Arc Flash Studies and Electric Utility Company Short Circuit Data

[@timfrey6087]

Can you show your work for the infinite bus calculation. I can not get the 31374 amps.

[@Brainfiller]

Sure thing.
SCA = short circuit amps (on secondary)
FLA2 = Full Load Amps (on secondary)
SCA = (FLA2 x 100) / %Z
FLA2 = 1500 kVA / [sqrt(3) x 0.48 kV] = 1804 Amps
SCA = [1804 Amps x 100] / 5.75
SCA = 31,374 Amps

[@timfrey6087]

Thank you