Bulletin 1492-MC
Circuit Breaker
Product Description
Time Current Curve – 2-Pole Circuit Breakers
0
Time Current Curve
1492-MCAA2NN 1492-MCAA2HNN 1492-MCEA2NN
1492-MCBA2NN 1492-MCBA2HNN 1492-MCGA2NN
1
2-pole Circuit Breakers
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING
10,000
5,000
10,000
5,000
— 40ºC Ambient
2
— 4 ft 60º/75ºC Wire per Terminal
— Open Air
3,000
2,000
3,000
2,000
— Current in All Poles
3
1,000
500
1,000
500
4
300
200
300
200
100
50
100
50
5
30
20
30
20
6
Minimum
Maximum
10
5
10
5
7
3
2
3
2
1
1
8
.5
.5
.3
.2
.3
.2
9
.1
.1
10
11
12
13
.05
.05
.03
.02
.03
.02
Maximum Interrupting Time
.01
.01
.005
.005
.003
.002
.003
.002
.001
.001
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING
www.ab.com/catalogs
Preferred availability cat. nos. are bold.
7-9
Publication A117-CA001A-EN-P
ROCKWELL [ ROCKWELL INTERNATIONAL CORPORATION. ]
