Problem 2.A 330 KW, 500 V dc shunt generator has an armatureresistance of 0.04 Q, the field resistance is 57 N. The straypower loss (SPL) at rated voltage and speed is 5,720 watts.Calculate:a. Full-load efficiencyb. Load at Max. Efficiencyc. Value of Max. Efficiency

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Answered: Problem 2. A 330 KW, 500 V dc shunt…

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 long shunt de generator supplies 8 kW at voltage of 250 V. The armature resistance, shunt field resistance and series field resistance are 0.45 2, 125 N and 0.05 N respectively. The machine works with the mechanical losses of 0.4 kW and efficiency of 80%. Draw the circuit with indication all values and find: i) The armature current ii) The copper losses iii) The develop power iv) The generating EMF v) The core losses
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A 50-kW generator has a full-load efficiency of 90.5 percent. Determine the total losses. Ans.: 5,250 watts explain step by step, circuit diagram, principles etc and also write it clearly.
Discussion:- 1. What do you understand by "armature- reaction"? Discuss the effect of armature reaction in an alternator when it is loaded with resistive, inductive and capacitive loads. 2. Give the value of voltage regulation for different power factors at full load current and interpret their values.
Q.8 A 220 V, 100 Kw separately excited d.c. generator has an induced e.m.f of 230 V at full load and a brush contact drop of 2 V. the armature resistance is . ohm. (A) 0.0167 (B) 0.0176 (C) 0.0716 (D) None
ANSWER THE PROBLEM, ILLUSTRATE THE CIRCUIT AND ANSWERS MUST BE IN 2 DECIMAL PLACES. A long shunt generator running at 1000 RPM supplies 20 kW at a terminal voltage of 220 V. The resistance of armature, shunt field, and series field are 0.04, 110 and 0.05 ohm respectively. The overall efficiency at the above load is 85%. Find: the total Copper loss, SPL, and the torque developed by the prime mover.
The emf generated in each conductor of a 6-pole simplex wave armature winding is 0.48 V. If the armature has 42 slots and 125 commutator segments, and there are four turns per armature winding element, find the terminal voltage of the generator. a. 288 V b. 264 V c. 192 V d. 240 V

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Problem 2. A 330 KW, 500 V dc shunt generator has an armature resistance of 0.04 Q, the field resistance is 57 N. The stray power loss (SPL) at rated voltage and speed is 5,720 watts. Calculate: a. Full-load efficiency b. Load at Max. Efficiency c. Value of Max. Efficiency