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PowerPact H-, J-, and L-Frame Circuit Breakers
Trip Curves
257
02/2016
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All Rights Reserved
Figure 134: L-Frame UL Listed Current-Limiting Circuit Breaker
20000 30000 40000 50000 60000 70000 80000 90000
100000 150000 200000
10000
2
1
3
4
5
Availability (RMS Symmetrical Amperes)
I
2
t
*
Based on maximum values obtained throughout the circuit breaker development and UL test programs.
Maximum* Let-Through I
2
t (Amperes
2
Seconds x 10
6
)
240 V 3Ø
600 V 3Ø
480 V 3Ø
(/(&7521,&02/'('&$6(&,5&8,7%5($.(56
32:(53$&7/²)5$0(&855(17/,0,7,1*&,5&8,7%5($.(56
$)5$0($7$1'9
/-//$1'/5³$
/(77+528*+O

W
Figure 135: L-Frame Circuit Breaker Reflex Tripping
5
20
10
8
7
6
4
3
2 3 4 6 10 20 30 40 60 100 200
t
(ms)
L-Frame 600 A
L-Frame 400 A
I (kA RMS)