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Figure 37: Typical vacuum interrupter contact life curves (continued)
Load graph "B" vacuum interrupter type VS-17040
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.
Permissible operating cycles
100,000
50,000
20,000
10,000
5,000
2,000
1,000
500
200
100
50
20
10
46
1
2
5
10
Breaking current (symmetrical value)
28
20
31.5
40
100
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