A 3-phase, 1.2 MVA, Y-connected, 6.6 KV, 6-poles, 60 HZ,
synchronous generator has a synchronous reactance...
A 3-phase, 1.2 MVA, Y-connected, 6.6 KV, 6-poles, 60 HZ,
synchronous generator has a synchronous reactance of 30W and
negligible resistance. The generator is connected to an infinite
bus at 6.6 KV and 60 Hz.
a)Determine the excitation voltage (Ea) when the machine is
delivering rated power at o.8 PF lagging.
b)The field excitation current is increased by 10% without
changing the power input from the prime mover. Find the stator
current (Ia), the power factor and the reactive power...
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected
synchronous generator has a synchronous reactance,...
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected
synchronous generator has a synchronous reactance, Xs = 17.9, and
is connected to an infinite bus at rated voltage. If the rotational
and electrical losses are negligivle, what is Ia, Ef, delta, theta,
Tdrive, Phasor diagram, and power flow diagram (label completely
with numerical values for,
A) the machine as a generator; the prime-throttle is opened and
If is adjusted so that the machine delivers rated kVA, 0.8 pf
lagging,...
Please be clear in conceot and handwriting, thank
you.
A 20 kVA three-phase synchronous machine is...
Please be clear in conceot and handwriting, thank
you.
A 20 kVA three-phase synchronous machine is connected to a 480
V, 60 Hz electrical service.
The per-phase armature reactance is 80%. Armature resistance is
negligible, as are all other sources of power loss.
Part A: Motor Configuration
The machine is configured to run as a motor. Its rated mechanical
power is 20 HP and it is 94% efficient.
The motor provides rated output mechanical power.
The excitation is set such...
Hello,
I was wondering what it means for the power factor of a synchronous
motor to...
Hello,
I was wondering what it means for the power factor of a synchronous
motor to change and how changing the load changes the PF, i mean
what is changing here? the load that we add to the shaft is
mechanincal then how come the power factor changes?
I'm checking my answers since it's REALLY important I get this
right. Please show how you...
I'm checking my answers since it's REALLY important I get this
right. Please show how you attained the answer for each. Honestly,
part C, the diagram, is what I have the most issue with.
An AC generator with emf amplitude E=220V and operating
frequency 440Hz causes oscillations in a series RLC circuit having
R=220 ohms, L=150 milliHenrys, and C=24.0 microFarads.
a)Find Inductive reactance XL, capacitive reactance XC, and
impedence Z
b)Find the current amplitude I, power factor, average and peak...