Sccr Calculation

[ SCCR_panel = \min(SCCR_1, SCCR_2, ..., SCCR_n) ]

There are several methods to calculate SCCR, including: sccr calculation

SCCR (kA) = (1000 * S) / (√3 * V * Z)

The is the maximum symmetrical fault current (in kA) that a component or assembly can safely withstand without creating a safety hazard (e.g., arc flash, fire, or explosion). It is not a calculation of available fault current from the utility; it is a rating of the equipment. [ SCCR_panel = \min(SCCR_1, SCCR_2,

If a current-limiting fuse with SCCR ≥ 100 kA is used, downstream components with individual SCCR ≥ 5 kA can have an effective SCCR = 100 kA (or fuse SCCR), provided the fuse’s let-through energy does not exceed the component’s withstand. [ SCCR_panel = \min(SCCR_1