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QUESTION I A 10-MVA three-phase Y-connected 13,800 V two-pole 60 Hz turbogenerator has an armature resistance of 0.06 2 per phase and a synchronous reactance of 1.82 per phase. Find the excitation voltage at no load, half load, and full load for power factors of (a) (b) (c) with rated terminal voltage. 0.8 leading, unity, and 0.8 lagging QUESTION IL

QUESTION I A 10-MVA three-phase Y-connected 13,800 V two-pole 60 Hz turbogenerator has an armature resistance of 0.06 2 per phase and a synchronous reactance of 1.82 per phase. Find the excitation voltage at no load, half load, and full load for power factors of (a) (b) (c) with rated terminal voltage. 0.8 leading, unity, and 0.8 lagging QUESTION IL

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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QUESTION I A 10-MVA three-phase Y-connected 13,800 V two-pole 60 Hz turbogenerator has an armature resistance of 0.062 per phase and a synchronous reactance of 1.8 2 per phase. Find the excitation voltage at no load, half load, and full load for power factors of (a) 0.8 leading, (b) unity, and (c) 0.8 lagging with rated terminal voltage. QUESTION IL The rotational losses for a 1000 hp synchronous motor are found to be 18 kW. The motor operates from a 2300 V three-phase supply. The machine's synchronous reactance is 1.9 2 and that the armature resistance is negligible. Establish the following points (1l and E) on the V curve corresponding to full-load power output: 1. Stability limit, 8 = -90°. 2. Power factor of 0.8 lagging. 3. Unity power factor. 4. Power factor of 0.8 leading.
Transcribed Image Text:QUESTION I A 10-MVA three-phase Y-connected 13,800 V two-pole 60 Hz turbogenerator has an armature resistance of 0.062 per phase and a synchronous reactance of 1.8 2 per phase. Find the excitation voltage at no load, half load, and full load for power factors of (a) 0.8 leading, (b) unity, and (c) 0.8 lagging with rated terminal voltage. QUESTION IL The rotational losses for a 1000 hp synchronous motor are found to be 18 kW. The motor operates from a 2300 V three-phase supply. The machine's synchronous reactance is 1.9 2 and that the armature resistance is negligible. Establish the following points (1l and E) on the V curve corresponding to full-load power output: 1. Stability limit, 8 = -90°. 2. Power factor of 0.8 lagging. 3. Unity power factor. 4. Power factor of 0.8 leading.
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