Schweitzer Engineering Laboratories SEL-311C - Breaker Monitor Output; Figure 8.7 Breaker Monitor Accumulates 100 Percent Wear

8.11
Date Code 20060320 Instruction Manual SEL-311C Relay
Breaker Monitor and Metering Functions
Breaker Monitor
Figure 8.7 Breaker Monitor Accumulates 100 Percent Wear
Breaker
Monitor Output
When the breaker maintenance curve for a particular phase (A, B, or C)
reaches the 100 percent wear level (see Figure 8.7), a corresponding Relay
Word bit (BCWA, BCWB, or BCWC) asserts.
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
50%