Technical data

120
Protective Devices
Short Circuit Selectivity PLHT towards NZM 1
In case of short circuit, there is selectivity between the miniature circuit breakers PLHT and the upstream NZM up to the specified values of the selectivity limit
current I
s
[kA] (i. e. in case of short-circuit currents I
ks
under I
s
, only the MCB will trip, in case of short circuit currents above this value both protective devices
will respond). Overload and short-circuit release unit NZM at max. value.
*) basically in accordance with EN 60898-1 D.5.2.b
Short circuit selectivity characteristic C towards NZM*)
PLHT NZM...1-A gL/gG
I
n
[A] 40 50 63 80 100 125
20 0.3 0.4 0.5 0.75 0.9 1.25
25 0.3 0.4 0.5 0.7 0.9 1.2
32 0.4 0.5 0.7 0.85 1.2
40 0.5 0.6 0.85 1.1
50 0.6 0.85 1.1
63 0.8 1
80 1
100
125
Short circuit selectivity characteristic D towards NZM*)
PLHT NZM...1-A gL/gG
I
n
[A] 40 50 63 80 100 125
50
63
80
100
no selectivity
Short Circuit Selectivity PLHT towards NZM 2
In case of short circuit, there is selectivity between the miniature circuit breakers PLHT and the upstream NZM up to the specified values of the selectivity limit
current I
s
[kA] (i. e. in case of short-circuit currents I
ks
under I
s
, only the MCB will trip, in case of short circuit currents above this value both protective devices
will respond). Overload and short-circuit release unit NZM at max. value.
*) basically in accordance with EN 60898-1 D.5.2.b
Short circuit selectivity characteristic C towards NZM*)
PLHT NZM...2-A gL/gG
I
n
[A] 40 50 63 80 100 125 160 200 250
20 0.3 0.4 0.5 0.75 0.9 1.25 1.8 2.5 3.5
25 0.3 0.4 0.5 0.7 0.9 1.2 1.7 2.4 3.3
32 0.4 0.5 0.7 0.85 1.2 1.65 2.3 3.2
40 0.5 0.6 0.85 1.1 1.5 2.1 2.9
50 0.6 0.85 1.1 1.5 2 2.8
63 0.8 1 1.4 1.8 2.5
80 1 1.4 1.8 2.4
100 1.3 1.7 2.3
125 1.6 2.1
Short circuit selectivity characteristic D towards NZM*)
PLHT NZM...2-A gL/gG
I
n
[A] 40 50 63 80 100 125 160 200 250
50 1 1.4 2.6
63 1 1.3 2.3
80 2.1
100
no selectivity