GE Magne-Blast AM-13.8-1000-3H - Breaker Contacts Inspection

GEI
-
88766
3
-
If
the
ape
chute
has
suffered
any
mechanical
injury
due
to
dropping
or
accidental
striking
,
,
resulting
In
the
actual
breaking
off of
fins
*
Small
broken
corners on
.
v
-
\
v
5
’
:
replacement
of
the
chute
will
be
necessary
.
the
exhaust end
.
of
the
chute
will
not
interfere
with
its
performance
and
can
also be
disregarded
.
4
,
The
plastisol
flexible
covering
for
the
pole
pieces
(
4
)
Fig
.
16
should
If
there
are
holes
or
be
inspected
for
breaks
in
the
insulation
,
breaks
in
the
insulation
they
should
be
repaired
or
the
part
replaced
.
Arc
Chute
Removal
;
:
p
|
The
arc
chutes
of the
13.8
K
7
breakers
require
a
mechanical
aid
to
re
-
:
move
and
replace
them
at
general
maintenance
periods
.
This
can
be
ac
-
complished
by
an
overhead
crane
,
a
portable
hoist
*
or
by
an arc
chute
lifter
especially designed
for
this
purpose
.
The
arc
chute
lifter
(
16
)
Fig
.
19
bolts
on
the
top
plate
of
the
breaker
*
in
line with
the
chute
to
be
removed
*
and
will
lift
*
transport
*
and
re
-
lease the chute
as
necessary
.
To
use
the
Arc
Chute
Lifter
proceed
as
follows
:
1
.
Remove
bolts
at
the
top
and bottom of the
rear
barrier
and
remove
the
rear
barrier
.
2
.
Remove
the
side
and
interphase
barriers
by
sliding
to
the
rear
.
3
.
Remove
3
top
plate
bolts
and
mount
the
lifter
support
angle
(
13
)
Fig
.
19
.
Place
arc
chute
lifter
(
16
)
over
the
front
bushing
on
the
proper
pole
and
insert
pin
into
the
proper
hole
in
the
support
angle
.
5
»
Loosen
two
upper
support
bolts
(
2
)
,
(
Left and
right
)
6
.
Loosen
the lower
electrical
connection
bolt
(
9
)
«
.
Roll
arc
chute
to
the
rear
of
the
support
platform
.
.
Lower
the
grappling
hooks
(
17
)
by
turning
handle
counter
clockwise
until
the hooks
can
be
placed
in
the
lifting
holes
provided
in
the
top
of the
arc
chute
side
support
.
9
.
Turn
handle
clockwise
until
arc
chute
is lifted
from
the
platform
,
10
.
Move
trolly
(
15
)
to
the
rear
until
arc
chute
is
clear
of
the
platform
.
11
.
Turn
handle
of
the
arc
chute
lifter
counter
clockwise
until
arc
chute
is
resting
on
the
floor
.
12
.
Reassemble
arc
chutes
on
the
breaker
in
the
reverse
order of
items
5
to
11
above
.
«
4.3
.
When
the
arc
chute
has been
replaced
*
check
to
see
if
both
upper
44
'
support
bolts
(
2
)
and
lower
connection
bolts
(
9
)
have been
tightened
.
The
upper
bolts
serve
as
both
a
mechanical
and
electrical
connection
.
Breaker
Contacts
By
removing
the
rear
*
side
*
and
interphase
barriers
the
movable
and
sta
-
tionary
primary
contacts
and the
movable
arcing
contacts
can
be
inspect
-
ed
.
The
stationary
arcing
contacts
can
only
be
inspected
when
the
arc
chute
has
been
rolled
to
the
rear
of
the
breaker
.
This
can
be
accom
-
r
.
pushed
by
loosening
the
two
upper
bolts
(
2
)
Fig
,
19
and
one
lower bolt
|
4
(
9
)
and
rolling
the
chute
to
the
rear
of the
breaker
platform
.
.
13
Courtesy of NationalSwitchgear.com