Speedfax 2017

Medium-voltage Equipment
Arc-Resistant Type GM-SG-AR Switchgear
General
5, 7.2 and 15 kV Drawout Metal-Clad Arc-Resistant Indoor Switchgear up to 63 kA
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SWITCHGEAR
n Arc-resistant to IEEE C37.20.7, up to
63 kA, 0.5 sec, accessibility type 2B
n Application flexible exhaust system
n Top-mounted pressure relief
channel factory-installed for reduced
installation time
n One-high or two-high construction
n Up to 100 full-fault interruptions
n Universal spare circuit breaker
n Interlocks permit insertion of higher
rated vacuum circuit breaker into
lower rated cell but not vice versa
n Front accessible circuit breaker
operating mechanism for ease of
maintenance
n Closed-door racking
n Floor rollout circuit breaker in lower
cell without a dolly
n Visible secondary disconnect
n Circuit breaker ships inside of cell,
thus reducing installation cost and
transit damage
n Instrumentation/controls located in a
separate compartment isolated from
all primary circuit elements
n Pair with Siemens protective relays
to match any typical application
n Horizontal drawout type GMSG
vacuum circuit breaker with type
3AH3 operating mechanism
n Uses the latest developments in
vacuum interrupter technology
n Highly reliable vacuum interrupters -
MTTF over 57,000 years
n Common type 3AH3 operator
platform for all ratings
n Over 120,000 type 3AH3 operators
produced since 1998
n 10,000 operations to overhaul
n Three-cycle interrupting time
(optional)
n Meets or exceeds the latest ANSI,
IEEE and NEMA standards
n UL or C-UL Listing available
Type GMSG circuit breaker ratings constant kA basis - ANSI/IEEE C37.06-2009
Historic
“MVA” class
Maximum
design
voltage kV
Rated
interrupting
rating kA
Maximum
interrupting and
short-time kA
4,000 A fan-cooled available using a 3,000 A circuit breaker together with a modified
switchgear structure incorporating fan cooling equipment.
Voltage
range
factor Continuous current Insulation levels dielectric Close & latch (kA)
rms Peak
60 Hz BIL
1.55 KI 2.6 KI
— 4.76 40 40 1.0 1,200, 2,000, 3,000 19 60 62 104
— 4.76 50 50 1.0 1,200, 2,000, 3,000 19 60 78 130
— 4.76 63 63 1.0 1,200, 2,000, 3,000 19 60 98 164
— 8.25 40 40 1.0 1,200, 2,000, 3,000 36 95 62 104
— 15.0 25 25 1.0 1,200, 2,000 36 95 39 65
— 15.0 40 40 1.0 1,200, 2,000, 3,000 36 95 62 104
— 15.0 50 50 1.0 1,200, 2,000, 3,000 36 95 78 130
— 15.0 63 63 1.0 1,200, 2,000, 3,000 36 95 98 164
Type GM-SG-AR
switchgear available as:
n Indoor (Type GM-SG-AR)
n Outdoor walk-in Shelter-Clad (Type SGM-SG-AR)
n Single-aisle
n Factory insulated and assembled aisle (optional).
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Siemens Industry, Inc. SPEEDFAX Product Catalog