Q3 A wye-connected synchronous motor connected to a 440V, 3-phase line is operating with an electrical load (torque) angle 8 of -28 degrees while demanding 90 kW from the mains. The motor has negligible resistance and reactance of 1.5 2/ph. Calculate: (a) The line-to-neutral excitation voltage (b) The line current and power factor. ILZ pf Ex(LN)

Q3 A wye-connected synchronous motor connected to a 440V, 3-phase line is operating with an electrical load (torque) angle 8 of -28 degrees while demanding 90 kW from the mains. The motor has negligible resistance and reactance of 1.5 2/ph. Calculate: (a) The line-to-neutral excitation voltage (b) The line current and power factor. ILZ pf Ex(LN)

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

two synchronous generators are connected in parallel, feeding a load together. the frequency of the first generator in the no-load State is 52 Hz and the slope of the characteristic is 1 MW/Hz. the total power of the load fed by these two generators is 2.5 MW and the power coefficient is 0.6 inductive. by drawing the characteristic curve of the system;a) what is the frequency of the system when the load in question is fed, and how do the two generators share the load between themselvesb) if a load of 0.5 MW is added to the system, find the operating frequency of the new system and the powers given by each generatorc) if a second load of 0.5 MW is connected to the system, the idle operating frequency of the second generator is increased by 0.5 Hz, what happens to the operating frequency of the system and the power values given by the generators
Illustrate the circuit diagram
A 3Ø, Y-connected alternator is rated at 1,600KVA, 13.5KVv. The armature effective AC resistance per phase is 1.50. The percentage regulation for a load of 1,280kW at unity power factor is 3.5%. Determine: (a) synchronous reactance of the alternator (b) %VR at full-load 0.8pf leading (c) What is the effect on %VR value if taken at half-load lagging pf? Justify and explain briefly your answer on one(1) sentence.
By comparing the principle of operation of a "three" phase generation system with a single-phase system, state what are the bendfits of three phase systems? In your own words, define the "skin effect" in transmission lines and discuss how can it be minimised? Name three advantages of AC transmission in comparison to DC transmission. What are the units of active, reactive and apparent power? The current in a single-phase motor lags 50° behind the voltage. What is the power factor of the motor?
A 3Ø, Y-connected alternator is rated at 1,600KVA, 13.5KV. The armature effective AC resistance per phase is 1.5Ω. The percentage regulation for a load of 1,280kW at unity power factor is 3.5%. Determine:(a) synchronous reactance of the alternator(b) %VR at full-load 0.8pf leading(c) What is the effect on %VR value if taken at half-load lagging pf? Justify andexplain briefly your answer on one(1) sentence.
Two balanced three-phase motors in parallel, an induction motor drawing 400 kW at 0.8 pf lagging and a synchronous motor drawing 150 KVA at 0.9 pf leading, are supplied by a balanced, three-phase, 4.16-kV source. Line impedances between the source and the load are neglected. a) Determine the power factor of the combined motor-load. b) Determine the magnitude of the line current in each motor. c) Determine the magnitude of the line current delivered by the source.
Q1) A single-phase AC voltage controller is connected to an inductive load with a resistance of 10 and load impedance angle of 45°. The input ac voltage is 230 V at 50 Hz. (a) Draw the load voltage waveforms and derive an expression for the rms load voltage. (b) Determine the maximum load voltage, maximum load current, and range of delay angie for which the load voltage does not change.
A three-phase star-connected alternator is rated at 1500 KVA, 11 KV, The armature resistance and synchronous reactance are 1.5 Q and 25 Q per phase respectively. Calculate the percentage regulation for a load of a) 45% load at 0.7 power factor lagging. b) 65% load at 0.65 power factor leading. a) b)
Solve it clearly please with clearly steps