.150KVA, 440 V, 50 Hz, star-connected diesel generator has armature reaction 1.6 S2 when it is supplying rated current at 0.8 p.f lagging. If the armature resistance is 0.3 and self-reactance half the effect of armature reaction determine (a) the no-load voltage when the load is disconnected and (b) the no-load voltage when the alternator terminals are short circuited.

.150KVA, 440 V, 50 Hz, star-connected diesel generator has armature reaction 1.6 S2 when it is supplying rated current at 0.8 p.f lagging. If the armature resistance is 0.3 and self-reactance half the effect of armature reaction determine (a) the no-load voltage when the load is disconnected and (b) the no-load voltage when the alternator terminals are short circuited.

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...

See similar textbooks

Similar questions

There are 144 slots in a 3-phase, 16-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 1500 electrical and the flux per pole is 0.05 Weber sinusoidallly distributed. Calculate the emf induced per phase.
Please solve , last time i got wrong answer
A synchronous generator runs at 250 rpm and generates at 50-Hz. There are 216 slots, each containing 5 conductors arranged in a full-pitched winding for 3-phase star connection. All the conductors of each phase are in series and the flux per pole at no-load sinusoidally distributed over the pole pitch is 30 mWb. Find the emf induced in each phase winding and the terminal voltage.
A 2MVA, 2.3kV three – phase Y – connected alternator operates at rated kVA at a power factor of 80%. The dc armature winding resistance between terminals is 0.08 ohm. The field takes 70 A at 125 V from an exciter equipment. Friction and windage loss is 20kW, iron losses 36kW and stray load losses are 2.0 kW. Calculate the efficiency of the alternator. Assume the effective armature winding resistance is 120% of the DC resistance. a. 94.0 % b. 92.1 % c. 93.2 % d. 89.5 %
A three-phase, 4-pole, 1,500 rpm alternating having a double layer-windings with 18 turns per coil. The slots per pole per phase are 10 and the coil span is 22 slots. The spread phase is 60 degrees and the flux per pole is 0.0625 Weber. If the armature windings are wye connected. a) Determine the generated voltage per phase and the line to line voltages. b) If the alternator is delivering a three - phase load of 1,200KW at 0.8 lagging power factor what is the line current of the alternator
1.) A 6-pole, 3-phase, 60-Hz alternator has 12 slots per pole and four conductors per slot. The winding is 5/6 pitch. There are 0.025 Wb entering the armature from each north pole, and this flux is sinusoidally distributed along the air gap. The armature coils are all connected in series. The winding is wye-connected. Determine the open circuit emf per phase of the alternator. Subject Electrical machine 2
5)This MCQ QUESTION FROM BASIC POWER ELECTRICAL ENGINEERING course.
Two 30 AC generators are such that one has twice the linear dimensions of the other. The field windings of each are excited to give identical sinusoidal air gap flux density waveform. Both have the same number of stator slots and identical winding patterns. The conductors per slot in big generator in K times that of the smaller one. The value of K to get equal no-load voltage at same frequency is (a)8 (b) 8 1 (d) 7 (c) 4
Full solutions for the question with explanation
The terminal voltage of a 150 kW series generator is 600 V at rated load. The armature resistance is 0.06 ohms and the series field resistance is 0.04 ohms. Find generated emf.
A long shunt compound generator delivers a current of 10A at 200V and has a series field resistance and shunt field resistance of 1 ohm and 200 ohms respectively. Then line current is a. 2A b. 1A c. 9A d. 10A
Q2: A three phase alternator is rated at 120 mva,13.2 kv,0.8 pf lagging, and 60 Hz. its direct axis reactance is 0.62 N and its quadrature axis reactance is 0.4 N.all rotational losses may be neglected . 1-What is the voltage of this generator at the rated condition? 2- what is the voltage regulation of this generator at the rated conditions?