8.10
SEL-351S Relay Instruction Manual Date Code 20080103
Breaker Monitor, Metering, and Load Profile Functions
Breaker Monitor
Figure 8.6 Breaker Monitor Accumulates 50 Percent Wear
10,000
100%
1000
2
3
4
5
6
7
8
9
100
2
3
4
5
6
7
8
9
10
2
3
4
5
6
7
8
9
123456789
50
40
30
20
10
.5
Number of Close/Open Operations
kA Interrupted per Operation
25%
50%