Siemens 3AH3 Instruction Manual page 51

Table 11: Type 3AH vacuum circuit breaker ratings (new "constant kA" ratings basis)
Maximum
design
voltage (V)
Circuit breaker
type
kV rms
5-3AH-31.5 4.76
5-3AH-40 4.76
5-3AH-50 4.76
5-3AH-63 4.76
7-3AH-40 8.25
15-3AH-20 15.0
15-3AH-25 15.0
15-3AH-31.5 15.0
15-3AH-40 15.0
15-3AH-50 15.0
15-3AH-63 15.0
15.5-3AH-20 15.5
15.5-3AH-25 15.5
15.5-3AH-31.5 15.5
15.5-3AH-40 15.5
27-3AH-20 27.6
27-3AH-25 27.6
38-3AH-20 38.0
38-3AH-25 38.0
38-3AH-31.5 38.0
38-3AH-40 38.0
Withstand voltage
levels
Voltage
1
range
Lightning
factor
Power
(K)
2
frequency
kV rms
1.0 19
1.0 19
1.0 19
1.0 19
1.0 36
1.0 36
1.0 36
1.0 36
1.0 36
1.0 36
1.0 36
1.0 50
1.0 50
1.0 50
1.0 50
1.0 60
1.0 60
1.0 80 150/200
1.0 80 150/200
1.0 80 150/200
1.0 80 150/200
Continuous
current
7
impulse
A rms
(BIL)
kV crest
60 1,200, 2,000
1,200, 2,000,
60
3,000
1,200, 2,000,
60
3,000
1,200, 2,000,
60
3,000
1,200, 2,000,
95
3,000
95 1,200, 2,000
95 1,200, 2,000
1,200, 2,000,
95
3,000
1,200, 2,000,
95
3,000
1,200, 2,000,
95
3,000
1,200, 2,000,
95
3,000
110 1,200, 2,000
110 1,200, 2,000
110 1,200, 2,000
1,200, 2,000,
110
3,000
150 1,200, 2,000
150 1,200, 2,000
1,200, 2,000
6
1,200, 2,000
6
1,200, 2,000,
6
3,000
1,200, 2,000,
6
3,000
These ratings are in
Short-circuit
accordance with:
(I)
3,4
ANSI/IEEE C37.04-1999
Standard Rating Structure
kA rms sym
for AC High-Voltage Circuit
Breakers
ANSI/IEEE C37.06-2009 AC
31.5
High-Voltage Circuit
Breakers Rated on a
40
Symmetrical Current Basis -
Preferred Ratings and
50
Related Required
Capabilities for Voltages
63
Above 1,000 Volts
ANSI/IEEE C37.09-1999
40
Standard Test Procedure
for AC High-Voltage Circuit
20
Breakers Rated on a
Symmetrical Current Basis
25
ANSI/IEEE C37.010-1999
31.5
Application Guide for AC
High-Voltage Circuit
40
Breakers Rated on a
Symmetrical Current Basis.
50
Footnotes:
Maximum design voltage for
1.
63
which the circuit breaker is
designed and the upper limit for
operation.
20
K is listed for information
2.
purposes only. For circuit
25
breakers rated on a "constant kA"
ratings basis, the voltage range
31.5
factor is 1.0.
All values apply to polyphase and
3.
line-to-line faults.
40
Standard duty cycle is O - 0.3 s -
4.
CO - 3 min. - CO.
20
Standard rating interrupting time
5.
is five-cycles (83 ms). Optional
rated interrupting time of three-
25
cycles (50 ms) is available
(except with 24 Vdc tripping).
20
150 kV BIL is for drawout
6.
applications. 200 kV BIL is for
type SDV6 with appropriate
25
construction.
Continuous current capability
7.
31.5
may be increased by the use of
forced-cooling (fan-cooling) in
40
the switchgear together with
increased bus bar capacity.
51