qortoo Latuoraabrul si tot enidbem eu7.4 A 1000 kVA, 3300 V, 60 Hz, four-pole, three-phase, wye-connected syn-chronous generator has synchronous reactance x, = 1. The generatoris delivering power to a load at a power factor of 0.8 lagging at ratedvoltage and at rated current. Find the speed, Ear, d, and the torqueof electric origin. (Answer: Ear=2015 V; 8 = 3.98⁰; Te4244 N-m)=

Answered: Image /qna-images/answer/460e7c5e-6f6d-4931-8a73-1a92a0abed7d.jpg

7.4 A 1000 kVA, 3300 V, 60 Hz, four-pole, three-phase, wye-connected syn- chronous generator has synchronous reactance x, = 10. The generator is delivering power to a load at a power factor of 0.8 lagging at rated al voltage and at rated current. Find the speed, Ear, 6, and the torque of electric origin. (Answer: Ear=2015 V; 8 = 3.98°; Te = 4244 N-m)

7.4 A 1000 kVA, 3300 V, 60 Hz, four-pole, three-phase, wye-connected syn- chronous generator has synchronous reactance x, = 10. The generator is delivering power to a load at a power factor of 0.8 lagging at rated al voltage and at rated current. Find the speed, Ear, 6, and the torque of electric origin. (Answer: Ear=2015 V; 8 = 3.98°; Te = 4244 N-m)

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...

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5)This MCQ QUESTION FROM BASIC POWER ELECTRICAL ENGINEERING course.
A synchronous generator is rated 645 MVA, 24 kV, 0.9 pf lagging. It has a synchronous reactance 1.2 . The generator is feeding full load at 0.9 pf lagging at rated voltage. Calculate: (a) Excitation emf (E,) and power angle 8 (b) Reactive power drawn by the load Carry out calculations in pu form and convert the result to actual values.
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A 381 V. 50 Hz Y-connected, eight poles synchronous generator has a per-phase synchronous reactance of 2.0 ohms and an armature resistance of 0.4 ohms. The generator supplies a 22 KVA load, at 0.8 PF lagging. Neglect Field circuit losses Find the Electrical losses and the % Voltage Regulation under those conditions
A synchronous generator is rated 645 MVA, 24 kV, 0.9 pf lagging. It has a synchronous reactance 1.2 . The generator is feeding full load at 0.9 pf lagging at rated voltage. Calculate: (a) Excitation emf (E,) and power angle & (b) Reictive power drawn by the load Carry out calculations in pu form and convert the result to actual values.
Question 7 The following diagram shows a DC generator delivering power to a static load under transient conditions. Ra Vt RL Rt Lt Load tir Vr Write expressions for the generated voltage (e,) in terms of the constant of proportionality, Ke.
A 3-phase generator possesses a synchronous reactance of 60 and the excitation (induced) voltage Eo is 3 KV per phase. Calculate line-to-neutral voltage E for a resistive load of 82 and draw the phasor diagram.
A 3-phase, 50 Hz, 16 pole generator with concentrated windings has 144 slots with 10 conductors per slot. The flux/pole of 24.8 mWb is sinusoidally distributed. The coil is full pitched. Find the line emf.
In a Three-phase alternator, a given field current produces an armature current of 250 A on short-circuit and a generated e.m.f. of 1500 V on open-circuit. Calculate the terminal p.d. when a load of 250 A at 6.6 kV and 0.8 p.f. lagging is switched off. Calculate also the regulation of the alternator at the given load. Subject: Electrical engineering
A three-phase synchronous generator is being used as a source of power for a farm in a remote area of Sindh. The apparent power rating of this generator is 100 KVA and the line to line voltage is 3000 V at 50 Hz. The configuration is star. When the terminals of the alternator are short-circuited, and a field current of 40 A is applied, a short circuit current of 200 A flows where when the terminals are open-circuited, with the same field current 1040 V are measured across the terminals. Calculate the voltage regulation for fully loaded conditions having the PF of both 0.8 leading as well as lagging. Use phasor diagrams. The effective armature resistance of this generator is 0.2 ohms. (Hint: Synchronous Impedance = (O.C Voltage/phase) / (S.C Current/phase))
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