generator fault current 2

[ksreddy35]

please let me know the fault current calculation of generator of 20 to 50 MW.

 

[slavag]

Hi.
For the start:
I3ph-fault=Inom gen/X"d (for the turbogenerator from 13%-17%).
Regards.
Slava

 

[ksreddy35]

Thank you for your reply,

For 30MW 11KV Generator, rated current is 1968, Xd"(sat)-11.84% & Xd"(unsat)-14.79. i have to take saturation value or unsaturation value of Xd".

 

[slavag]

Hi.
You have use saturated transient X"d 11.84%
Regards and Good Luck.
Slava

 

[ksreddy35]

thank you very much

 

[ksreddy35]

hi

you informed as below

For the start:
I3ph-fault=Inom gen/X"d (for the turbogenerator from 13%-17%).

but i have still one doubt i,e I nom gen (or) V nom gen.

 

[tem1234]

It is Inom in ampere and X"d in %

So I3ph = 1968/(11.84/100)