Siemens 3AH3 Instruction Manual page 35

Table 3: Typical vacuum interrupter contact life expectancy
Rated maximum Interrupting class
voltage kV MVA
4.76
4.76
8.25
15.0
15.0
15.0 1,000
38.0 1,500
Rated maximum Interrupting class
voltage kV
4.76
4.76
4.76
4.76
8.25
15.0
15.0
15.0
15.0
15.0
15.0
15.5
15.5
15.5
15.5
27.6
27.6
38.0
38.0
38.0
38.0
Footnote:
Maximum symmetrical interrupting current rating of circuit breaker (refer to Tables 11 and 12).
1.
Rated short-circuit current
250 29 kA @ 4.76 kV; 36 kA @ 3.85 kV
350 41 kA @ 4.76 kV; 49 kA @ 4.0 kV
500 33 kA @ 8.25 kV; 41 kA @ 6.6 kV
500 18 kA @ 15.0 kV; 23 kA @ 11.5 kV
750 28 kA @ 15.0 kV; 36 kA @ 11.5 kV
37 kA @ 15.0 kV; 48 kA @ 11.5 kV
21 kA @ 38.0 kV; 35 kA @ 23.0 kV
Rated short-circuit current
kA
31.5
40
50
63
40
20
25
31.5
40
50
63
20
25
31.5
40
20
25
20
25
31.5
40
Vacuum
interrupter type
VS-17006
VS-17040
VS-15052
VS-15052
VS-17006
VS-15052
VS-17040
VS-15052
VS-30030
Vacuum
interrupter type
VS-17006
31.5
VS-17040
VS-15052
40
VS-17040
50 VS-15052
63 VS-17085
VS-15052
40
VS-17040
20 VS-17006
25 VS-17006
VS-17006
31.5
VS-17040
VS-15052
40
VS-17040
50 VS-15052
63 VS-17085
20 VS-25008
25 VS-25008
31.5 VS-15052
40 VS-15052
20 VS-25008
25 VS-25008
20 VS-30030
25 VS-30030
31.5 VS-30041
40 VS-30041
Right hand limit
Graph of curve (refer to
Figure 21)
1
A 36
E 36
B 49
B 41
A 23
B 36
E 36
B 48
D 35
Right hand limit
Graph of curve (refer to
Figure 21)
1
A 31.5
E 31.5
B 40
E 40
B 50
F 63
B 40
E 40
A 20
A 25
A 31.5
E 31.5
B 40
E 40
B 50
F 63
C 20
C 25
B 31.5
B 40
C 20
C 25
D 20
D 25
D 31.5
D 40
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