Maintenance
Figure 37: Typical vacuum interrupter contact life curves (continued)
Load graph "B" vacuum interrupter type VS-17040
40
Note: Right-hand vertical segment of curve is located at the maximum symmetrical
interrupting current rating of the circuit breaker, as indicated in Table 3: Typical
vacuum interrupter contact life and stroke on page 44.
28
100,000
50,000
20,000
10,000
5,000
2,000
1,000
500
200
100
50
20
10
Permissible operating cycles
Breaking current (symmetrical value)
1 2 5
100
10
20 31.5
46
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