Siemens 15-GMI-500 - Replacement of Primary Disconnect Fingers

Overhaul
44
)
-
The
spring
dump
switch
is
mounted
on
the
right
(
when
facing
the
front
of
the
breaker
)
vertical
mechanism
side
sheet
.
The
switch
is
actuated
by
a
push
rod
which
is
actuated
whenever
the
circuit
breaker
is
inserted
into
or
withdrawn
from
,
the
cubicle
.
Should
difficulty
be
suspected
with
the
spring
dump
switch
,
be
sure
to
eliminate
all
mechanical
reasons
for
difficulty
before
replacing
the
switch
.
The
switch
is
held
in
place
by
two
mounting
screws
.
Remove
the
two
screws
.
Mark
the
wires
,
and
remove
them
.
Next
,
replace
the
switch
.
Be
sure
to
use
the
same
configuration
of
flat
washers
,
lock
washers
and
nuts
as
was
present
in
the
as
-
shipped
condition
.
Replacement
of
Damper
Assembly
-
Damper
replacement
will
require
the
removal
of
a
pin
which
ties
the
damper
mounting
yoke
to
the
circuit
breaker
frame
.
Refer
to
Figure
45
.
The
damper
is
attached
to
the
mounting
yoke
with
a
lock
washer
and
5
/
8
-
18
jam
nut
.
For
added
security
,
the
jam
nut
is
treated
with
a
thread
locking
adhesive
(
Loctite
271
with
Loctite
type
T
primer
)
,
and
then
torqued
to
a
value
of
17
-
20
ft
-
lbs
.
Check
all
associated
parts
,
damper
body
and
telescoping
tube
,
for
wear
.
Replace
as
necessary
.
The
telescoping
tube
and
internal
striker
block
employ
slugs
in
variable
thicknesses
and
quantity
to
control
movable
contact
motion
.
If
the
telescoping
tube
is
replaced
,
the
tube
must
be
replaced
with
the
correct
tube
to
assure
that
the
correct
type
and
number
of
slugs
are
present
.
Replacement
of
Spring
Charging
Motor
(
Device
88
)
-
Re
-
move
the
quick
-
disconnectterminals
.
Then
remove
the
screws
holding
the
motor
mounting
bracket
to
the
breaker
housing
.
The
motor
slips
out
as
a
complete
assembly
.
Check
and
replace
as
required
.
Replacement
of
Primary
Disconnect
Fingers
-
The
primary
disconnect
finger
assembly
is
secured
with
standard
hard
-
ware
.
With
the
bolt
removed
,
the
finger
assembly
can
be
slid
off
the
retaining
arm
as
a
unit
.
Replace
burnt
fingers
or
broken
springs
as
necessary
.
F
ire
45
:
Damper
Assembly
.
Figure
44
:
Spring
Dump
Switch
(
LS
4
)
.
30
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