9-6
Setting the Relay
Date Code 20010625
SEL-311L Instruction Manual
Figure 9.8: I.E.C. Class C Curve (Extremely
Inverse): C3
Figure 9.9: I.E.C. Long-Time Inverse Curve:
C4
10
20
30
40
50
60
70
80
90
100
1
2
3
4
5
6
7
8
9
.1
.2
.3
.4
.5
.6
.7
.8
.9
.01
.02
.03
.04
.05
.06
.07
.08
.09
100
1
2
3
4
5 6 7 8 9
.5 .6 .7 .8.9
90
80
70
60
50
40
30
20
10
T
im
e in
Se
co
nds
Ti
m
e i
n
C
yc
les 60 H
z
(5
0H
z)
6000 (5000)
3000 (2500)
1500 (1250)
600 (500)
300 (250)
150 (125)
60 (50)
30 (25)
15 (12.5)
6 (5)
3 (2.5)
DWG. M300G153
Multiples of
Pickup
0.05
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
Figure 9.10: I.E.C. Short-Time Inverse Curve:
C5
Summary of Contents for SEL-311L
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