# Synchronous Generator Ratings

1. Dec 1, 2013

### sandy.bridge

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
$$S_{RATED}=I_{RATED}V_{RATED}$$

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.

Last edited: Dec 1, 2013
2. Dec 1, 2013

### dlgoff

Is the generator a 3 phase machine? If so, the apparent power = √3 Voltageline ⋅ Currentline.
13.8kv is a line voltage.

3. Dec 1, 2013

### sandy.bridge

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