Specifications

Operations – Example Time Current Curve
Type SB BreakerFrame Time Current Curve
19
Example: 2000A
Amperes in Multiples of Rating Plug Value (I
n
)
Time in Seconds
Time in Seconds
1 Cycle 1 Cycle
SYSTEM
CHECK
Continuous
Long
Time
Delay
Instantaneous
Pickup
xl
1000A
n
10
1.5
2
3
4
5
6
7
8
9
100
50
60
65
70
75
80
85
90
95
30
2.5
4
5.5
8
10
14
17
21
25
Secs
@6 x l
n
SIEMENS
Short
Time
Delay
Secs
@8 x l
n
.3
.07
.1
.15
.2
.3
.07
.1
.15
.2
I
2
t
Fixed
xl
n
Short
Time
Pickup
9
1.5
2
2.5
3
4
5
6
7
8
Ground
Fault
Delay
.5
.1
.2
.3
.4
.5
.1
.2
.3
.4
I
2
t
Fixed
MAX RATING
= 2000A
Ground
Fault
Pickup
60
20
23
27
30
35
40
45
50
55
lg=
%
Secs
@
n
I =%I
r
MAX
RATING
Rating Plug
l
n
= 1000A
Rating Plug
Curve
Adjustments