Short-Time Current, kA rms Sym
[
12
][
12
][
10]
[Short-Circuit interrupting Current,
kA rms Sym
[
12
][
12
][
12]]
Switched ways shall be rated for the required continuous and load
interrupting current.[ Short-circuit interrupting current rating applies
to fault interrupting switched ways only.]
2.1.2
Switchgear Construction
**************************************************************************
NOTE:
For LANTDIV projects select "three position
switch: Open, Closed, Ground."
**************************************************************************
Switch contacts and cable entrance terminations shall be contained in an
SF6 filled stainless steel tank. Switchgear shall be shipped factory filled
with SF6 gas conforming to ASTM D 2472. Switchgear shall be configured
with[ load interrupting][ and][ fault interrupting] switched ways as
indicated. Switchgear shall have front accessible terminations suitable
for cables entering from below[ with the manual operating provisions
mounted on the rear].[ Switch contact positions for switched ways shall be
visible through viewing windows in the SF6 tank located adjacent to the
manual operating provisions.] Provide gas pressure gage in viewable
location from switch operating handle. Each switched way shall have [three
position switch; Open, Closed, Ground][provisions for grounding].
2.1.2.1
Pad-mounting Provisions
**************************************************************************
NOTE: Choose stainless steel enclosure where
environmental conditions are not suitable for mild
steel or where a higher level of corrosion
protection is desired. Select ANSI C57.12.29 when
enclosure is required to be stainless steel.
**************************************************************************
Provide [non-]enclosed switchgear suitable for installation on a concrete
pad. Switchgear[ support frame][ enclosure base][ enclosure] shall be
fabricated of ASTM A 167 type 304 or 304L stainless steel.[ Enclosure base
shall include any part of the switchgear enclosure that is within 75 mm 3
inches of concrete pad.] Paint [switchgear tank and support
frame][enclosure including base] ASTM D 1535 Munsell 7GY3.29/1.5 green.
Paint coating system shall comply with [NEMA C57.12.28][ANSI C57.12.29]
regardless of equipment material.
[2.1.3
Load Interrupting Switched Ways
Load interrupter switched ways shall provide[ single-pole][ three-pole
group operated] switching[ as indicated].
][2.1.4
Fault Interrupting Switched Ways
**************************************************************************
NOTE: 1. Do not provide switchgear units configured
with fault interrupting switched ways where the
system available fault current is greater than
16,000 rms symmetrical amperes.
SECTION 16341N
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