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Synchronous Generator Ratings 
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#1
Dec113, 07:02 PM

P: 778

Hey all,
If we are given a synchronous generator with the following nameplate values 10MVA, 13.8kV, 2 pole, 60 Hz why is it not sufficient to go [tex]S_{RATED}=I_{RATED}V_{RATED}[/tex] as we did for transformers? My reason for asking is because I am trying to determine the voltage regulation of a particular generator. However, if I determine the full load current using the above formula, I get an absurd result. 


#2
Dec113, 08:56 PM

Sci Advisor
PF Gold
P: 2,723

Is the generator a 3 phase machine? If so, the apparent power = √3 Voltage_{line} ⋅ Current_{line}.
13.8kv is a line voltage. 


#3
Dec113, 09:09 PM

P: 778

How silly of me. Honestly, this entire time my issue was that I did not divide S by three. Thanks!



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