Type 3 device – surge arrestors

Parameter/TypeKM3-10-1+1 SCKM3-10-3+1 SC
Type of networkTTTT
Nominal voltage230V AC230V AC
Maximum operating voltage L-N275V AC275V AC
Maximum operating voltage N-PE255V AC255V AC
Nominal discharge current (8/20μs) L-N5kA5kA
Nominal discharge current (8/20μs) N-PE10kA10kA
Test voltage L-N10kV10kV
Test voltage N-PE20kV20kV
Voltage protection level1kV1kV
Voltage protection level mode L-N1.5kV1.5kV
Voltage protection level mode N-PE1.5kV1.5kV
Maximum overcurrent protection
63A gL/gG or C 63 A
Response time L-N25ns25ns
Response time N-PE100ns100ns
Cross-section of connected conductors solid1/35mm²1/35mm²
Cross-section of connected conductors stranded1/25mm²1/25mm²
Fault indication L-N
Red indication field
Fault indication N-PE
Remote indicationPotential-free change-over contact
Remote indication contacts250V/0.5A AC, 250V/0.1A DC
Cross-section of remote indication conductors1.5mm²1.5mm²
Degree of protectionIP20IP20
Range of operating temperatures-40°C - +80°C-40°C - +80°C
MountingDIN rail 35mmDIN rail 35mm
According to standard
EN 61643-11:2012, IEC 61643-11:2011, T3