H.W.The table gives data for open-circuit and load zero power factortests on a 6-pole, 440 V, 50 Hz, 3-phase star-connected alternator. The effective ohmicresistance between any two terminals of the armature is 0.3.786「?「6 「10 」「12 「 1440474 530Field current(A)24O.C.terminalvoltage (V)156 288396440S.C.line11 2234404646current (A)Zero p.f.terminalI-1-1060voltage (V)568 59257698016"18161-80206314398460504Find the regulation at full-load current of 40 A ai 0.8 power factor lagging using(a) synchronous impedance method,(b) mmf method,(c) Potier-triangle method

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Answered: H.W.The table gives data for…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter31: Three-phase Alternators

Section: Chapter Questions

Problem 1RQ: What conditions must be met before two alternators can be paralleled together?

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What conditions must be met before two alternators can be paralleled together?
1. A3-phase, star-connected alternator is rated at 15000 kVA, 11 kV. The armature resistance is I-5 S/phase and synchronous reactance is 300/phase. To what value will the terminal voltage rise when full-load at p.f. 0-8 lagging is switched off? [13970 V]
Full solution for this question with explanation please
A single phase, 2000 V alternator has armature resistance and reactance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 A load at 0.8 leading power factor is ??
The rating of a three-phase star-connected alternator is 1750 KVA, 11 KV, The armature resistance is 1.2 Q and synchronous reactance is 25 2 per phase. Calculate the percentage regulation for a load of a) 55% load at 0.9 power factor lagging. b) 85% load at 0.65 power factor leading. a) b)
Generate a conclusion on this following statements: Determine and analyze the voltage regulation characteristics of the alternator with resistive, capacitive, and inductive loading.
If a 3-phase short circuit occurs at the terminals of an alternator, the current in the armature circuit increases suddenly to a large value. Select one: True False
2.
There are 160 slots in a 3-phase, 8-pole, 50 Hz., star connected alternator. There are 4 conductors in each slot and all the conductors in a phase are connected in series. Coil span is 150° electrical and the flux per pole is 0.08 Weber sinusoidally distributed. Calculate the emf induced per phase.
A three-phase, star-connected alternator has 6 number of poles, armature with 160 slots and 6 conductors per slot. The speed of rotation is 1000 rpm. The flux per pole is 0.06 weber. If the winding factor is 0.92 and all the conductors in each phase are in series. Calculate a) Frequency of generationAnswer for part 1 b) Number of turnsAnswer for part 2 c) EMF generated (phase voltage)Answer for part 3 d) EMF generated (Line voltage)
A three-phase 3300V. 50 Hz star-connected alternator has an effective resistance of 0.5 ohm/phase. A field current to of 30A produces full-load current of 180A on short- circit and a line to line emf of 1000V on open circit Determine(i) the power angle of the alternator when it delivers full-load at 0.8p.f(lag) (ii)the SCR of the alternator D
Please solve , last time i got wrong answer

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