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3. A 3-0 star-connected alternator is rated at 1600 kVA, 13,500 V. The armature effecti resistance and synchronous reactance are 1.5 2 and 30 2 respectively per phase. Calcula the percentage regulation for a load of 1280 kW at power factors of (a) 0.8 leading ar (b)0.8 lagging. 4. Determine the voltage regulation of a 2,000-V, 1-phase alternator givinga current of 100 A 0.8 p.f. leading from the test results. Full-load current of 100 A is produced on short-circuitI a field excitation of 2.5 A. An e.m.f. of 500 V is produced on open-circuit by the san excitation. The armature resistance is 0.8 Q. Draw the vector diagram. [(a) –11.8% (b) 18.6% |- 8.9%

3. A 3-0 star-connected alternator is rated at 1600 kVA, 13,500 V. The armature effecti resistance and synchronous reactance are 1.5 2 and 30 2 respectively per phase. Calcula the percentage regulation for a load of 1280 kW at power factors of (a) 0.8 leading ar (b)0.8 lagging. 4. Determine the voltage regulation of a 2,000-V, 1-phase alternator givinga current of 100 A 0.8 p.f. leading from the test results. Full-load current of 100 A is produced on short-circuitI a field excitation of 2.5 A. An e.m.f. of 500 V is produced on open-circuit by the san excitation. The armature resistance is 0.8 Q. Draw the vector diagram. [(a) –11.8% (b) 18.6% |- 8.9%

Introductory Circuit Analysis (13th Edition)
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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3. A 3-0 star-connected alternator is rated at 1600 kVA, 13,500 V. The armature effective resistance and synchronous reactance are 1.5 2 and 30 2 respectively per phase. Calculate the percentage regulation for a load of 1280 kW at power factors of (a) 0.8 leading and (b)0.8 lagging. 4. Determine the voltage regulation of a 2,000-V, 1-phase alternator givinga current of 100 A at 0.8 p.f. leading from the test results. Full-load current of 100 A is produced on short-circuit by a field excitation of 2.5 A. An e.m.f. of 500 V is produced on open-circuit by the same excitation. The armature resistance is 0.8 Q. Draw the vector diagram. [(a) –11.8% (b) 18.6%] |- 8,9%]
Transcribed Image Text:3. A 3-0 star-connected alternator is rated at 1600 kVA, 13,500 V. The armature effective resistance and synchronous reactance are 1.5 2 and 30 2 respectively per phase. Calculate the percentage regulation for a load of 1280 kW at power factors of (a) 0.8 leading and (b)0.8 lagging. 4. Determine the voltage regulation of a 2,000-V, 1-phase alternator givinga current of 100 A at 0.8 p.f. leading from the test results. Full-load current of 100 A is produced on short-circuit by a field excitation of 2.5 A. An e.m.f. of 500 V is produced on open-circuit by the same excitation. The armature resistance is 0.8 Q. Draw the vector diagram. [(a) –11.8% (b) 18.6%] |- 8,9%]
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