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Gas Pressure Gauge
and Fill Valve (Standard)
The pressure gauge is a “GO-NO-GO” style which
is color coded to simplify verification of proper operating
conditions. A Schraeder type fill valve permits refilling
in the field. The gauge and fill valve are made of brass
for corrosion resistance. Both components are protected
by a steel guard.
Viewing Windows
provide a means to visibly verify switch contact position.
Single phase or three phase contact viewing is available.
Padmount Enclosures
(optional) are available if tamper-resistant or outdoor padmount
construction is required around conventional vault style switchgear.
Enclosures are made of 12 gauge mild steel with a corrosion-resistant
green paint finish. Enclosures are typically shipped factory
assembled.
Key Interlocks
(optional) may be used as an added safety measure to prevent
operation by unauthorized personnel or to assure safe coordination
of energized equipment. Switches can be pro-vided with
provisions only (two maximum per operating mechanism) or with
keylocks factory installed. Specify locking scheme when
ordering, i.e. lock in open, lock in closed or lock in both
open and closed position. For keylocks to be coordinated
with other equipment, manufacturer’s information must
be provided.
Ground Lugs
(optional) are bronze, eyebolt style for 4/0 maximum conductor
cable.
Auxiliary Switches
(optional) can be mounted adjacent to each external operating
mechanism to permit remote indication of switching position.
One N.O. and one N.C. form C contact is provided for
wiring by the customer. A maximum of two auxiliary switches
can be installed per operating mechanism.
Low SF6 Remote Monitoring
Device (optional):
1) Low Pressure Warning Devices are factory set at 5 psig
and permit remote indication of internal tank pressure. One
N.O. and one N.C. form C contact is provided for wiring by
the customer. Recommended for installations where ambient
temperature does not fall below 0°F (-15°C).
2) SF6 Density Switches permit remote
indication of internal tank gas density to assure proper pressure/temperature
operating conditions. One N.O. and one N. C. form C
contact is provided for wiring by the customer. Recommended
for installations where ambient temperatures fall below 0°F
(-15°C).
3) Temperature compensated gas density gauges measure internal tank gas density for maximum precision of switch operating pressure. The gauge is color coded to simplify reading by operating personnel.
3-1/C, 600A Quik-Change
Disconnectable Bushings
Cable entrance bushings can be damaged at any time due to
improper handling, accidental shifting during shipment, elbow
failure or even normal wear and tear. In the case of
SF6 gas insulated switches where the tank is totally welded,
conventional bushing replacement means sending the switch
back to the factory for repair. G&W’s exclusive
Quik-Change Disconnectable Bushing permits quick, easy field
replacement without having to open the switch tank.
3-1/C, 600A Apparatus
Bushings
Bushings are designed to ANSI/IEEE 386 standards with standard
interface accepting conventional elbow style connectors and
include an aluminum conductor with 5/8 "-11 aluminum
threaded stud and aluminum single hole pad (elbows must be
ordered separately). Copper studs and welded flange
bushings are available. For bottom entry switches, recommended
switch frame height is 42" for all voltages. Welded
flange bushings are available.
3-1/C, 600A Voltage Sensing Apparatus Bushings
3-1/C, 200A Deepwell
Bushings
Bushings are designed to ANSI/IEEE 386 standards with standard
interface accepting deadbreak or load break inserts and conventional
elbow connectors (inserts and elbows must be ordered separately).
A copper conductor with copper single hole pad is standard.
For bottom entry switches, recommended switch frame
height is 42" for all voltages. Welded flange bushings
are available.
3-1/C, 600A Apparatus
Bushings
Welded Flange Style
Bushings
are designed to ANSI/IEEE 386 standards with standard interface
accepting conventional elbow style connectors. Bushings
include a stainless steel flange and an aluminum conductor
with 5/8 "-11 aluminum threaded stud. Elbows must
be ordered separately. 200A deepwell welded flange available.
3-1/C, 600A Universal
Bushings
The Universal Apparatus Bushing can be installed on virtually
any type of padmount or submersible equipment providing a
direct connect point for the U-Splice module. The combination
U-Splice and apparatus bushing provides an extremely versatile
interface between cable and equipment for easy connecting,
disconnecting, and isolating of distribution cable circuits.
Straight-in or 90 degree cable entry to equipment provides
versatility important for applications with a minimum of space
available. End caps for both bushing and splice module
permit dead-ending of the cable and equipment for fast cable
sectionalizing if required.
Universal bushings are designed to accept
G&W universal bushing cable ends. An aluminum conductor
and aluminum single hole pad is standard. For bottom entry
switches, recommended switch frame height is 36" for
all voltages. Hi-pot test kits are available.
NOTE: Universal bushings can accept
up to two G&W Universal bushing cable ends per phase.
For applications requiring this feature, consult factory.
| Switch Options |
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Stainless steel tank |
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Stationary controls |
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Stainless steel enclosure |
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Low pressure warning device |
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SF6 density switch |
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Temperature compensated gas density gauge |
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Overpressure relief device |
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4/0 brass ground lug |
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Keylock provisions |
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Keylocks to lock in open position |
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Current transformers for current monitoring
on automation schemes (600:5) (500:1) (1000:1) |
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Automatic transfer control |
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24VDC motor actuators |
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Auxiliary switches |
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Switch controls |
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Remote terminal units |
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Operations counter |
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200A deepwell bushings |
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200A deepwell bushings with deadbreak
insert |
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600A apparatus bushings |
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600A Voltage Sensing bushings |
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600A Quik-Change apparatus bushings |
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600A Universal bushings (through 25kV) |
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Type 2 vacuum interrupter control |
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Type 3 vacuum interrupter control |
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External trip/power for vacuum interrupter
control |
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