|
G&W offers a variety of different overhead
switches for 15.5 through 38 kV overhead systems. Switches
are available for either direct pole or crossarm mounting,
and can be operated either manually or through various remote
control, SCADA or automatic transfer control packages. Various
styles are available depending upon system rating requirements.
Load
break with 20kA asymmetrical momentary
Rotary Puffer style load break switches.
Load
break with 40kA asymmetrical momentary
Linear Puffer style load break switches.
G&W's Solution Advantage
Maximum operator safety —
G&W overhead switches are designed with all critical contact
components totally protected from the environment within a
sealed, SF6 insulated tank. SF6 is a nontoxic, nonflammable
dielectric with excellent arc quenching properties. Contact
position indicators clearly identify contact position. External
switch operators can be padlocked for tamper-resistance. Electronic
controls can automatically prohibit operation if the gas pressure
falls below proper operating levels. The result is maximum
operator safety.
Minimal maintenance
— G&W SF6 puffer switches are factory filled, hermetically
sealed and production tested according to applicable ANSI
and IEC standards. Checking the pressure gauge is all that
is required prior to operation.
Bushing flexibility
— G&W offers a variety of bushing styles to accommodate
specific user requirements. Bushing styles include porcelain,
elastomeric and an exclusive porcelain over epoxy bushing
with integral voltage sensor for automation or automatic transfer
applications.
Compared
to Air Break Switches
G&W SF6 switches can provide:
|
 |
An economical alternative with superior
performance. |
|
Totally sealed contact systems eliminating
environmental corrosion and icing concerns. |
|
Significant increase in
load break performance especially important in automation
schemes where the number of switching operations typically
increases. |
|
Longer service life |
|
Minimal maintenance |
|
Ease of automation |
|
