: Determine the available fault current at the point of interest. This often involves calculating or looking up the fault current levels based on the system's design.
➜ Panel SCCR = (even though breaker is 65 kA) sccr calculation
If a or current-limiting circuit breaker is placed ahead of downstream components with lower SCCR, the let-through energy can be reduced, raising the effective SCCR. : Determine the available fault current at the
Line → Main fuse → Disconnect → Contactor → Overload relay → Terminal block → Load the let-through energy can be reduced
[ SCCR_panel = \min(SCCR_1, SCCR_2, ..., SCCR_n) ]