Technical data

39
©1995 Square D—All Rights Reserved
11/98
Overcurrent Protection STR 58U Control Unit
06313080
(*) Instantaneous
Rating In (A) 630 800/1000 1200/1600 2000 2500 3000/3200 4000/5000/6300
Maximum Threshold I = In x 28 28 24 20 14 12 10
Trip Curves
.01
.1
.02
.03
.04
.05
.06
.07
.08
.09
1
.2
.3
.4
.5
.6
.7
.8
.9
10
2
3
4
5
6
7
8
9
30
40
20
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1000
2000
3000
4000
5000
6000
7000
8000
9000
.01
.1
.02
.03
.04
.05
.06
.07
.08
.09
1
.2
.3
.4
.5
.6
.7
.8
.9
10
2
3
4
5
6
7
8
9
30
40
20
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1000
2000
3000
4000
5000
6000
7000
8000
9000
345678910 20
30 40
80 90
100
70
6050
2
0.3
0.2
0.1
Time in Seconds
10 20 30 4056789 5060
70 80
90
432
.5 .6 .7 .8.9
1 1.5
100
x Ir x In
1.2
345678910 20
30 40
80 90
100
70
6050
2
10 20 30 4056789 5060
70 80
90
432
.5 .6 .7 .8.9
1 1.5
100
1.2
Instantaneous Pickup
I = 2 x In Max (*)
I t OFF
I t ON
Short-time Pickup
Im = 1.5–10 x (Ir)
0.3
0.2
0.1
0.4
Current Setting:
STR 58U = 0.4–1 x Sensor Rating
STR 58UP = 0.8–1 x Plug Rating
2
2
Instantaneous Dial
Settings
800/1000 A
H1: 2–4–8–12–14–19–22–Off
H2: 2–4–8–12–14–19–22–Max.
1200/1600 A
H1: 2–4–8–12–14–17–22–Off
H2: 2–4–8–12–14–17–22–Max.
2000 A
H1: 2–4–8–10–12–14–17–Off
H2: 2–4–8–10–12–14–17–Max.
2500 A
H1: 2–4–6–8–10–12–12–Off
H2: 2–4–6–8–10–12–12–Max.
3000/3200 A
H1: 2–4–6–8–10–10–10–Off
H2: 2–4–6–8–10–10–10–Max.
4000/5000/6300 A
H1: 2–4–6–8–8–8–8–Off
H2: 2–4–6–8–8–8–8–Max.