37
Load graph "B" vacuum interrupter type VS-15052
Load graph "D" vacuum interrupter types VS-30030 and VS-30041
Load graph "F" vacuum interrupter type VS-17085
Figure 21: Typical vacuum interrupter contact life curves (continued)
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
50 100
10
20
63
D B F
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.
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