Short Circuit Current Calculator for Power Systems
Estimate prospective short-circuit current in electrical distribution systems.
Use this short circuit current calculator to estimate fault current levels and determine suitable circuit breaker interrupting ratings.
System Data
Network Details
V
Transformer Specs
%
Fault Current (Isc)
Max Estimation
Short Circuit Current
0.00
kA
Symmetrical Kiloamps
Absolute Amps
0
A
Amperes
Infinite Bus Assumption
This estimation assumes infinite available primary utility fault current and zero line impedance. Motor contributions are NOT included.
Base System Metrics
Transformer Data
Full Load Amps (FLA)
0.0
A
Base operating current
Fault Capacity
0.0
MVA
Short circuit MVA level
Engineering Reference
Short Circuit Formula
Isc = FLA / (%Z / 100)
Multiplier Method
Multiplier = 100 / %Z
- Isc = Short Circuit Current
- FLA = Full Load Amperes
- %Z = Transformer Impedance
- MVA = Fault Level in MVA