A 480V synchronous generator. 200 kVA, 0.8 power factor lagging, 60 Hz, two poles. connected in Y. It has a synchronous reactance of 0.25Ω and an armature resistance of 0.04Ω at 60 Hz, its own friction losses and with the air are 6 kW and its core losses are 4 kW. The field circuit has a voltage of 200 V and the maximum Is is 10 A. The field resistance is adjustable in a range of 20 to 200 Ω. The generator occ is shown in the following figure… Assume that the field current of the generator adjusts to achieve nominal 480V voltage under full load conditions for each of the questions below. a) What is the efficiency of the generator at nominal load? b) What is the voltage regulation of the generator if it is loaded with nominal KVA with charges with a FP of 0.8 behind? c) What is the voltage regulation of the generator if it is loaded with nominal KVA with charges with a FP of 0.8 in advance? d) What is the voltage regulation of the generator if it is loaded with nominal KVA with loads with a unitary PF?
A 480V synchronous generator. 200 kVA, 0.8 power factor lagging, 60 Hz, two poles. connected in Y. It has a synchronous reactance of 0.25Ω and an armature resistance of 0.04Ω at 60 Hz, its own friction losses and with the air are 6 kW and its core losses are 4 kW. The field circuit has a voltage of 200 V and the maximum Is is 10 A. The field resistance is adjustable in a range of 20 to 200 Ω. The generator occ is shown in the following figure…
Assume that the field current of the generator
adjusts to achieve nominal 480V voltage under full load conditions
for each of the questions below.
a) What is the efficiency of the generator at nominal load?
b) What is the voltage regulation of the generator if it is loaded with nominal KVA
with charges with a FP of 0.8 behind?
c) What is the voltage regulation of the generator if it is loaded with nominal KVA
with charges with a FP of 0.8 in advance?
d) What is the voltage regulation of the generator if it is loaded with nominal KVA with loads with a unitary PF?
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