Speedfax 2017

Medium-voltage Equipment
Type GMSG Vacuum Circuit Breaker Ratings
Selection
Type GMSG and GM-SG-AR Circuit Breaker Ratings (New “Constant kA” Ratings Basis)
These ratings are in accordance with the following standards:
n ANSI/IEEE C37.04-1999 Standard Rating Structure for AC High-Voltage Circuit Breakers
n ANSI C37.06-2009 AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis - Preferred Ratings and Related
Required Capabilities for Voltages Above 1,000 Volts
n ANSI/IEEE C37.09-1999 Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
n ANSI/IEEE C37.010-1999 Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
Circuit Breaker Type a
Rated Values
Units
5-GMSG-
40-
xxxx-104
5-GMSG-
50-
xxxx-130
5-GMSG-
63-
xxxx-164
7-GMSG-
40-
xxxx-104
15-GMSG-
25-
xxxx-65
15-GMSG-
40-
xxxx-104
15-GMSG-
50-
xxxx-130
15-GMSG-
63-
xxxx-164
Maximum Design Voltage (V) b kV rms 4.76 4.76 4.76 8.25 15.0 15.0 15.0 15.0
14
SWITCHGEAR
Voltage Range Factor (k) c — 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
Withstand
Voltage Levels
Power
Frequency
Lightning
Impulse (BIL)
kV rms 19 19 19 36 36 36 36 36
kV crest 60 60 60 95 95 95 95 95
Continuous d
A rms
1,200
2,000
3,000
4,000FC
1,200
2,000
3,000
4,000FC
1,200
2,000
3,000
4,000FC
1,200
2,000
3,000
4,000FC
1,200
2,000
1,200
2,000
3,000
4,000FC
1,200
2,000
3,000
4,000FC
1,200
2,000
3,000
4,000FC
Short-Circuit (I) ef kA rms sym 40 50 63 40 25 40 50 63
Interrupting Time g
ms
cycles
83
5
83
5
83
5
83
5
83
5
83
5
83
5
83
5
Permissible Tripping Delay (y) Sec 2 2 2 2 2 2 2 2
Maximum Symmetrical
Interrupting (I)
kA rms sym 40 50 63 40 25 40 50 63
% dc Component % 47 47 47 47 47 47 47 47
Short-Time Current (I)
(Three Seconds)
Closing and Latching
(Momentary)
Asymmetrical
(1.55 x I)
kA rms 40 50 63 40 25 40 50 63
kA rms 62 78 98 62 39 62 78 98
Closing and Latching
(Momentary)
Peak
(2.6 x I)
kA peak 104 130 164 104 65 104 130 164
a “xxxx” in type designation refers to the continuous current rating 1,200 A, 2,000 A,
or 3,000 A, as appropriate. The 4,000 A fan-cooled rating is achieved using a 3,000 A
circuit breaker, in combination with fan cooling as indicated in Footnote 4.
b Maximum design voltage for which the circuit breaker is designed, and the upper
limit for operation.
c K is listed for informational purposes only. For circuit breakers rated on a “constant
kA basis”, the voltage range factor is 1.0.
d 4,000FC indicates that fan cooling is included in the switchgear structure for this
rating. 4,000 A rating is not available in outdoor equipment.
e All values apply to polyphase and line-to-line faults.
f Standard duty cycle is O - 0.3s - CO - 3 min. - CO.
g Standard rated interrupting time is five cycles (83 ms)/Optional rated interrupting
time of three cycles (50 ms) 63 kA is available (except with 24 Vdc tripping).
14-8
Siemens Industry, Inc. SPEEDFAX Product Catalog