7
UK
6.1 Temperature factor / continuous current rating
The time-current characteristic curve depends on the ambient temperature. To
determine the max. permitted load current multiply the nominal device current by
the temperature factor taking into consideration the series connection.
Ambient temperature [°C]
0
10
23
40
50
60
Temperature factor
1
1
1
0.95
0.90
0.85
With series installation the nominal device current can be max. 80% or has to be
overdimensioned accordingly. With increased temperature the load current war-
ning limit "warning limit typ. 0.8 x I
N
" is reduced by the temperature factor.
6.2 Fail-safe element
The load circuits are additionally protected by the circuit protection modules that
are equipped with a fail-safe element (integrated fuse). The fail-safe element is
adapted to the nominal current I
N
of the respective circuit protection module and
the respective wire cross-sections.