fault current calculations? transformer

[Kenneth Hunter]

what is the formula for calculating a fault in a 3 phase transformer?

 

[davidr43229]

http://www.bussmann.com/apen/software/s_circuit.asp

 

[jtester]

The formula is (full load current*100)/%z= fault current.

Jim T

 

[Kenneth Hunter]

thanks for the formula info.

 

[Kenneth Hunter]

thanks for the calculation site very helpful

 

[necnotevenclose]

here is a link to a good article in EC&M about fault calculations:

http://ecmweb.com/mag/electric_beware_simplistic_fault/index.html

 

[zog]

Dont forget to add motor contribution