and a…

Q: A 3-phase, star connected, 10 kVA, 400 V, salient pole alternator with direct and quadrature axis…

Q: An alternator of frequency 50.3 Hz is to be synchronized with an infinite bus of frequency 50 Hz by…

A: Given values are - Alternator frequencyfa=50.3HzBus frequencyfb=50Hz Given that alternator is…

Q: A single phase, 2000 V alternator has armature resistance and reactance of 0.8 ohms and 4.94 ohms…

A: Given, A single phase alternator has V= 2000 V R= 0.8 ohms X= 4.94 ohms I= 100 A Power factor,…

Q: Referring to the rated values of the components in Figure Q.2, draw the impedance diagram with all…

Q: A 3,000-kw 750-volt d-c 60-cycle six-phase synchronous converter is fed from a three-phase…

A: Given P=3000 kW Vdc =750 V pf =0.95 efficiency =0.96

Q: Y-connected, 9. A 3-phase, circuited and operated at rated speed to produce rated current. When the…

Q: A 1200 kVA, 6600 volts, 3-phase Y connected alternator, has an effective resistance of 0.4 ohms and…

Q: A three-phase, 4-pole, 1,500 rpm alternating having a double layer-windings with 18 turns per coil.…

Q: A 3-phase, wye connected alternator rated at 1600 kVA, 13.5 kV. The effective armature resistance…

A: Given: A 3-phase, wye connected alternator rated at 1600 kVA, 13.5 kV. Armature Resistance is,…

Q: 5. Two 50 MVA, 3-phase alternators operate in parallel. The settings of governors are such that the…

A: When load increase then speed decrease and so frequency also decreases. Given , Settings of governor…

Q: A three-phase Y-connected alternator delivers a unity power-factor load at 220 volts. If the…

A: The solution is given below

Q: Two similar 6600 V, 3-phase alternators are running in parallel sharing equally a total load of…

Q: Example 37.30. A 3.5-MVA, Y-connected alternator rated at 4160 volts at 50-Hz has the open- ircuit…

A: Given: A 3.5 MVA, Y-connected alternator rated 4160 V at 50 Hz has the open circuit characteristic…

Q: A three-phase alternator of 4 poles and 60 HZ, connected in star of 100 KVA and 1100 volts is tested…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Give the main parts (construction) of AC Generator (alternator). Define each.

Q: TWO SINGLE -PHASE ALTERNATORS HAS AN ARMATURE WINDING 'HOSE RESISTANCE AND SYNCHRONOUS REACTANCE…

Q: A 3-phase, 11 kV, 5 MVA alternator has synchronous reactance of 10 per phase. Its excitation is such…

A: Given a 3-phase, 11 kV, 5 MVA alternator has, Synchronous reactance, X=10 Ω Voltage, E = 11 kV…

Q: setting of the governor are such that the rise in speed from full load to no load is 2% in one…

Q: A sin-le-phase alternator, having a synchronous reactance of 5-5 2 and armature resistance of 0-6…

A: Given data : Armature resistance Ra=0.6Ω Synchronous reactance XC=5.5Ω Armature current ia=100A…

Q: 4. What do you mean by stray load loss of an alternator?

A: stray load loss of an alternator

Q: Q1: For the switching converter shown in the following figure, assume steady-state operation. Also…

A: It is given that: the circuit is in steady state.

Q: A single-phase fully-controlled converter is connected to a 240 V supply. Plot the d.c. generator…

A: We have given the following problem

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

Q: A 30 MVA, three-phase, wye-connected, 60 Hz, 13.8 kV synchronous alternator has negligible stator…

Question

A three-phase Y-connected alternator delivers a unity power-factor load at
230 volts. If the synchronous-reactance voltage drop is 60 volts per phase,
calculate the per cent regulation, neglecting the resistance voltage drop.
Ans.: 9.77%

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

SEE SOLUTION Check out a sample Q&A here

Similar questions

A three-phase Y-connected alternator delivers a unity power-factor load at 220 volts. If the synchronous-reactance voltage drop is 50 volts per phase, neglecting the resistance voltage drop. a. calculate the generated voltage b. calculate the percent regulation
A 1200 kVA, 6600 volt, 3-phase Y connected alternator has an effective resistance of 0.40 ohm and a reactance of 6 ohms per phase. It delivers full load current at 0.80 lagging power factor at rated voltage. What will be the terminal voltage for the same excitation and load current, if the power factor is 0.80 leading?
Two 50-MVA, 3-phase alternators operate in parallel. The settings of the governors are such that the rise in speed from full-load to no-load is 2 percent in one machine and 3 percent in the other, the characteristics being straight lines in both cases. If each machine is fully loaded when the total load is 100 MW, what would be the load on each machine when the total load is 60 MW? (Req'd) Draw an appropriate diagram.
A 3-phase, wye connected alternator rated at 1600 kVA, 13.5 kV. The effective armature resistance and synchronous reactance are 1.5 ohms and 30 ohms, respectively. What is the percent regulation for a load of 1280 kW at 0.80 leading power factor?
A 3-Phase 10Kva, 400 V, 50Hz star connected alternator supplies a rated load at 0.8 power factor lagging. If the armature resistance per phase is 0.5Ჲ and the synchronous reactance is 10Ჲ, using the e.m.f method, estimate the alternator’s voltage regulation
19.In a 3-phase star-connected alternator, a field current of 40 A produces a full load current of 200 A on short circuit and 1160 volt on open circuit. If the resistance of the alternator per phase is 0.50 ohm, then the value of the synchronous reactance is
The effective resistance of a 2200 V, 50 Hz, 440 KVA, 1 -phase alternator is 0.5 ohm. On short-circuit, a field current of 40 A gives the full load current of 200 AS. The electromotive force on open-circuits with same field excitation is 1160 V. Then the synchronous impedance and reactance is _______ ohm and _______ ohm respectively.
a. Draw the relationship between excitation current and short circuit, and Please explain. b. At what volts is the alternator end voltage short-circuited? At nominal voltage What will happen if a short circuit is made?
If, in a 3-φ alternator, a field current of 50Aproduces a full-load armature current of 200 Aon short-circuit and 1730 V on open circuit, then its synchronous impedance is ....... ohm.
A three-phase alternator of 4 poles and 60 HZ, connected in star of 100 KVA and 1100 volts is tested for OCC, SCC and winding resistance, giving the following data: Based on the above data, obtain: a) - The equivalent circuit per phase of the alternator b) - Operating speed c) - If it is synchronized with a power system whose frequency is 60 Hz and the alternator has a Sp=5 kW/Hz and its speed at the moment of synchronization is 1860 rpm, what power will it deliver? d) - What will be your internal voltage generated if you feed a load with forward PF of 0.9 and you are at 80% of your load? e) - For the case of item d), what is the reactive power delivered or consumed?
Two 60MVA, alternators operate in parallel. The setting of the governor are such that the rise in speed from full load to no load is 2% in one machine and 3% in the other, the characteristics being straight lines in both cases. If each machine is fully loaded when the total load is 120MW, what will be the load on the first machine (with 2% speed regulation) when the total load is reduced to 80MW?
A 1200 kVA, 6600 volts, three-phase wye connected alternator, has an effectiveresistance of 2.5 ohms and a reactance of 12 ohms per phase. Determine the inducedemf and the torque developed by the armature when fully loaded at 0.8 leading power factor.