Siemens GM-SG

Installation
Installing
Shipping
Sections
The
proper
method
of
installation
depends
on
whether the
switchgear
has been
shipped
as one
complete
group
,
or
in
two
or more
shipping
sections
.
The
general
arrangement
drawings
will
indicate the
shipping
sections
,
cubicle numbers and their
location
within
the
switchgear
lineup
.
Sections
are
assembled
and wired
in
accordance
with
the
arrangement
as
in
the
final
installation
.
Before
setting
and
erecting
the cubicles
,
determine the
correct
location
of
each
shipping
group
on
the
general
arrangement
drawing
.
Sweep
the
mounting
surface
to
remove
all dirt and debris
.
If
the
transformer
must
be
positioned
first
,
conduit
couplings
should be
provided
in
the
switchgear
foundation
,
so
that the
conduits
do
not
extend
more
than
approximately
2
"
(
51
mm
)
above the
switchgear
mounting
surface
.
The
switchgear
should
be
positioned
near
the
transformer
,
and
just high enough
to
clear the
secondary
conduits
,
but low
enough
that the throat
on
the
switchgear
will
clear the
opening
in
the
transformer
terminal chamber
(
throat
)
.
When the
switchgear
is
properly
positioned
so
that the
switchgear
throat
will
fit
into the
transformer
throat
,
move
the
switchgear
toward
the
transformer
until
the
switchgear
throat extends
approximately
2
"
(
51
mm
)
into the
transformer
throat
,
and
the
switchgear
anchor bolts
and
conduits
are
correctly aligned
.
With
all
points
now
in
alignment
,
conduit
caps
and
floor
plate
conduit
covers
removed
,
carefully
lower the
switchgear
into its
permanent
position
.
After
all
leveling
and
anchoring
operations
for
the
switchgear
are
complete
,
draw the
sliding
throat
collar
of
the
switchgear
throat into
place
against
the
transformer
throat
.
Tighten
the throat hardware
only
enough
to
compress
the
gasket
.
Installing
Switchgear
with
Throat
Connection
to
Power
Transformer
When
a
transformer
is connected
to
switchgear using
a
throat connection
,
the
switchgear
should be
positioned
next to
the
transformer
as
shown
in
Figure
11
.
It
is
very
desirable
that the
switchgear
be
placed
in
position
before
positioning
the
transformer
.
Terminal
Chamber
Wall
Sliding
Collar
Switchgear
Throat
Tighten
hardware
to
draw
sliding
collar into
final
Riser
/
j
position
o o
o o
/
Access
Cover
Bus
Terminal
Chamber
Extension
Pi Pi
Gasket
Riser
f
3
o o
It
u
§
<
3
A
<
3
<
3
A
<
3
Figure
11
.
Connecting
Transformer
and
Switchgear
for
Typical
Outdoor
Installation
13
Courtesy of NationalSwitchgear.com