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A 480-V. 60-Hz, A-connected, four-pole synchronous generator. This generator has a synchronous reactance of 0.12 and an armature resistance of 0.01512, At full load, the machine supplies 1200 A at 0.8 PF lagging. Under full-load conditions, the friction and windage losses are 40 kW, and the core losses are 30KW. Ignore any field circuit losses. (a) What is the speed of rotation of this generator? (b) If the generator is now connected to a load and the load draws 1200 A at 0.8 PF lagging, find armature rms induced voltage (EA)? (c) How much power is the generator now supplying? How much power is supplied to the generator by the prime mover? What is this machine's overall efficiency?

A 480-V. 60-Hz, A-connected, four-pole synchronous generator. This generator has a synchronous reactance of 0.12 and an armature resistance of 0.01512, At full load, the machine supplies 1200 A at 0.8 PF lagging. Under full-load conditions, the friction and windage losses are 40 kW, and the core losses are 30KW. Ignore any field circuit losses. (a) What is the speed of rotation of this generator? (b) If the generator is now connected to a load and the load draws 1200 A at 0.8 PF lagging, find armature rms induced voltage (EA)? (c) How much power is the generator now supplying? How much power is supplied to the generator by the prime mover? What is this machine's overall efficiency?

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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A 480-V, 60-Hz, A-connected, four-pole synchronous generator. This generator has a synchronous reactance of 0.12 and an armature resistance of 0.0152, At full load, the machine supplies 1200 A at 0.8 PF lagging. Under full-load conditions, the friction and windage losses are 40 kW, and the core losses are 30 kW. Ignore any ficld circuit losses. (a) What is the speed of rotation of this generator? (b) If the generator is now connected to a load and the load draws 1200 A at 0.8 PF lagging, find armature rms induced voltage (EA)? (e) How much power is the generator now supplying? How much power is supplied to the generator by the prime mover? What is this machine's overall efficiency? (d) If the generator's load were suddenly disconnected from the line, what would happen to its terminal voltage? (e) Suppose that the generator is connected to a load drawing 1200 A at 0.8 PF leading find armature rms induced voltage (EA)?
Transcribed Image Text:A 480-V, 60-Hz, A-connected, four-pole synchronous generator. This generator has a synchronous reactance of 0.12 and an armature resistance of 0.0152, At full load, the machine supplies 1200 A at 0.8 PF lagging. Under full-load conditions, the friction and windage losses are 40 kW, and the core losses are 30 kW. Ignore any ficld circuit losses. (a) What is the speed of rotation of this generator? (b) If the generator is now connected to a load and the load draws 1200 A at 0.8 PF lagging, find armature rms induced voltage (EA)? (e) How much power is the generator now supplying? How much power is supplied to the generator by the prime mover? What is this machine's overall efficiency? (d) If the generator's load were suddenly disconnected from the line, what would happen to its terminal voltage? (e) Suppose that the generator is connected to a load drawing 1200 A at 0.8 PF leading find armature rms induced voltage (EA)?
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