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Building Technologies
9 Protection elements
Please note the following criteria for selecting suitable protection elements:
● Requirements from the protection concept
● Protection class
● Interface type
Various manufacturers provide suitable protection elements. The following tables
present suitable protection elements produced by the manufacturer DEHN:
Protection category I protection element (manufacturer DEHN)
Type Kind Designation Art. no. Comment
A Supply line
AC 115 V / 230 V
DB M 1 255 961 120 Lightning conductor
DB M 1 255 FM 961 125
Lightning conductor with remote feedback
contact
DGP M 255 961 101 Total current conductor for TT systems
DGP M 255 FM 961 105
Total current conductor for TT systems
with remote feedback contact
B Relay contact
(DC Un <33 V)
BXT ML4 BE 36 920 336 Protection module, 4 poles
BXT BAS 920 300 Basic part
C Switched output
DC 24 V
BXT ML2 BE S 24 920 224 Protection module, 2 poles
BXT ML4 BE 24 920 324 Protection module, 4 poles
BXT BAS 920 300 Basic part
D Line BXT ML2 BE S 48 920 225 Protection module, 2 poles
BXT ML4 BE 48 920 325 Protection module, 4 poles
BXT BAS 920 300 Basic part
E SAFEDLINK BXT ML2 BD HFS 5 920 271 Protection module, 2 poles
BXT ML4 BD HF 5 920 371 Protection module, 4 poles
BXT BAS 920 300 Basic part
SAK BXT LR 920 395 Spring clips for shield connection
F Relay coils control BXT ML2 BE S 24 920 224 Protection module, 2 poles
BXT ML4 BE 24 920 324 Protection module, 4 poles
BXT BAS 920 300 Basic part
G Supply for DC output BXT ML2 BD S 24 920 244 Protection module, 2 poles
BXT BAS 920 300 Basic part
H
DC 24 V input /
output
BXT ML2 BE S 24 920 224 Protection module, 2 poles
BXT ML4 BE 24 920 324 Protection module, 4 poles
BXT BAS 920 300 Basic part
I
Serial data
transmission (RS485)
BXT ML2 BD HFS 5 920 271 Protection module, 2 poles
BXT BAS 920 300 Basic part
SAK BXT LR 920 395 Spring clips for shield connection