The short circuit current is inversely proportional to the transformer's impedance.
Before you start the math, you need three specific pieces of information from the transformer’s nameplate: calculate transformer short circuit current
These numbers help engineers determine the "incident energy" levels, which dictate the PPE (Personal Protective Equipment) electricians must wear. The short circuit current is inversely proportional to
Your circuit breakers and fuses must have an Interrupting Capacity (AIC) higher than the calculated Isccap I sub s c end-sub Isccap I sub s c end-sub calculate transformer short circuit current
is 24kA and your breaker is only rated for 10kA, the breaker may explode or weld shut during a fault.