Technical information

2/5
1SDC210033D0202
TMD
Main characteristics:
Q available for XT1 and XT3 in the three-pole and four-pole versions;
Q protections:
– against overload (L): adjustable protection threshold from 0.7...1xIn, with inverse long-time
trip curve;
– against instantaneous short-circuits (I): fi xed 10xIn protection threshold, with instantaneous
trip curve;
Q 100% neutral protection in four-pole circuit-breakers. 50% neutral protection is only available for
In*125A;
Q the thermal protection setting is made by turning the relative cursor on the front of the release.
Circuit-breakers for power distribution
Thermomagnetic trip units
XT1
TMD
Breaking capacity B B B,C B,C,N B,C,N ALL ALL ALL ALL ALL ALL
In [A] 16 20 25 32 40 50 63 80 100 125 160
Neutral [A] - 100% 16 20 25 32 40 50 63 80 100 125 160
I
1
= 0.7…1xIn
Neutral [A] - 50%
–––––––––
80 100
I
3
[A] 450 450 450 450 450 500 630 800 1000 1250 1600
Neutral [A] - 100% 450 450 450 450 450 500 630 800 1000 1250 1600
I
3
= 10xIn
Neutral [A] - 50%
–––––––––
800 1000
XT3
TMD
In [A] 63 80 100 125 160 200 250
Neutral [A] - 100% 63 80 100 125 160 200 250
I
1
= 0.7…1xIn
Neutral [A] - 50%
–––
80 100 125 160
I
3
[A] 630 800 1000 1250 1600 2000 2500
Neutral [A] - 100% 630 800 1000 1250 1600 2000 2500
I
3
= 10xIn
Neutral [A] - 50%
–––
800 1000 1250 1600
Rotary switch for thermal
protection setting
Example with XT3 250A