apple4ever
New Member
Hi !
I need some expert help on this, I've been stuck on this question for ever.
18.6KVA, 3 phase, Y-connected synchronous has synchronous reactance of 2.2 ohms per phase. The generator is connected to a 440V, three phase line. The resistance of the armture is negligible.
Calculate the power factor and the load angle of the generator if the magnitude of the generated e.m.f. is 285V
Heres what I managed to work out
Armature resistance = 0
V line = 440V
V phase = 440/root 3= 254V
s phase=s/3=6.2kVA
IA = 6.2kVA/254V = 24.4 A
Ea = V phase + IA ( Ra+Jxs)
285=254+24.4 angle_theta (j2.2)
285=254+(24.4 x angle_theta) (2.2angle_90)
So I am basically stuck at this point, how do I go on in finding the power factor and the load angle from that?
I need some expert help on this, I've been stuck on this question for ever.
18.6KVA, 3 phase, Y-connected synchronous has synchronous reactance of 2.2 ohms per phase. The generator is connected to a 440V, three phase line. The resistance of the armture is negligible.
Calculate the power factor and the load angle of the generator if the magnitude of the generated e.m.f. is 285V
Heres what I managed to work out
Armature resistance = 0
V line = 440V
V phase = 440/root 3= 254V
s phase=s/3=6.2kVA
IA = 6.2kVA/254V = 24.4 A
Ea = V phase + IA ( Ra+Jxs)
285=254+24.4 angle_theta (j2.2)
285=254+(24.4 x angle_theta) (2.2angle_90)
So I am basically stuck at this point, how do I go on in finding the power factor and the load angle from that?