Siemens 3AH3 - Lubrication for Special Conditions

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