KM2-20-1+0 SC

20kA Type 2 surge arrester
Single pole Type 2 surge arrester. Use in TN-C (L-PEN), TN-S (L-PE) and TT (L-N) system sub-distribution boards on the boundary of LPZ1 and LPZ2 (if >10m away from the MDB).

Suitable for houses, commercial and industrial buildings.

Category: Part: KM2-20-1+0SC
Order number
KM2-20-1+0 SC
System
Single phase TN-C/1 pole
Nominal voltageUn
230V AC
Nominal voltageUO
230V/400V AC ± 10%
Maximum operating voltageUc
275V AC/350V DC
Nominal discharge current (8/20μs)In
20kA
Maximum discharge current (8/20μs)Imax
40kA
Voltage protection level at 5kAUp
0.9kV
Voltage protection levelUp
1.35kV
Short-circuit current ratingISCCR
50kA
Maximum overcurrent protection
160A gL/gG
Response timeta
25ns
Cross-section of connected conductors solid (min - max)
1mm² - 35mm²
Cross-section of connected conductors stranded (min - max)
1mm² - 25mm²
Fault indication
Red indication field
Remote indication
Potential-free change-over contact
Remote indication contacts
250V/0.5A AC, 250V/0.1A DC
Cross-section of remote indication conductors
1.5mm²
Degree of protection
IP20
Range of operating temperatures (min - max)
-40°C - +80°C
Mounting
DIN rail 35mm
According to standard
EN 61643-11:2012, IEC 61643-11:2011 / T2
Weight
120g (nett), 140g (gross)
LPL III + IV
SYSTEM:SINGLE PHASE TN-C
SDB:BOUNDARY of LPZ1 & LPZ2 (if >10m away from MDB)

LPL I + II
SYSTEM:SINGLE PHASE TN-C
SDB:BOUNDARY of LPZ1 & LPZ2 (if >10m away from MDB)
  • Remote signalling
  • Reversible installation
  • Biconnect terminals
  • Locking pluggable modules
  • Optical lifetime status indication
  • No follow-through current
  • No leakage current
  • Coordinated range (install in close proximity to each other)

BS:EN 62305 (lightning protection) and EN 61643-11 (surge protection devices).

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C14902 SPD Installation Guide

Spare modules are available

DESCRIPTION
ORDER NUMBER
Spare Module L-N (L-PE)
KM2-20

Replace when fault indication indicator turns from green to red