KM2-20-1+1 SC

20kA Type 2 surge arrester
Combination of varistor SPD and encapsulated spark gap connected in the 1 + 1 mode. Use in TT systems on the boundary of LPZ1 and LPZ2.

Suitable for houses, commercial and industrial buildings.

Category: Part: KM2-20-1+1SC
Order number
KM2-20-1+1 SC
System
Single phase TT/2 pole
Nominal voltageUn
230V AC
Nominal voltageUO
230V/400V AC ± 10%
Maximum operating voltage L-NUc
275V AC
Maximum operating voltage N-PEUc
255V AC
Nominal discharge current (8/20μs) L-N/N-PEIn
20kA
Maximum discharge current (8/20μs) L-N/N-PEImax
40kA
Voltage protection level at 5kA L-NUp
0.9kV
Voltage protection level mode L-NUp
1.35kV
Voltage protection level mode N-PE/L-PEUp
1.5kV
Ability to independently switch off the following current N-PEIf1
0.1kA
Short-circuit current ratingISCCR
50kA
Maximum overcurrent protection
160A gL/gG
Response time L-Nta
25ns
Response time N-PEta
100ns
Cross-section of connected conductors solid (min - max)
1mm² - 35mm²
Cross-section of connected conductors stranded (min - max)
1mm² - 25mm²
Fault indication L-N
Red indication field
Fault indication N-PE
No
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
225g (nett), 255g (gross)
LPL III + IV
SYSTEM:SINGLE PHASE TT
MDB:-
SDB:BOUNDARY of LPZ1 & LPZ2 (if >100m away from MDB)

LPL I + II
SYSTEM:SINGLE PHASE TT
MDB:BOUNDARY of LPZ0 & LPZ1
SDB:BOUNDARY of LPZ1 & LPZ2 (if >100m 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).

CLICK THE IMAGE BELOW TO DOWNLOAD INSTALLATION GUIDE PDF

C14902 SPD Installation Guide

Spare modules are available

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

Replace when fault indication indicator turns from green to red