Bulletin 1489-A
Circuit Breaker
Product Description
Time Current Curve – 1-, 2-, and 3-Pole Circuit Breaker
0
Time-Current Characteristic Bulletin 1489
Type C and D
Ambient Temperature 40 °C
1
7200
3600
2
Tripping characteristic
acc. to UL 489
2
1
Conventional non-tripping current
Int = 1.0 IN (T=40 °C)
1
2
1200
600
3
Conventional tripping current
It = 1.35 IN : t < 1 h (T=25 °C)
300
3
4
3
2.0 IN : t = 12- 120 s (T=25 °C)
120
60
30
instantaneous tripping
acc. to IEC 60898-1
5
10
5
3
4
5
Type C: 5 IN : t > 0.1 s
10 IN : t < 0.1 s
6
Type D: 10 IN : t > 0.1 s
20 IN : t < 0.1 s
2
1
7
0.5
0.2
4
5
0.1
8
4
5
0.05
C
D
0.02
0.01
9
0.005
10
11
12
13
0.002
0.001
0.0005
1
2
3
4
5
6
7
8 9 10
15
20
30
40 50
I / I N
www.ab.com/catalogs
Preferred availability cat. nos. are bold.
7-19
Publication A117-CA001A-EN-P
ROCKWELL [ ROCKWELL INTERNATIONAL CORPORATION. ]
