Siemens 3AH3 Instruction Manual page 54
Vacuum circuit breaker operator modules 4.16 kv to 38 kv
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Also See for 3AH3:
- Operating instructions manual (27 pages) ,
- Operating instructions manual (64 pages)
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Table 12:Type 3AH vacuum circuit breaker ratings (historic "constant MVA" ratings basis) (continued)
Short-circuit
(at rated
maximum
design
voltage)
Circuit breaker
(I)
3, 4, 8
type
kA rms sym
5-3AH-250,
29
5-3AHc-250
5-3AH-350,
41
5-3AHc-350
7-3AH-500
33
15-3AH-500
18
15-3AH-750
28
15-3AH-1000
37
38-3AH-1500
21
54
Permissible
Interrupting
tripping delay
time
9
(y)
ms / cycles
Sec
83 / 5
2
83 / 5
2
83 / 5
2
83 / 5
2
83 / 5
2
83 / 5
2
83/5
2
Rated
maximum
Maximum
design
symmetrical
voltage (V)
interrupting
divided by K
(K x I)
5
(= V/K)
kA rms
kA rms sym
3.85
36
4.0
49
6.6
41
11.5
23
11.5
36
11.5
48
23.0
35
Short-time
current (I)
Closing and latching
(three
(momentary)
seconds)
Asymmetrical
(1.6 x
kA rms
K x I)
6
kA rms
36
58/78
10
49
78
41
66/77
10
23
37/58
10
36
58/77
10
48
77
35
56
Peak
(2.7 x
K x I)
6
kA peak
97/132
10
132
111/130
10
62/97
10
97/130
10
130
95
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