title: COSEL High-SCCR EMI Filters, SCCR value: 14kA/25kA/50kA

Summary

COSEL High-SCCR EMI Filters, SCCR value: 14kA/25kA/50kA

COSEL EMI FiltersHigh-SCCR EMI FiltersSCCR value: 14kA/25kA/50kA01 EMI Filters are subject to SCCR* 1 in the UL508AThe National Electrical Code (NEC) and NFPA 79, the U.S. electrical standard for industrial machinery, require that theSCCR (Short-Circuit Current Rating) be clearly marked on industrial control panels of equipment exported to the U.S.EMI filters are subject to SCCR requirements under UL 508A and are inspected when exported to North America.*1 SCCR(Short-Circuit Current Rating) refers to the maximum short-circuit current that the equipment in each power circuit can safely withstand.02Why EMI Filters Require an SCCR?This is to prevent secondary disasters such as firescaused by short-circuit current in the event of anelectrical accident. Since EMI filters do not havebuilt-in protective devices, the effects of short-circuitaccidents cannot be determined. Therefore, byconducting SCCR testing in combination with abreaker serving as the protective device, and byverifying that the equipment can withstand theshort-circuit current without any abnormalities, therisk of secondary incidents?including smoke or fire?can be eliminated.Power sourceConrol panel(Control and power circuits）Other equipmentsSAFE03Why is high SCCR required?As the control panel capacity increases, the required SCCR value increases accordingly. Since the SCCR of apanel is determined by the lowest SCCR value within it, if the panel includes a branch circuit and EMI filters areinstalled downstream of that branch, those EMI filters must also have a high SCCR value.5kA14kA14kA14kA?breakerEMIfilters5kA14kA