A 690 KVA, 4200-V, 60 Hz, 0.9 PF lagging, Delta-connected, 8- pole synchronous generator has an armature resistance of 0 Q. The OCC and SCC characteristics are given below in a tabular form. Find the generator's synchronous reactance at rated armature current. IF (A) 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25 2.5 2.75 3.0 Vr (V) | 400 | 1200 | 1850 2450 2950 3500 3800 4200 4400 | 4550 | 4650 4750 4820 lA (A) 20 45 70 95 125 150 175 200 230 255 280 310 340 Select one: O a. Xg = 8.6 Ohms O b. X = 14.9 Ohms O c. None O d. Xg = 25.8 Ohms O e. Xg = j25.8 Ohms

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A 690 KVA, 4200-V, 60 Hz, 0.9 PF lagging, Delta-connected, 8- pole synchronous generator has an armature resistance of 0 Q. The OCC
and SCC characteristics are given below in a tabular form.
Find the generator's synchronous reactance at rated armature current.
IF (A)
0.25 0.5
0.75 1.0
1.25
1.5
1.75 2.0
2.25
2.5
2.75
3.0
Vr (V) | 400 1200 1850 2450 2950 3500 3800 4200 4400 4550 4650 4750 4820
lA (A)
20
45
70
95
125
150
175
200
230
255
280
310
340
Select one:
O a. Xg = 8.6 Ohms
O b. X, = 14.9 Ohms
c. None
d. Xs = 25.8 Ohms
e. Xg = j25.8 Ohms
Transcribed Image Text:A 690 KVA, 4200-V, 60 Hz, 0.9 PF lagging, Delta-connected, 8- pole synchronous generator has an armature resistance of 0 Q. The OCC and SCC characteristics are given below in a tabular form. Find the generator's synchronous reactance at rated armature current. IF (A) 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25 2.5 2.75 3.0 Vr (V) | 400 1200 1850 2450 2950 3500 3800 4200 4400 4550 4650 4750 4820 lA (A) 20 45 70 95 125 150 175 200 230 255 280 310 340 Select one: O a. Xg = 8.6 Ohms O b. X, = 14.9 Ohms c. None d. Xs = 25.8 Ohms e. Xg = j25.8 Ohms
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