Siemens 81000 90H35

Maintenance
Page
13
After
the
trip
mechanism
has
operated
,
or
if
any
of
the
power
fuses
have been
removed
or
replaced
,
the
following
checks
and
adjustments
must
be
performed
.
Figure
11
.
Adjustment
of
Trip
Mechanism
in
Deactivated
Position
.
5
.
Referring
to
Figure
12
,
insert
a
3
/
16
”
(
4.8
mm
)
thick
shim
between
one
of
the
three
plungers
and the
adjacent
fuse
,
rotating
the
trip
bar
in
the direction
shown
.
The
micros
-
witch
contacts
should
open
at
this
point
.
If
they
do
not
,
loosen the locknut
and
adjust
the machine
screw
to
short
-
en
dimension
“
A
”
slightly
until
the switch
contacts
open
,
then
retighten
the
locknut
.
Figure
10
.
Adjustment
of
the
Plunger
1
.
All
fuses
must
be
installed
in
clips
with
load
side
of
fuse
resting
on
support
tray
as
shown
in
Figure
10
.
Plunger
end
of
fuse
must
be
facing
forward
,
away
from
discon
-
nect
fingers
on
contactor
.
2
.
With
the
trip
bar
in
its normal
spring
return
(
deactivated
position
,
the
trip
bar
should
rest
against
the
stop
screw on
the
right
hand
contactor
side
plate
as
shown
in
Figure
10
.
The
trip
bar
must
be
held
in
this
position
while
performing
adjustments
3
and
4
.
3
.
Adjust
each
of
the three
plunger
assemblies
shown
in
Figure
10
to
obtain
a
1
/
16
"
(
1.6
mm
)
gap
between the
plunger
(
1
)
and
the
end
of
the
corresponding
fuse
as
follows
:
Insert
a
1
/
16
”
(
1.6
mm
)
shim
between the end
of
the
fuse
and
the
plunger
(
1
)
.
Loosen
locknut
(
2
)
and
turn
adjusting
screw
(
3
)
until
there
is
no
gap
between
stop
nut
(
4
)
and
trip
bar
(
5
)
.
Retighten
lock
nut
(
2
)
.
4
.
Referring
to
Figure
11
,
loosen the machine
screw
which
threads
into
the
pushrod
and
adjust
outward
(
lengthen
)
until
the
micro
-
switch
contacts
just
close
.
Then
adjust
outward
one
additional
full
turn
and
tighten
the locknut
.
Figure
12
.
Operational
Check
of
Trip
Mechanism
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