A 70 kVA, 440 V, 50Hz, 4 poles, Y-connected three phase synchronous generator has armature resistance of 0.23 2/ph and synchronous reactance of 3.1 2/ph Calculate the following at rated load current with 0.8 power factor lagging: 1- Excitation voltage ? 2- Developed power? 3- Percentage Voltage Regulation? 4- Flux per pole if armature slots = 72 slots and total armature conductors = 720, assuming full pitched windings? 5- The amount of synchronous reactance which represent the effect of armature reaction if the armature leakage flux is 0.001 WB?

A 70 kVA, 440 V, 50Hz, 4 poles, Y-connected three phase synchronous generator has armature resistance of 0.23 2/ph and synchronous reactance of 3.1 2/ph Calculate the following at rated load current with 0.8 power factor lagging: 1- Excitation voltage ? 2- Developed power? 3- Percentage Voltage Regulation? 4- Flux per pole if armature slots = 72 slots and total armature conductors = 720, assuming full pitched windings? 5- The amount of synchronous reactance which represent the effect of armature reaction if the armature leakage flux is 0.001 WB?

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.56P: Three single-phase two-winding transformers, each rated 3kVA,220/110volts,60Hz, with a 0.10 per-unit...

See similar textbooks

Similar questions

An 135-pole d.c. shunt generator with wave wound armature having 620 conductors, has to supply a load of 170 lamps each of 135W at 235 v. The flux per pole is 22 mWb and Ra = 2 ohms, Rsh=70ohms. What will be the load current and e.m.f generated. Consider brush drop of 1.6v/brush. Load Current Generated EME
An 120-pole d.c. shunt generator with lap wound armature having 575 conductors, has to supply a load of 165 lamps each of 120W at 205 V. The flux per pole is 44 mWb and Ra = 1.4 ohms, Rsh=55 nee ohms. What will be the load current and e.m.f generated.
A 35-ohm diverter resistance is shunted across the series field of a DC series generator is supplying a current of 6 A to a series lighting system through a feeder of total resistance, 1.25 ohm. The terminal voltage is 2,300 V. The armature and series field resistances are respectively 18 and 15 ohms respectively. Determine the power developed in the armature of the generator?
The parallel operator of two dc generators will share the load current equally when: A. EA = EB and raA = raB. %3D B. PrA = PrB. C. VrA = VrB. D. When circulating current at no-load = zero.
Full solution for this question with explanation please
synchronous generator threewThe phases are rated at 1000 kVA and operate at a voltage of 6.6 kV. The product resistance per phase is 0.38 ohms and the leakage reactance is 0.5 ohms per phase. The generator works to provide full load at a power factor of 0.85 delayed and at normal voltages. Find the value of the no-load voltage.
A 1500 kVA, star-connected, 2300 V, 3-phase, salient-pole syn- chronous generator has reactances X4= 1.95 Q and X, = 1.40 2 per phase. All losses may be neglected. Find the excitation voltage for operation at rated kVA and power factor of 0.85 lagging.
A/ 10 MVA, 11 KV, 50 Hz, 3-phase star-connected alternator s driven at 300 RPM. The winding is housed in 360 slots and has 6 conductors per slot, the coils spanning (5/6) of a pole pitch. Calculate the sinusoidally distributed flux per pole required to give a line voltage of 11 kV on open circuit, and the full load current per conductor.
A 4 - pole shunt generator with wave - wound armature has 41 slots , each having 12 conductors . The armature resistance is 0-05 ohm and shunt field resistance is 200 ohm. The flux per pole is 25 mWb . If a load resistance of 10 ohm is connected across the armature terminals , calculate the voltage across the load when generator is driven at 1000 r.p.m
The 3-phase, 9 kVa power, 60 Hz, 208V 8-pole synchronous generator winding resistance is negligible and the synchronous reactance phase base is j8 ohms. The generator was first connected in parallel with a 3-phase 60 Hz 208 V generator. a) Calculate for phase pressure induced voltage cos = 0.8 (inductive), determine the power angle, draw the phasor diagram.
2A. What is another term for "shunt"? a) in series b) in parallel c) compounded d) none of the above 2B. Which of the following is/are a basic type of DC generator connection? a) series b) shunt c) compound d) all of the above
(a) A 4 pole generator with wave wound armature has 65 slots each having 14 conductors. The flux per pole is 20 mWb. At what speed must the armature rotate to give an induced EMF of 225V. (b) What will be the voltage developed, if the winding is lap connected and the armature rotates at the same speed