Schweitzer Engineering Laboratories SEL-587Z - Figure 3.21 U.S. Short-Time Inverse Curve: U5

3.23
Date Code 20020903 SEL-587Z Instruction Manual
Relay Elements
Overcurrent Protection
Figure 3.21 U.S. Short-Time Inverse Curve: U5.
0.50
1
.00
2
.00
6.00
3.00
4
.00
8.00
12
.00
1
5.00
.01
.5
.6
.7
.8
1
.9
.02
.03
.04
.05
.06
.1
.08
.09
.2
.3
.4
.5
1
.7
.9
2
3
4
5
6
7
8
10
9
20
30
50
40
60
100
90
80
80
9
2
3
4
5
6
7
8
1
0
2
0
30
4
0
50
60
7
0
90
1
00
T
im
e
in
Seco
n
ds
T
ime in C
y
cles 60 Hz (50Hz)
3
(
2.5
)
6
(
5
)
15
(
12.5
)
60
(
50
)
30
(
25
)
150
(
125
)
300
(
250
)
1500
(
1250
)
600
(
500
)
3000
(
2500
)
6000
(
5000
)