Siemens 3AH Instructions, Installation, Operation, Maintenance - Page 31
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Appendix
Table A-1b
Type 3AH Circuit Breaker Ratings (New "Constant kA" Rating Basis)
ANSI C37.04-1999
Standard Rating Structure for AC High-Voltage Circuit Breakers
ANSI C37.06-2000
AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis- Preferred Ratings and Related Required Capabilities
ANSI C37.09-1999
Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
ANSI C37.010-1999
Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
Rated Values
Maximum Design Voltage ( V )
(2)
Voltage Range Factor ( K )
Power Frequency
Withstand
Voltage Levels
Lightning
Impulse (BIL)
Continuous
(3)
Short-Circuit ( I )
(4)
(5)
Interrupting Time
Permissible Tripping Delay ( Y )
Max. Sym Interrupting ( I )
% dc Component
Short-Time Current ( I ) (3 seconds)
Closing & Latching (Momentary)
Asymmetrical ( 1.55 x I )
Closing & Latching (Momentary)
Peak ( 2.6 x I )
Footnotes
1.
Maximum voltage for which the circuit breaker is designed, and the upper limit for operation.
2.
K is listed for informational purposes only. For circuit breakers rated on a "kA basis", the Voltage Range Factor is 1.0.
3.
3000FC indicates that fan cooling may be required in the switchgear structure to achieve this rating.
4.
All values apply to polyphase and line-to-line faults.
5.
Standard duty cycle is O - 0.3s - CO - 15s - CO.
Units
5-3AH-
31
4.76
(1)
kV rms
——
1.0
19
kV rms
kV crest
60
1200
A rms
2000
kA rms
31.5
sym
ms
83
Cycles
5
2
Sec
kA rms
31.5
sym
47
%
kA rms
31.5
kA rms
49
kA peak
82
5-3AH-
5-3AH-
7-3AH-
15-3AH-
40
50
40
20
4.76
4.76
8.25
15.0
1.0
1.0
1.0
1.0
19
19
36
36
60
60
95
95
1200
1200
1200
1200
2000
2000
2000
2000
3000FC
3000FC
3000FC
40
50
40
20
83
83
83
83
5
5
5
5
2
2
2
2
40
50
40
20
47
47
47
47
40
50
40
20
62
78
62
31
104
130
104
52
Circuit Breaker Type
15-3AH-
15-3AH-
15-3AH-
15-3AH-
25
40
31
50
15.0
15.0
15.0
15.0
1.0
1.0
1.0
1.0
36
36
36
36
95
95
95
95
1200
1200
1200
1200
2000
2000
2000
2000
3000FC
3000FC
25
31.5
40
50
83
83
83
83
5
5
5
2
2
2
25
31.5
40
50
47
47
47
47
25
31.5
40
50
39
49
62
78
65
82
104
130
38-3AH-
27-3AH-
25
31.5
27.0
38.0
1.0
1.0
60
80
125
150
1200
1200
2000
2000
3000FC
3000FC
25
31.5
83
83
5
5
5
2
2
2
25
31.5
47
47
25
31.5
39
49
65
82
31