Masterpact ® circuit breaker
time cu rrent curves
overcurrent protection STR 58U
1 0000.5 .6 .7 .8 .9 1 1.2 1.5
2
3
4 5 6 7 8 9 1 0
20
30 40
9000
8000
7000
6000
5000
4000
3000
current setting
2000
lr
=
0.8 ... 1 x plug rating
1000
900
BOO
700
600
500
400
300
200
100
90
BO
70
60
50
40
30
20
1 0
9
B
7
6
5
0
so so R: g g �
4
short-time pickup
lm
=
1 .5 ... 10 x (lr)
3
2
1
.9
B
7
.6
5
4
.3
2
12t OFF
1
09
OB
07
.06
'
.05
instantaneous pickup
·
.04
I = 2
x ln ... Max (*)
.03
I
'
�
02
.01
5 6 .7 .8.9 1 1 2 1 5 2
3
4 5 6 7 8 9 10
20
30 40 so so R ii: g §
� - -
x l r
Max (*)
rating
In (A)
630
800/1 000
1 200/1600
fixed threshold
I = In x .. .
28
28
24
3
4 5 6 7 8 9 1 0
20
30
0
40 so so f2 � g s
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
BOO
700
600
500
400
300
'
200
100
90
BO
70
60
50
40
30
I
20
1 0
9
B
'
7
6
5
3
2
1
9
B
.7
.5
.4
2
. 1
.09
.OB
.07
.06
05
.04
03
02
.01
2
3
4
5 6 7 8 9 1 0
20
30 40 50 60 f2 g g g
X In
M P 1 01 2A.O
2000
2500
3000/3200
4000/5000/6300
20
1 4
1 2
1 0
25
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