Figure 9.8 I.e.c. Class C Curve (Extremely Inverse): C3 - Sel -351S Instruction Manual

9.14 Setting the Relay
Time-Overcurrent Curves
100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
1
.9
.8
.7
.6
.5
.4
.3
.2
.1
.09
.08
.07
.06
.05
.04
.03
.02
.01
.5 .6 .7 .8 .9 1

Figure 9.8 I.E.C. Class C Curve (Extremely Inverse): C3

SEL-351S Relay
2 3 4 5 6 7 8 9
Multiples of Pickup
Instruction Manual
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.05
6000 (5000)
3000 (2500)
1500 (1250)
600 (500)
300 (250)
150 (125)
60 (50)
30 (25)
15 (12.5)
6 (5)
3 (2.5)
Date Code 20080103