Siemens 5-GMI-350 - Page 7

Installation
Checks
&
Initial
Functional
Tests
Page
4
The
spring discharge
check consists
of
simply
performing
the
following
tasks
in
the order
given
.
This
check
assures
that both the
tripping
and
closing
springs
are
fully
dis
-
charged
.
1
.
Press
red
Trip
pushbutton
.
2
.
Press
green
Close
pushbutton
.
3
.
Again
press
red
Trip
pushbutton
.
4
.
Verify
Spring
Condition
Indicator
shows
CHARGED
”
5
.
Verify
Main
Contact
Status
Indicator shows
“
OPEN
.
”
Removal
from
Lower
Cell
(
Indoor
and
Shel
-
ter
-
Clad
Outdoor
Switchgear
)
After
performing
the
Spring
Discharge
Check
(
with
control
power
de
-
energized
)
,
remove
the
circuit breaker
from
its
switchgear
cubicle
.
1
.
Push the
racking
interlock latch
in
and insert the
racking
crank
on
the
racking
screw
on
the
floor of
the breaker
cell
as
shown
in
Figure
3
2
.
With
constant
pressure
on
the
racking
crank
,
rotate
counterclockwise
until
the
breaker is
Disconnect
posi
-
tion
.
3
.
Move the breaker release
latch
to
the
left
,
breaker
can
then be removed
from
cubicle
.
DIS
-
i i
4
.
The
circuit breaker
is
then
free
to
be
rolled
out
using
the
handles
as
shown
in
Figure
4
.
The
wheels
of
the circuit
breaker
are
virtually
at
floor
level
,
and
one
person
can
easily
handle
the unit
.
Removal
from
Upper
Cell
(
Indoor
and
Shelter
-
Clad
Outdoor
Switchgear
)
Removal
of
the
upper
breaker
in
a
two
-
high
assembly
is
similar
to
removal
of
a
breaker
from
a
lower
cell
,
with
several
additional
steps
.
Figure
5
shows the
two
breaker
extension
rails
that
are
inserted
into the
fixed
rails
within
the
upper
cell
of
two
-
high
switchgear
equipment
.
The
rails
engage
locking
pins
in
the
fixed
rails
to
secure
them
in
position
.
MMMMM
34
!
The
procedure
for
removal
of
an
upper
circuit
breaker is
:
1
.
Insert the
two
upper
support
rails into the
fixed
rails
.
Be
sure
rails
are
properly
secured
in
place
.
(
This
can
be
done
after
Step
3
if
preferred
.
)
2
.
Push
the
racking
interlock
in
and
insert
the
racking
crank
on
the
racking
screw
into the
upper
breaker
in
a manner
similar
to
the
step
shown
in
Figure
3
.
3
.
With
constant
pressure
on
the
racking
crank
,
rotate
counterclockwise
until
the
breaker is
in
the Disconnect
position
.
i
Figure
3
.
Racking
Circuit
Breaker
in
Switchgear
.
Courtesy of NationalSwitchgear.com