Siemens 81000 90H35

Maintenance
Page
16
Figure
15
.
Vacuum
Interrupter
Refer
to
Figure
15
.
Re
-
use
the
following
parts
of
the
old
interrupter
:
Compression
spring
(
4.7
)
,
spring
retainer
(
4.6
)
,
locknut
(
4.5
)
,
flexible
connection
(
4.3
)
and
articulated
bolt
(
4.2
)
with
nut
(
3.4
)
and
locknut
(
3.5
)
.
The
articulated
bolt
(
4.2
)
,
which
is
screwed
into
the
moving
contact
of
the
interrupter
,
is
fixed
by
means
of
contact
washer
(
4.4
)
and
locknut
(
4.5
)
,
in
the
same
way
as
the
flexible
connection
(
4.3
)
.
The
parts
(
4.6
)
and
(
4.7
)
are
only
slipped
NOTE
When
positioning
the
interrupter
take
care
to
see
that
the
pumping
port
(
4.1
.
6
)
locates
in
the
rear
cutout
of
the
lower
terminal
(
6
)
,
see
Figure
16
and
17
.
•
Slip
cup
(
3.3
)
onto
the
articulated
bolt
(
4.2
)
fitted
with
locknut
(
3.5
)
and
nut
(
3.4
)
.
•
Pass
the
bolt
through
the
drive
lever
(
3
)
.
•
Slip
compression
spring
(
4.7
)
and
spring
retainer
(
4.6
)
into
position
and
lock
with
nut
(
4.5
)
.
•
Slip
contact
washer
(
4.4
)
and
flexible
connection
(
4.3
)
onto
the
articulated
bolt
.
•
Screw
the
bolt
into
the
moving
contact
(
4.1
.
2
)
of
the
vacuum
interrupter
.
•
Screw
the
articulated
bolt
into
the
moving
contact
until
it
comes
up
against
the
bottom
of
the
contact
thread
or
the
locknut
comes
up
against
the
cup
(
3.3
)
.
•
Tighten
the
locknut
(
4.5
)
,
at
the
same
time
holding
the
moving
contact
(
4.1
.
2
)
in
order
to
prevent
the
bellows
from
becoming
damaged
.
•
Attach
the
flexible
connection
(
4.3
)
to
the
line
ter
-
minal
using
the
hexagon
socket
bolt
(
5.1
)
,
contact
washer
(
5.2
)
and
nut
(
5.3
)
,
see
Figure
16
.
•
Undo
the
locknut
holding
nut
(
3.4
)
.
on
.
NOTE
Replace
the
contact
washers
(
4.4
)
,
(
6.1
)
at
the
interrupter
end
of
the
flexible
connection
,
and
at
the
line
and
load
terminals
,
with
the
new
contact
washers
supplied
.
Installing
the
Replacement
Vacuum
Interrupter
:
•
Place
the
interrupter
(
4.1
)
on
the
lower
terminal
(
6
)
and
fix
it
in
position
using
a
new
contact
washer
(
6.1
)
and
the
hexagon
socket
bolt
(
6.2
)
.
Courtesy of NationalSwitchgear.com