Longer cable runs increase impedance, which actually decreases the fault current.
Isc=VLL3×Ztotalcap I sub s c end-sub equals the fraction with numerator cap V sub cap L cap L end-sub and denominator the square root of 3 end-root cross cap Z sub t o t a l end-sub end-fraction (Where VLLcap V sub cap L cap L end-sub is the line-to-line voltage) . short ckt current calculation
For a fault right at the transformer's secondary side, you calculate current based on its Full Load Amps (FLA) and percentage impedance (%Z) : It’s the difference between a controlled shutdown and
Short-circuit current calculation isn’t an academic exercise. It’s the difference between a controlled shutdown and a catastrophic arc flash. You don’t calculate it to impress your boss—you calculate it to ensure that when the fault happens (and it will), the only thing that gets hurt is your pride, not your people. not your people.